Today I'm continuing the work on my Volvo V70 that has a problematic idle. Were also upgrading the brakes to Brembos from a Volvo S60R Follow my car Instagram: / wheelemverb
To diagnose voltage drops i would start by connecting connect 4 temporary thin cables from the dash to: *the battery positive pole *the alternator, *the big screw on the fuse box under the hood fuse box *to a free fuse position in the fuse box near the door (phone is usually free) Then connect an volt meter to a pair of the cable to see the voltage drop between them. A negative value means you need to switch the polarity. If there is a voltage drop between the alternator and the positive screw at the fuse box under the hood you have bad connection or wire between alternator and fuse box. Same applies to the other cable pairs. You can do the same between ground points too to check for bad ground connections too. Just remember the low amperage fuse in line with all the cables at the different sources to prevent damage in case of short to ground. Also remember to not use amperage mode om the multimeter. Good luck fellow volvo owner :)
@@wheelemverbJust incase you are still reading comments, my V70 2.4 also had idle problems and it ended up being the VVT reset valve, they get gummed up and it's a five minute job to replace it.
It’s definitely fixable. Plenty of cases where even the specialists can’t figure it out and this is coming from a Saab guy. I’d look into installing an OEM MAF if you haven’t already. You’re close! I recently purchased a $1000 9-3 Aero XWD and after a ton of work it’s now mint. A car should and can work as intended, even at $800.
Good point on aftermarket sensors. Could the mediocre previous owner have replaced one with a crappy alternative and not told Willem? For that matter, have we checked the coils. Wouldn't be surprised if one went bad and the solution was "replace just that one with the cheapest coil available." I suspect carbon in the EGR system, once the above question is resolved.
I pray that you should never need a new key made or a faulty CIM issue. As a Saad scantool is pretty well obsolete and required for repairs and parts are also obsolete
Parts are still being made, however Pro Parts Sweden, who makes parts for Saabs and Volvo, is often all there is for certain parts and they make JUNK. As for CIM issues, I have been through it all. I've owned 8 9-3s. I have. a Tech 2 and a donor XWD car which has helped me keep 3 other cars on the road. XWD stuff is getting harder to get a hold of but I hear a new batch of manufacturing is gonna start production in Trollhattan @@richolishis94
@@richolishis94 parts are still being made but Pro Parts has taken over a lot of it for both Saab and Volvo. They make literal JUNK. As for CIM/key issues, I’m very familiar with it. I have a Tech 2 and sec access. A good friend of mine actually runs a service to reflash and ‘virginize’ CIMs and Keys. Lots of Chinese clone tools but it works!
I had a similar frustrating problem as you on my 1999 2.4 na five cylinder Volvo S80. It would idle fine until it got hot, then it would intermittently rough idle and sometimes stall. But when the fan came on or under bonnet temperature dropped a bit, it would be okay! I replaced the ETM with the Sacer contactless kit, and it felt better, (revved cleaner) but it wasn't cured. It turned out to be the inlet VVT solenoid. When it gets hot, either the electrical circuit inside the solenoid stops working (check out a Diagnosedan video with a BMW with an hot idle problem ) or the sliding rod inside the solenoid casing (which expands faster than the casing) has varnish on it and sticks in the casing. The first thing to try is removing the electrical connector from the solenoid, to see if the idle settles. My engine only has VVT on the inlet, but the principle would apply on the exhaust as well if you have two. All through working this problem out, I never had any trouble codes and the EML never lit up. It drove me crazy for about two years until I worked out there were two problems occurring at the same time, and because the symptoms were caused by two failures, no one could diagnose it, not even my local Volvo specialist. Hope that sorts it, let me know!
The volvo v70 will always have some issues, but it is worth it anyway and if you sell it you will always regret it. Trust me. Volvo gets under your Skin, in a good way. Take care. From Sweden 🇸🇪.
Those V70's are tanks, I've seen many with over 500K km, still running, despite years of abuse and lack of proper service as they get old and cheap. Of course it's mostly the diesels here, but few gas ones, too.
This was a glorious watch in spite of things not working out ideally man, so rad to get to go through the motions with you even if they didn't end up resolving your issue. I still have hope that it ends up working out though ahah even if you're over it!
@@wheelemverb Hi i hope you can see this message. Regarding your idle issue there is one more thing you should check and that is not known to that many people, even Volvo entusiasts. In your right side-mirror there is an sensor for the outdoor ambient temperature. This sensor talks to the ECM (it will not throw an error code if its not working) And if its not working either the MAF or lambda will try to compensate and you will end up with an irregular idle. Open the right door panel and located the cables going to the side mirror. I believe there is two connectors (one for hte mirror it self and one for the sensor), unplug them both and look for corrosion. If there is no corrosion then look for damage and with a multimeter check the continuity. If you still dont find any problems then the sensor might be damaged. Change the sensor, but its much easier and less time consuming to just change the side mirror. Hope this helps. Sorry for my English.
Good luck man, hope you get to the bottom of it. I have almost the same car, 02 NA manual. One owner, maintained by one Volvo specialist mechanic for 20 years. Bad news is I brought it to him about 6 months ago with a similar hiccup in the idle and it’s still cursed. Started with an ETM rebuild by xemodex, sent back to them 3 times, and finally tried a virgin unit programmed by Volvo. Seems to be fixed every time then it will randomly have a fit some morning. BCM, CEM checked or refurbished by xemodex. Everything else tests good and if it starts and runs, you can drive it no problem. But… Something keeps intermittently crashing the CANBUS, I.e. cluster dies, abs/brake failure warnings on the dash and the idle goes to shit until you turn the car off, then it won’t start again without disconnecting the battery. I’ve basically given up on it but it’s become my mechanics White Whale. He needs to know wtf is wrong with it so he’s been poking at it nights/weekends. Last I heard another Vo specialist was going to borrow a $40’000 oscilloscope/signal analyzer and bring it to town some weekend.
Find the right replacement ETM, if yours isn't already the right one. Look up the proper part number. As far as I know the yellow labels were for both atmospheric and turbo models and signified they are the new one from the recall. They changed the color so mechanics could quickly see if the car needed the recall or if it was already done, but I may be wrong here. The first years of the P2 the ECM failure codes are a crapshoot and you will have to do actual diagnosis to find out what the root cause of your problem(s) are. You are on the right track and checked/found/fixed most things already. What I would be looking at next is possible bad contacts at the ECM connector (I have had to reseat ECMs several time and clean the connectors and such to get gremlins out of these cars) and measure "reference voltage" at the ETM to figure out if you have a voltage drop on there. Oh and by the way, the ETM on some P2s takes it's ground connection from the engine and not from the top of the wings.On the turbos it's somewhere close to the starter....
Even tho this car didnt work out 100% I’d say it came a very long way from where it started and the knowledge and skills you’ve gained are really what matters anyway. Can’t wait to see more Volvo stuff in the future! I just picked up the cheapest manual C30 on the east coast so you’ve inspired and I’m gonna start making some videos about the whole process of fixing it up and making it the ultimate daily/weekend warrior :)
please find the solution! my Friend and I have the same issue with the same car. Volvo in Germany has erased the model out of their system! they have to use Bosch to read the codes. I am begging you don`t give up find it and you will be the most beloved V70II youtuber!
You have to program that new throttle body because it's a different part number one and that maybe still won't work and check your drivers door wireharness and the light switch.
Happy that guys like me exist, you went my path . IT IS THE ETM. AND YOU DONT NEED NEW ONE. you need SACER sensor. Also check map hose , and maf sensor be sure it is good one like "Hella",
l have the same car, v70, 2003, metallic champagne with Euro style headlight wipers and 17" double 6 spoke rims. The car behaves extremely well except for unstable idle from high velocity to a sudden stop. The only solution l use is to depress the clutch and pop it into neutral while braking. Fully stop the car with clutch still engaged. Release clutch and the car immediately restores to correct idle.
My ‘99 Miata has a similar issue. 2/5 stops at a light, the revs plummet from rest (around 1200rpm) to 500-400rpm and then goes back to rest after a few seconds. If I have the Heat or Air on in the car it will do it less (my guess is there’s more power being used). But that’s about as much understanding of the issue I have. Forums say that it’s an “it is what it is” issue. The car hasn’t stalled on me so I try not to get worried about it. Thank you for the great video! I look forward to seeing more.
Don’t give up! I had a 1998 Pontiac Grand Am that had a similar idle issue under certain electrical loads. Sometimes it would actually stall out. Turned out it was a problem with the main computer, swapped it out and bam it ran perfect until I scrapped it.
No idea if you’ve already done this, but several times on a few of my previous vehicles (admittedly, not Volvos but other euros) that weird idle problem like yours was caused by a faulty temperature sensor. If I’m guessing correctly it only happens when you’ve had the car running and warmed up? If that’s the case then it’s definitely something to look into. A faulty temp sensor can cause all sorts of problems like running too rich, inconsistent idle etc etc. A good way to test is by bridging the connection between the temp sensor connector (the fan will run permanently on) and if nothing changes then I’d swap it out!
Ive owned a 03 xc70 and had the same exact issue. I went through 3 mafs all of which were bosch and none fixed it. The moment i put the volvo Maf in, the came to life again and stopped its stupid idle.
I honestly still wouldn’t be surprised of the problem would still be the ETM. They are known to go bad, like you said. Maybe you could try it with a known good one. Preferably one of a car with the same engine code and MY, that gives you the best chance of it playing nice. Luckily they are easy to swap out on the non turbo models.
Good point -- his junkyard ETM was kind of a shot in the dark. He needs the right part with the right software before ruling out an electronic fault in the ETM -- which can be repaired by XeMoDex anyway
Try replacing the bosch EVAP purge valve ontop of the radiator, underneath the airbox ducting. If that valve is stuck open/malfunctioning it will cause the idle revs to drop low. If you apply 12 volts to the valve, it should click. If it does not, then its stuck and will cause idle issues.
dunno if i commented this on the last video or not but check your VVT(s)!! i had play in the exhaust VVT on my R and that way cauing my idle issue. car would stumble randomly but mostly at idle. easy to check, pull the cover off and give them a tug, shouldnt move in or out at all. Exhaust VVTs go out in these cars commonly.
Hi i hope you can see this message. Regarding your idle issue there is one more thing you should check and that is not known to that many people, even Volvo entusiasts. In your right side-mirror there is an sensor for the outdoor ambient temperature. This sensor talks to the ECM (it will not throw an error code if its not working) And if its not working either the MAF or lambda will try to compensate and you will end up with an irregular idle. Open the right door panel and located the cables going to the side mirror. I believe there is two connectors (one for hte mirror it self and one for the sensor), unplug them both and look for corrosion. If there is no corrosion then look for damage and with a multimeter check the continuity. If you still dont find any problems then the sensor might be damaged. Change the sensor, but its much easier and less time consuming to just change the side mirror. Hope this helps. Sorry for my English.
@@gerardjones7881 thx for this - my son's V70 has idling issues and the fan also runs after he parks up & turns the engine off - so I suspected the sensor was no good - so he needs to change it in anycase.
@@flyingscot3666 Wentylator w V70II będzie włączony przez 6 minut po wyłączeniu silnika jeżeli silnik będzie gorący a na zewnątrz temperatura będzie wysoka. To normalna funkcja pojazdu. W moim V70II tak to działa. Temperatura załączenia wentylatora to 105 st C a wyłączenia to 95 st.C.
Mine had the exact same problem with the uneven idle, sometimes the throttle body even stuck to some random position. I replaced the throttle body angle sensor with magnetic sensor and that totally fixed the problem with idle. Also the clutch pedal switch was faulty on mine and that disabled cruise control, replaced that and it's been since a wonderful car to drive everyday.
@@trunkingham The throttle body angle sensor is integrated to the throttle body made by Magneti Marelli. You have to pry open the bottom lid in it and dig out some of the potting compound, in order to gain acces to the solder joints. BJP Race has a great video documenting this, it's found in youtube by name: "Byta Volvo spjäll sensor". The video is in swedish, but you can figure everything out just by looking at it. Many different resellers worldwide sell the aftermarket contractless tps (throttle position sensor). It does not need any programming unlike whole throttle body replacement.
It'll be something to do with the o2 sensor and whatnot you had to futz with. Some mismatch between the sensor, the header and what the computer is expecting so that it is never quite on the right plan coming down to idle. The idle fiddliness will be the ecm hunting for a setting that works.
I had an issue with idle, but it was worst. The car won’t drive at all, so I’ve been told by the person who fix ETMs that I have two options buy new and program it at the dealer or send mine to him and he will change the throttle position sensor. Those ETMs are programmed for each car specifically so you can’t just get used from the junkyard. So I sent mine it got fixed and after that car was driving perfect. Also this issue shows up around 200000KM (kilometres) mine went bad at 208k. It is my experience.
Just a suggestion which may resolve the issue: check the lambda sensor. I had similar issues (varying idle when hot) and the problem was a bad lambda. Also check its connectors and cabling. By the way, i enjoy a lot watching your videos. They're sincere and don't require a fully equipped workshop to do the job.
NO WAY WILLEM. You’re a big reason I got into photography in 2019-2020. Since then I have grown my skills in photography a lot. Grew away from watching youtube and creating my own things. I also have got a 01 V70 2.4t since then too haha. Cant believe this channel just popped up on here. I also had the same problem with idle and changed the pcv and put a new throttle body in. Idk if it fixed it though I haven’t driven it much since then. If you do fix this though i’ll have to check the same things on mine. p.s. you might want to update the ecu using the vida software so it knows you put a new throttle body in. idk if you have to do that with the NA engine though.
As a fellow perfectionist, don't give up! You're so close to making it mint and truly dailyable. Btw whats up with the dash pad? Never heard of a dash cracking in these cars
I know on some older Audis of this era have a rubber ring seal around the air intake that can come unglued causing air to flow into the engine unchecked and it can cause idle issues
His is the B5244S engine, of which I have two. It is the NA version of this 5 cyl whiteblock. And we had an intake leak. Idle was all over the place. My point being that I think even a small leak of unmetered air going in screws up the AFR big time and you'd notice it.
That's it I'm buying a S60R. I've watched enough of your videos. I've owned an XC90 D5 I miss that thing but I wanna go fast. Good video btw really enjoyed it.
hey buddy, I have a 2003 S60 2.4i and I have the same issue going and popping up again and again since I have the car, which is about 7 years now. It is idleing rough e.g when I get to a red light, then it is smoothing up. At some point I think in 2002 there was a change in the ETM supplier. They changed from Magnetti Marelli to Bosch. I already have the Bosch unit that is said to be better, but still not perfect. Every time I am going to a Volvo specialist repair shop for a service, I ask them to clean the ETM. It solves the issue for a while, then it comes back in 5-10 thousand km-s again. Once my Volvo specialist said that he has never seen an ETM unit on these cars that work properly for a longer time. I would give the ETM one more try, it sounds totally identical to my problem. I also know there is a company somewhere in Germany who are specialized in renewing these MM ETM units. Let me know if you need the contact. It is no wonder both of the units that you tried were faulty.
dont give it up man, you can do it. I would check if the connection between the alternator and everything else is in perfect condition, maybe change the wires as preventive maintanence and dig into the voltage drops. Often guys that remap cars can help you out with finding out these issues and maybe you will want to get that v70 remapped for some extra power, but i know not many people work on volvos, at least in my country
I have the same v70 and same issue, check out the brake booster, as from when i had bought mine, the brake booster was leaking causing the vacuum to lag and stutter like this. Hope all is well, love the videos!
This is a voltage problem. There should be a relay that switches between short and long cooling circle. It might be faulty in the way, that it does the job but messes up with ECU. It might not output the right voltage (still switching the circle though) and thus ECU could start compensating it with rpms. Fairly cheap and not obvious thing to try. It took me 2 years to figure it out in my 2005 fiesta back in the day. Your parts are probably fine. The car just makes wrong decisions. Most of the time it's electronics related, which is a nightmare to figure it out.
Volvo v70 and s60 from 01-05 had problem with throttle body but volvo fix it when the facelift came around -05. On my v70-01 it worked when i cleaned the throttle body and switched the gasket but i know people who needed to switch the throttle body and use a computer to program the new one. I remember that it was a special brand that volvo used for throttle body that had so much problem Greetings from Sweden 🙂
There's a sensor connected to the clutch pedal under the dash. If it's out of spec or faulty, the idle could act up. Faulty one disables the cruise control. And idle correction when depressing clutch at a stop n go . Values in resistance for sensor is out there on forums. Good luck!
I've got an 04 S60R and I love the thing, but it needs about $6000 in work, including major rust repair. Probably going to end up parting the car out since I can't put that much into it. The engine and transmission are in amazing condition, but the angle gear is going out, all the suspension needs to be redone and so on.
I also got a v70 p2. The MAF has always been a problem. Also the air intake valve control solenoid. Barometric pressure sensor A just popped up. Greetings from Sweden. Yours is way nicer!
My 2006 idled a bit rough even from when it was new. I chalked it up to having 5 cylinders. My ABS module isn't working either, but I thought 'too expensive.' Da Junk Yard! Thanks!
It sounds like when I used to work on aircraft. Sometimes to diagnose electrical problems, we would just start turning on systems that drew a lot of power. There was a chart that showed the power consumption for everything, so we would just find the highest load systems and turn them on at the same time. Sometimes things only start to show their issues when you put a lot of stress on them.
Voltage drops on grounds and power wires, somewhere you have a weak or compromised connection. Could be a damaged or corroded wire or connection in the harness parasitically affecting power to the throttle body. Your're gonna need schematics with connector location info, and a scope to watch as you test wires, and watch Ivan (Pine Hollow Auto Diagnostics), Mario (Super Mario Auto Diagnostics), and Bernie Thompson (Automotive Test Solutions) videos to figure it out. Most shops do not have techs with the skills and equipment to fix stuff like this. I use to buy unfixable cars just to fix and sell. I was never even the best at it, I know guys way better than me, but it just means it's not the car that's unfixable, it's the people working on it are incapable, DIYer nbot included, don't give up, it's probably something so simple
@WheelemVerb - Check that serpentine belt! It's on backwards. Ribs always go towards the ribbed side of a pulley. This will result in less contact surface for the belt if not put on correctly allowing slippage.
I really know nothing about cars but I do want to share a kind of similar situation, my Smart 450 had an engine replacement and after it the clutch actuator would just slip the car into neutral when going in reverse, wouldn't go into gear, all without any codes or errors popping out. Turns out the guy who did our engine replacement did the wiring either in the wrong order or ''not as neatly as needed'' plus the way he mounted the cooler actually damaged an electrical component. After that was fixed the car never had any electrical issues again.
well. a volvo is a relible car. but it isnt easy to fix. my dad has a v70 from 2006 but it only runs on 3 of the 5 cylinders. Also tried a lot of things but that car WONT run good. we are about more than half a year further. so keep the hands up if you want to fix it. love the video`s. Greats from the Netherlands
You could be off a tooth on timing. On the 04 R I picked up this was the case despite no check engine light or warning in VIDA (it should throw a CEL). I don't think this NA has a vvt hub on the intake, but it might on the exhaust. Watch my most recent video about the black s60 R if you're curious how I diagnosed this in VIDA.
Your videos are cool. My first car is an 2006 xc70 and I really like it. I noticed after doing some exhaust repair that the car now revs a bit high for a few seconds on cold starts and then releases to idle. I read that volvos do that for to meet emissions. I don't know maybe an o2 sensor or something could fix your uneven idle. Cheers
great video, voltage spikes and dips is screaming a possible cem issue to me. It's a common thing to break and give very weird issues just like this. Although I've personally never encountered this exact problem. I assume there's places that inspect and repair them in the US as well.
XeMoDex in Canada repairs lots of modules from lots of models. They just overhauled my DIM which resolved about a dozen mysterious (but essentially fake) codes from a bunch of other modules. Was very pleased with the result -- no codes and the message screen is legible again.
Thoroughly cleaning your ENTIRE intake does wonders. Air filter, MAF sensor, good ETM cleaning. Then remove manifold and degrease the inside with Dawn dish soap and scrubbing, rinse thoroughly and allow to dry -- a lot of oil accumulates in there. PCV has to be done too, especially if engine shudders coming to a stop (as RPM is dropping I assume). I would interpret that as a PCV issue; intake vacuum is decreasing at that moment, I wouldn't be surprised if the crankcase is still trying to get rid of excess pressure and is briefly out of sync with how much the intake is sucking up.
My 2001 Volvo V70 2.4 NA manual (on BCs, and R brakes too) has the exact same idle issue. And I went through everything too. Ultimately, I’ve also decided it’s easier to put a bit of pressure on the pedal at a stop and ignore the problem than it is to keep chasing it.
Does your cruise control work or does it not engage/randomly cut out? If it does, check out the solid state TPS modification you can make. Had similar issues with my V70 idling - it got so bad that it would shut down whilst driving, the solid state TPS mod fixed it for me and fixed the cruise control along with it.@@wheelemverb
You should ask David Bello what he thinks could be wrong with your Volvo V70. He would probably know what it could be. He's a longtime Volvo enthusiast and TH-camr. I believe he's living full time in California now. If you haven't met or heard of him already then you should definity check him out on TH-cam and other social media platforms. He's probably one of the best Volvo guru resources there is.
You need to install a throttle body with the same part number, from the exact year, make, and model car. Otherwise, switching them around isn't going to work.
We tried the xemodex one but it wouldn’t load up with software for some reason. The car acts identical with the new (used) throttle body and runs exactly the same.
Really ALL the airbags should be replaced. But Volvo only issued the recall on the steering wheel one since that's the one that injured people. But the root cause of that issue (humidity causing the explosive grains to breakdown, altering the ratio of surface area to volume and thus the rate of combustion) will affect all airbags equally. My point being, if your car is affected at all by the issue, Volvo's recall is only a partial solution to a problem that could cause the same injury, just from a different direction or to a different passenger.
Man idk I would only be confident in crossing things off the list if they are brand new on a Volvo. I have an 04 R and have had to chase down all kinds of gremlins. My gut tells me either maf, throttle body, or if you’ve already tried new/KNOWN working substitutes then it screams Volvo computer issues😅. Don’t know if you’ve tried resetting the ecu by pulling the proper fuses and turning the car over to reset or by using battery. If resets don’t work than one of those computers in the car could be looked at by sending into xemodex🤷🏻♂️. I’m only throwing my 2 cents in cause I love Volvos and keeping em going, especially a wagon
Have you done the standards like checking vacuum tubes for leaks? VVT been cleaned? checked the LMM? Also i believe a exhaust leak before the Lambda can also give this kind of fault... Also as Legambaz says in the comments get the right color code on the ETM/ETA for your car.
The battery acts as a buffer. If it is not working well, all systems in the car will suffer especially engine performance. I would attack that first because it is so easy to test. But alternator would be next if battery was ok.
have you checked negative battery and chassis cables? in old cars those tend to have increased resistance across the entire cable mostly because of internal corrosion and a symptom of that is a voltage drop whenever there is any i”voltage consumer activated ( a/c, radiator fans, windows, lights, etc). I had an old Passat with same symptoms and replacing both negative cables problem got solved. just an idea …
Wires, Once car is warm and problematic start pinching, wiggling wires going to TPS ( throttle position sensor). You can get short finders etc but just my guess. Looks identical to my TPS and issues had. Was a faulty wire. Could also replace the TPS but my bet is it's a wire
If Volvo's use the pcm or an external module to control field current in the alternator id look there next, that much voltage sag looks abnormal for no more load than the system should be under operating the windows. The voltage dip may be unrelated too. If the maf is dirty or a poor quality aftermarket then the normal rpm dip (few dozen rpm) for electrical load may be exacerbated by large swings in fueling from incorrect maf signals when the closed loop fueling control is trying to chase a moving target.
Ah that’s very interesting. Yes I do believe they use the CEM (central electronics module). Certainly a commonly faulty module too. I think it’s currently up between MAF, CEM or Throttle body. Thanks for your input
Try disconnecting fuses to se if there is one connection that is problematic, understand your frustration. I had an Audi that left me with a sower taste, now I stick mostly to land rovers 😊
I had exactly same problem in my Mazda 626. It drops idle when it was super hot. I changed everything same like you did. And you know what? Ones I went to the trip to another country and there the problem had gone. Then, I went back home and problem had back also. I started thinking what has happend and I think the problem is in petrol. The country where I was has petrol without ethanol.
Are all injector O rings OK? I had s similar issue in my R and it turned out to be an improperly seated injector. Also not a bad idea to ensure they are all flowing properly. I was chasing a stumble upon stopping while rpm returned to idle for so long in my 04 SR… I checked vacuum leaks, maf throttle body, fuel pump, fuel fuel pressure sensor, 02 sensors, spark etc… same deal as you. Turned out an injector had decided to unseat itself slightly after reinstalling and driving for a couple weeks. Also just curious - are you getting any hard starting only when the car is hot? Cold starts good, hot starts hesitate? Also it could be a leaky valve if it’s exclusively just rough idle when warm.
Wait, I had the same issue on an S60 2004, first it was the idle, and then the car wouldn't start even after changing a few parts (there was a camshaft position sensor error), like the gas pump, and some of the camshaft sensors, in the end I ended up junking it.
To diagnose voltage drops i would start by connecting connect 4 temporary thin cables from the dash to:
*the battery positive pole
*the alternator,
*the big screw on the fuse box under the hood fuse box
*to a free fuse position in the fuse box near the door (phone is usually free)
Then connect an volt meter to a pair of the cable to see the voltage drop between them.
A negative value means you need to switch the polarity.
If there is a voltage drop between the alternator and the positive screw at the fuse box under the hood you have bad connection or wire between alternator and fuse box.
Same applies to the other cable pairs.
You can do the same between ground points too to check for bad ground connections too.
Just remember the low amperage fuse in line with all the cables at the different sources to prevent damage in case of short to ground. Also remember to not use amperage mode om the multimeter.
Good luck fellow volvo owner :)
Thank you so much for the suggestion! I will follow up when I give this a shot :)
@@wheelemverbJust incase you are still reading comments, my V70 2.4 also had idle problems and it ended up being the VVT reset valve, they get gummed up and it's a five minute job to replace it.
I'd rather eat my own foot than do that
@@robertmassucci1 yeah reading that was like, 'oi'.. omfg...
It’s definitely fixable. Plenty of cases where even the specialists can’t figure it out and this is coming from a Saab guy. I’d look into installing an OEM MAF if you haven’t already. You’re close! I recently purchased a $1000 9-3 Aero XWD and after a ton of work it’s now mint. A car should and can work as intended, even at $800.
Good point on aftermarket sensors. Could the mediocre previous owner have replaced one with a crappy alternative and not told Willem? For that matter, have we checked the coils. Wouldn't be surprised if one went bad and the solution was "replace just that one with the cheapest coil available." I suspect carbon in the EGR system, once the above question is resolved.
Also check all your grounds.
I pray that you should never need a new key made or a faulty CIM issue. As a Saad scantool is pretty well obsolete and required for repairs and parts are also obsolete
Parts are still being made, however Pro Parts Sweden, who makes parts for Saabs and Volvo, is often all there is for certain parts and they make JUNK. As for CIM issues, I have been through it all. I've owned 8 9-3s. I have. a Tech 2 and a donor XWD car which has helped me keep 3 other cars on the road. XWD stuff is getting harder to get a hold of but I hear a new batch of manufacturing is gonna start production in Trollhattan @@richolishis94
@@richolishis94 parts are still being made but Pro Parts has taken over a lot of it for both Saab and Volvo. They make literal JUNK. As for CIM/key issues, I’m very familiar with it. I have a Tech 2 and sec access. A good friend of mine actually runs a service to reflash and ‘virginize’ CIMs and Keys. Lots of Chinese clone tools but it works!
I had a similar frustrating problem as you on my 1999 2.4 na five cylinder Volvo S80. It would idle fine until it got hot, then it would intermittently rough idle and sometimes stall. But when the fan came on or under bonnet temperature dropped a bit, it would be okay! I replaced the ETM with the Sacer contactless kit, and it felt better, (revved cleaner) but it wasn't cured. It turned out to be the inlet VVT solenoid. When it gets hot, either the electrical circuit inside the solenoid stops working (check out a Diagnosedan video with a BMW with an hot idle problem ) or the sliding rod inside the solenoid casing (which expands faster than the casing) has varnish on it and sticks in the casing. The first thing to try is removing the electrical connector from the solenoid, to see if the idle settles. My engine only has VVT on the inlet, but the principle would apply on the exhaust as well if you have two. All through working this problem out, I never had any trouble codes and the EML never lit up. It drove me crazy for about two years until I worked out there were two problems occurring at the same time, and because the symptoms were caused by two failures, no one could diagnose it, not even my local Volvo specialist. Hope that sorts it, let me know!
I see someone else suggested the Volvo brand MAF. This also fixed it for my 06 V70R. Don’t give up. I enjoyed watching this the series!
The volvo v70 will always have some issues, but it is worth it anyway and if you sell it you will always regret it. Trust me. Volvo gets under your Skin, in a good way.
Take care. From Sweden 🇸🇪.
Jag haller med dig!
Those V70's are tanks, I've seen many with over 500K km, still running, despite years of abuse and lack of proper service as they get old and cheap. Of course it's mostly the diesels here, but few gas ones, too.
too complex for my blood from '98 on
This was a glorious watch in spite of things not working out ideally man, so rad to get to go through the motions with you even if they didn't end up resolving your issue. I still have hope that it ends up working out though ahah even if you're over it!
Thanks Willy!!
@@wheelemverb Hi i hope you can see this message.
Regarding your idle issue there is one more thing you should check and that is not known to that many people, even Volvo entusiasts.
In your right side-mirror there is an sensor for the outdoor ambient temperature. This sensor talks to the ECM (it will not throw an error code if its not working)
And if its not working either the MAF or lambda will try to compensate and you will end up with an irregular idle.
Open the right door panel and located the cables going to the side mirror. I believe there is two connectors (one for hte mirror it self and one for the sensor), unplug them both and look for corrosion. If there is no corrosion then look for damage and with a multimeter check the continuity. If you still dont find any problems then the sensor might be damaged. Change the sensor, but its much easier and less time consuming to just change the side mirror.
Hope this helps. Sorry for my English.
Good luck man, hope you get to the bottom of it. I have almost the same car, 02 NA manual. One owner, maintained by one Volvo specialist mechanic for 20 years.
Bad news is I brought it to him about 6 months ago with a similar hiccup in the idle and it’s still cursed. Started with an ETM rebuild by xemodex, sent back to them 3 times, and finally tried a virgin unit programmed by Volvo. Seems to be fixed every time then it will randomly have a fit some morning. BCM, CEM checked or refurbished by xemodex. Everything else tests good and if it starts and runs, you can drive it no problem. But… Something keeps intermittently crashing the CANBUS, I.e. cluster dies, abs/brake failure warnings on the dash and the idle goes to shit until you turn the car off, then it won’t start again without disconnecting the battery.
I’ve basically given up on it but it’s become my mechanics White Whale. He needs to know wtf is wrong with it so he’s been poking at it nights/weekends. Last I heard another Vo specialist was going to borrow a $40’000 oscilloscope/signal analyzer and bring it to town some weekend.
Find the right replacement ETM, if yours isn't already the right one. Look up the proper part number. As far as I know the yellow labels were for both atmospheric and turbo models and signified they are the new one from the recall. They changed the color so mechanics could quickly see if the car needed the recall or if it was already done, but I may be wrong here.
The first years of the P2 the ECM failure codes are a crapshoot and you will have to do actual diagnosis to find out what the root cause of your problem(s) are. You are on the right track and checked/found/fixed most things already. What I would be looking at next is possible bad contacts at the ECM connector (I have had to reseat ECMs several time and clean the connectors and such to get gremlins out of these cars) and measure "reference voltage" at the ETM to figure out if you have a voltage drop on there. Oh and by the way, the ETM on some P2s takes it's ground connection from the engine and not from the top of the wings.On the turbos it's somewhere close to the starter....
Even tho this car didnt work out 100% I’d say it came a very long way from where it started and the knowledge and skills you’ve gained are really what matters anyway. Can’t wait to see more Volvo stuff in the future! I just picked up the cheapest manual C30 on the east coast so you’ve inspired and I’m gonna start making some videos about the whole process of fixing it up and making it the ultimate daily/weekend warrior :)
please find the solution! my Friend and I have the same issue with the same car. Volvo in Germany has erased the model out of their system! they have to use Bosch to read the codes. I am begging you don`t give up find it and you will be the most beloved V70II youtuber!
You have to program that new throttle body because it's a different part number one and that maybe still won't work and check your drivers door wireharness and the light switch.
Woa I’m so shocked but absolutely stoked you have a channel like this! You’re a dude way more after my own heart than I initially thought!
Fantastische Volvo video’s. Complex probleem wel, nog veel succes met de diagnose!
Happy that guys like me exist, you went my path . IT IS THE ETM. AND YOU DONT NEED NEW ONE. you need SACER sensor. Also check map hose , and maf sensor be sure it is good one like "Hella",
l have the same car, v70, 2003, metallic champagne with Euro style headlight wipers and 17" double 6 spoke rims. The car behaves extremely well except for unstable idle from high velocity to a sudden stop. The only solution l use is to depress the clutch and pop it into neutral while braking. Fully stop the car with clutch still engaged. Release clutch and the car immediately restores to correct idle.
My ‘99 Miata has a similar issue. 2/5 stops at a light, the revs plummet from rest (around 1200rpm) to 500-400rpm and then goes back to rest after a few seconds.
If I have the Heat or Air on in the car it will do it less (my guess is there’s more power being used). But that’s about as much understanding of the issue I have.
Forums say that it’s an “it is what it is” issue. The car hasn’t stalled on me so I try not to get worried about it.
Thank you for the great video! I look forward to seeing more.
Don’t give up! I had a 1998 Pontiac Grand Am that had a similar idle issue under certain electrical loads. Sometimes it would actually stall out. Turned out it was a problem with the main computer, swapped it out and bam it ran perfect until I scrapped it.
Your Volvo is fixable!! Remember the motto of the crew in the movie "Galaxy Quest." NEVER GIVE UP. NEVER SURRENDER." ❤
"By Grabthar's hammer, you shall be avenged."
No idea if you’ve already done this, but several times on a few of my previous vehicles (admittedly, not Volvos but other euros) that weird idle problem like yours was caused by a faulty temperature sensor. If I’m guessing correctly it only happens when you’ve had the car running and warmed up? If that’s the case then it’s definitely something to look into. A faulty temp sensor can cause all sorts of problems like running too rich, inconsistent idle etc etc. A good way to test is by bridging the connection between the temp sensor connector (the fan will run permanently on) and if nothing changes then I’d swap it out!
Ive owned a 03 xc70 and had the same exact issue. I went through 3 mafs all of which were bosch and none fixed it. The moment i put the volvo Maf in, the came to life again and stopped its stupid idle.
Interesting. Might have to fire the parts cannon once more 😂
I honestly still wouldn’t be surprised of the problem would still be the ETM. They are known to go bad, like you said. Maybe you could try it with a known good one. Preferably one of a car with the same engine code and MY, that gives you the best chance of it playing nice. Luckily they are easy to swap out on the non turbo models.
Good point -- his junkyard ETM was kind of a shot in the dark. He needs the right part with the right software before ruling out an electronic fault in the ETM -- which can be repaired by XeMoDex anyway
Try replacing the bosch EVAP purge valve ontop of the radiator, underneath the airbox ducting. If that valve is stuck open/malfunctioning it will cause the idle revs to drop low.
If you apply 12 volts to the valve, it should click. If it does not, then its stuck and will cause idle issues.
Low when coasting/decelerating? That's my issue
I would check the vacuum lines by the engine mount near the firewall
dunno if i commented this on the last video or not but check your VVT(s)!! i had play in the exhaust VVT on my R and that way cauing my idle issue. car would stumble randomly but mostly at idle. easy to check, pull the cover off and give them a tug, shouldnt move in or out at all. Exhaust VVTs go out in these cars commonly.
The VVT is new. The old one had lots of play so I replaced it but no difference :’)
@@wheelemverb dang. Sorry to hear that.
You deserve waaay more subscribers. Amazing quality content!
Had the same issue, changed the MAF and loads of stuff in the end, disconnected the alarm and the idle issue was solved
Just by removing the fuse or full wires pulled?
@@trunkingham , disconnected the unit itself in the right wheel arch
Hi i hope you can see this message.
Regarding your idle issue there is one more thing you should check and that is not known to that many people, even Volvo entusiasts.
In your right side-mirror there is an sensor for the outdoor ambient temperature. This sensor talks to the ECM (it will not throw an error code if its not working)
And if its not working either the MAF or lambda will try to compensate and you will end up with an irregular idle.
Open the right door panel and located the cables going to the side mirror. I believe there is two connectors (one for hte mirror it self and one for the sensor), unplug them both and look for corrosion. If there is no corrosion then look for damage and with a multimeter check the continuity. If you still dont find any problems then the sensor might be damaged. Change the sensor, but its much easier and less time consuming to just change the side mirror.
Hope this helps. Sorry for my English.
Do you find the dash cluster shows the wrong outside temperature when this happens?
@@trunkingham no , the dash uses the other temp sensor in the drivers side mirror. Theres 2.
coolant temp sensor can cause poor idle, after mkt parts are a no no.
@@gerardjones7881 thx for this - my son's V70 has idling issues and the fan also runs after he parks up & turns the engine off - so I suspected the sensor was no good - so he needs to change it in anycase.
@@flyingscot3666 Wentylator w V70II będzie włączony przez 6 minut po wyłączeniu silnika jeżeli silnik będzie gorący a na zewnątrz temperatura będzie wysoka. To normalna funkcja pojazdu. W moim V70II tak to działa. Temperatura załączenia wentylatora to 105 st C a wyłączenia to 95 st.C.
Mine had the exact same problem with the uneven idle, sometimes the throttle body even stuck to some random position. I replaced the throttle body angle sensor with magnetic sensor and that totally fixed the problem with idle. Also the clutch pedal switch was faulty on mine and that disabled cruise control, replaced that and it's been since a wonderful car to drive everyday.
Was it the same part number? Or same part just updated and new part number?
@@trunkingham The throttle body angle sensor is integrated to the throttle body made by Magneti Marelli. You have to pry open the bottom lid in it and dig out some of the potting compound, in order to gain acces to the solder joints. BJP Race has a great video documenting this, it's found in youtube by name: "Byta Volvo spjäll sensor". The video is in swedish, but you can figure everything out just by looking at it. Many different resellers worldwide sell the aftermarket contractless tps (throttle position sensor). It does not need any programming unlike whole throttle body replacement.
It'll be something to do with the o2 sensor and whatnot you had to futz with. Some mismatch between the sensor, the header and what the computer is expecting so that it is never quite on the right plan coming down to idle. The idle fiddliness will be the ecm hunting for a setting that works.
I had an issue with idle, but it was worst. The car won’t drive at all, so I’ve been told by the person who fix ETMs that I have two options buy new and program it at the dealer or send mine to him and he will change the throttle position sensor. Those ETMs are programmed for each car specifically so you can’t just get used from the junkyard. So I sent mine it got fixed and after that car was driving perfect. Also this issue shows up around 200000KM (kilometres) mine went bad at 208k.
It is my experience.
Just a suggestion which may resolve the issue: check the lambda sensor. I had similar issues (varying idle when hot) and the problem was a bad lambda. Also check its connectors and cabling.
By the way, i enjoy a lot watching your videos. They're sincere and don't require a fully equipped workshop to do the job.
NO WAY WILLEM. You’re a big reason I got into photography in 2019-2020. Since then I have grown my skills in photography a lot. Grew away from watching youtube and creating my own things. I also have got a 01 V70 2.4t since then too haha. Cant believe this channel just popped up on here. I also had the same problem with idle and changed the pcv and put a new throttle body in. Idk if it fixed it though I haven’t driven it much since then. If you do fix this though i’ll have to check the same things on mine.
p.s.
you might want to update the ecu using the vida software so it knows you put a new throttle body in. idk if you have to do that with the NA engine though.
Had the same idle issue with my Volvo v40 2003 - root cause was a bad fuel pump. Resolved the issue.
As a fellow perfectionist, don't give up! You're so close to making it mint and truly dailyable. Btw whats up with the dash pad? Never heard of a dash cracking in these cars
It’s not cracking haha I somewhat liked the look of it but I did take it out later
Really like the look you've given the car! Great build! You should be proud, it's a credit to you!
I know on some older Audis of this era have a rubber ring seal around the air intake that can come unglued causing air to flow into the engine unchecked and it can cause idle issues
His is the B5244S engine, of which I have two. It is the NA version of this 5 cyl whiteblock. And we had an intake leak. Idle was all over the place. My point being that I think even a small leak of unmetered air going in screws up the AFR big time and you'd notice it.
Thanks for the video. You'll figure it out. Let the solution find you!
That's it I'm buying a S60R. I've watched enough of your videos. I've owned an XC90 D5 I miss that thing but I wanna go fast.
Good video btw really enjoyed it.
hey buddy, I have a 2003 S60 2.4i and I have the same issue going and popping up again and again since I have the car, which is about 7 years now. It is idleing rough e.g when I get to a red light, then it is smoothing up. At some point I think in 2002 there was a change in the ETM supplier. They changed from Magnetti Marelli to Bosch. I already have the Bosch unit that is said to be better, but still not perfect. Every time I am going to a Volvo specialist repair shop for a service, I ask them to clean the ETM. It solves the issue for a while, then it comes back in 5-10 thousand km-s again.
Once my Volvo specialist said that he has never seen an ETM unit on these cars that work properly for a longer time. I would give the ETM one more try, it sounds totally identical to my problem. I also know there is a company somewhere in Germany who are specialized in renewing these MM ETM units. Let me know if you need the contact. It is no wonder both of the units that you tried were faulty.
Got the exact same car and boy it's a joy to drive. Keep it up
dont give it up man, you can do it.
I would check if the connection between the alternator and everything else is in perfect condition, maybe change the wires as preventive maintanence and dig into the voltage drops. Often guys that remap cars can help you out with finding out these issues and maybe you will want to get that v70 remapped for some extra power, but i know not many people work on volvos, at least in my country
I have the same v70 and same issue, check out the brake booster, as from when i had bought mine, the brake booster was leaking causing the vacuum to lag and stutter like this. Hope all is well, love the videos!
This is a voltage problem. There should be a relay that switches between short and long cooling circle. It might be faulty in the way, that it does the job but messes up with ECU. It might not output the right voltage (still switching the circle though) and thus ECU could start compensating it with rpms. Fairly cheap and not obvious thing to try. It took me 2 years to figure it out in my 2005 fiesta back in the day.
Your parts are probably fine. The car just makes wrong decisions. Most of the time it's electronics related, which is a nightmare to figure it out.
I hate that it didn’t work BUT at least the gx loved for another day! We gotta see some videos on that!!
Volvo v70 and s60 from 01-05 had problem with throttle body but volvo fix it when the facelift came around -05. On my v70-01 it worked when i cleaned the throttle body and switched the gasket but i know people who needed to switch the throttle body and use a computer to program the new one. I remember that it was a special brand that volvo used for throttle body that had so much problem
Greetings from Sweden 🙂
My idle also bouncing up and down
I had the same problemen with my s60 2.0 t. Disconnected the battery for half hour. Solved the problem.
There's a sensor connected to the clutch pedal under the dash. If it's out of spec or faulty, the idle could act up. Faulty one disables the cruise control. And idle correction when depressing clutch at a stop n go . Values in resistance for sensor is out there on forums. Good luck!
When I got the car it had been removed but I put a new one in. I remember there being a calibration procedure. I’ll look into that again
I had that thought, and possibly check the throttle pedal too
I've got an 04 S60R and I love the thing, but it needs about $6000 in work, including major rust repair. Probably going to end up parting the car out since I can't put that much into it. The engine and transmission are in amazing condition, but the angle gear is going out, all the suspension needs to be redone and so on.
I also got a v70 p2. The MAF has always been a problem. Also the air intake valve control solenoid. Barometric pressure sensor A just popped up. Greetings from Sweden. Yours is way nicer!
My 2006 idled a bit rough even from when it was new. I chalked it up to having 5 cylinders. My ABS module isn't working either, but I thought 'too expensive.' Da Junk Yard! Thanks!
I’m pretty sure Volvo has a technical journal regarding replacing the ETM and its wiring harness going from ETM to the ECM. It might apply to this
It sounds like when I used to work on aircraft. Sometimes to diagnose electrical problems, we would just start turning on systems that drew a lot of power. There was a chart that showed the power consumption for everything, so we would just find the highest load systems and turn them on at the same time. Sometimes things only start to show their issues when you put a lot of stress on them.
If you want an amazing wagon - is300 sport cross. They don’t come manual but swaps are common, super fun car. I’ve had two manual sedans
Maybe upgrade to an H8 battery? That "bigger bucket" fits perfectly if you want to run some extra electrical loads.
Voltage drops on grounds and power wires, somewhere you have a weak or compromised connection. Could be a damaged or corroded wire or connection in the harness parasitically affecting power to the throttle body. Your're gonna need schematics with connector location info, and a scope to watch as you test wires, and watch Ivan (Pine Hollow Auto Diagnostics), Mario (Super Mario Auto Diagnostics), and Bernie Thompson (Automotive Test Solutions) videos to figure it out. Most shops do not have techs with the skills and equipment to fix stuff like this. I use to buy unfixable cars just to fix and sell. I was never even the best at it, I know guys way better than me, but it just means it's not the car that's unfixable, it's the people working on it are incapable, DIYer nbot included, don't give up, it's probably something so simple
@WheelemVerb - Check that serpentine belt! It's on backwards. Ribs always go towards the ribbed side of a pulley. This will result in less contact surface for the belt if not put on correctly allowing slippage.
it's a MAF problem mate. For sure! Change to a new one if you can and the problem will be solved!
I really know nothing about cars but I do want to share a kind of similar situation, my Smart 450 had an engine replacement and after it the clutch actuator would just slip the car into neutral when going in reverse, wouldn't go into gear, all without any codes or errors popping out. Turns out the guy who did our engine replacement did the wiring either in the wrong order or ''not as neatly as needed'' plus the way he mounted the cooler actually damaged an electrical component. After that was fixed the car never had any electrical issues again.
well. a volvo is a relible car. but it isnt easy to fix. my dad has a v70 from 2006 but it only runs on 3 of the 5 cylinders. Also tried a lot of things but that car WONT run good. we are about more than half a year further. so keep the hands up if you want to fix it. love the video`s. Greats from the Netherlands
Check the ground cable from the starter motor,it gave my V70 some rough idle😊
You could be off a tooth on timing. On the 04 R I picked up this was the case despite no check engine light or warning in VIDA (it should throw a CEL). I don't think this NA has a vvt hub on the intake, but it might on the exhaust. Watch my most recent video about the black s60 R if you're curious how I diagnosed this in VIDA.
Yes variable on front cam only
Your videos are cool. My first car is an 2006 xc70 and I really like it. I noticed after doing some exhaust repair that the car now revs a bit high for a few seconds on cold starts and then releases to idle. I read that volvos do that for to meet emissions. I don't know maybe an o2 sensor or something could fix your uneven idle. Cheers
Yeah I just had a look online so that's what I came up with I'll see if I come up with anything else
great video, voltage spikes and dips is screaming a possible cem issue to me. It's a common thing to break and give very weird issues just like this.
Although I've personally never encountered this exact problem. I assume there's places that inspect and repair them in the US as well.
XeMoDex in Canada repairs lots of modules from lots of models. They just overhauled my DIM which resolved about a dozen mysterious (but essentially fake) codes from a bunch of other modules. Was very pleased with the result -- no codes and the message screen is legible again.
Just a thought - were you able to verify the voltage drop doesn’t occur on a similar Volvo without this issue?
Take the original throttle body apart, make sure everything looks right in there...
And then when that fails, live stream the MAF data...
Thoroughly cleaning your ENTIRE intake does wonders. Air filter, MAF sensor, good ETM cleaning. Then remove manifold and degrease the inside with Dawn dish soap and scrubbing, rinse thoroughly and allow to dry -- a lot of oil accumulates in there. PCV has to be done too, especially if engine shudders coming to a stop (as RPM is dropping I assume). I would interpret that as a PCV issue; intake vacuum is decreasing at that moment, I wouldn't be surprised if the crankcase is still trying to get rid of excess pressure and is briefly out of sync with how much the intake is sucking up.
My 2001 Volvo V70 2.4 NA manual (on BCs, and R brakes too) has the exact same idle issue. And I went through everything too. Ultimately, I’ve also decided it’s easier to put a bit of pressure on the pedal at a stop and ignore the problem than it is to keep chasing it.
I’ve been doing the same. We need to figure this out 😂😭
Does your cruise control work or does it not engage/randomly cut out? If it does, check out the solid state TPS modification you can make. Had similar issues with my V70 idling - it got so bad that it would shut down whilst driving, the solid state TPS mod fixed it for me and fixed the cruise control along with it.@@wheelemverb
Чувак, ты молодец! Отличная машина и отличный проект!
You should ask David Bello what he thinks could be wrong with your Volvo V70. He would probably know what it could be. He's a longtime Volvo enthusiast and TH-camr. I believe he's living full time in California now. If you haven't met or heard of him already then you should definity check him out on TH-cam and other social media platforms. He's probably one of the best Volvo guru resources there is.
You need to install a throttle body with the same part number, from the exact year, make, and model car. Otherwise, switching them around isn't going to work.
We tried the xemodex one but it wouldn’t load up with software for some reason. The car acts identical with the new (used) throttle body and runs exactly the same.
Make sure to go to the dealer and get a new airbag under the takata recall.
Wil;ll actually post that he did this over on his IG
Really ALL the airbags should be replaced. But Volvo only issued the recall on the steering wheel one since that's the one that injured people. But the root cause of that issue (humidity causing the explosive grains to breakdown, altering the ratio of surface area to volume and thus the rate of combustion) will affect all airbags equally. My point being, if your car is affected at all by the issue, Volvo's recall is only a partial solution to a problem that could cause the same injury, just from a different direction or to a different passenger.
Man idk I would only be confident in crossing things off the list if they are brand new on a Volvo. I have an 04 R and have had to chase down all kinds of gremlins. My gut tells me either maf, throttle body, or if you’ve already tried new/KNOWN working substitutes then it screams Volvo computer issues😅. Don’t know if you’ve tried resetting the ecu by pulling the proper fuses and turning the car over to reset or by using battery. If resets don’t work than one of those computers in the car could be looked at by sending into xemodex🤷🏻♂️. I’m only throwing my 2 cents in cause I love Volvos and keeping em going, especially a wagon
Have you done the standards like checking vacuum tubes for leaks? VVT been cleaned? checked the LMM? Also i believe a exhaust leak before the Lambda can also give this kind of fault... Also as Legambaz says in the comments get the right color code on the ETM/ETA for your car.
oil filter housing seal?
Doesn't this car have a Idle control valve? That would be the first thing to check in my opinion.
The battery acts as a buffer. If it is not working well, all systems in the car will suffer especially engine performance. I would attack that first because it is so easy to test. But alternator would be next if battery was ok.
I have the same 04 and hope to do the manual swap one day! R rims and all 😂
I owned a white Volvo s70 for 23 years. I had the same problem with low idle and sometimes stalling.
have you checked negative battery and chassis cables? in old cars those tend to have increased resistance across the entire cable mostly because of internal corrosion and a symptom of that is a voltage drop whenever there is any i”voltage consumer activated ( a/c, radiator fans, windows, lights, etc). I had an old Passat with same symptoms and replacing both negative cables problem got solved. just an idea …
I had a software update for the ETM on my s60 and that worked
not sure if it was off camera but the smoke tester wasn't actually building any pressure in the clip where you showed the gauge
Wires, Once car is warm and problematic start pinching, wiggling wires going to TPS ( throttle position sensor). You can get short finders etc but just my guess. Looks identical to my TPS and issues had. Was a faulty wire. Could also replace the TPS but my bet is it's a wire
You need check all injectors end coils if ar working good.
If Volvo's use the pcm or an external module to control field current in the alternator id look there next, that much voltage sag looks abnormal for no more load than the system should be under operating the windows.
The voltage dip may be unrelated too. If the maf is dirty or a poor quality aftermarket then the normal rpm dip (few dozen rpm) for electrical load may be exacerbated by large swings in fueling from incorrect maf signals when the closed loop fueling control is trying to chase a moving target.
Ah that’s very interesting. Yes I do believe they use the CEM (central electronics module). Certainly a commonly faulty module too. I think it’s currently up between MAF, CEM or Throttle body. Thanks for your input
Try disconnecting fuses to se if there is one connection that is problematic, understand your frustration. I had an Audi that left me with a sower taste, now I stick mostly to land rovers 😊
Dude - you are so close to me - JK is my mechanic when I cant figure it out .. LOL
You need to solder in a new contactless TPS in your original throttlebody.
i lost it when u rolled down the window and the car sounded like it wanted to just immediately die LMAO
arent cars so fun!
I had exactly same problem in my Mazda 626. It drops idle when it was super hot. I changed everything same like you did. And you know what? Ones I went to the trip to another country and there the problem had gone. Then, I went back home and problem had back also. I started thinking what has happend and I think the problem is in petrol. The country where I was has petrol without ethanol.
I had a rough idle on my S60R, did you check : MAF, Fuel Pressure sensor, fuel pump module? Youre so close dont give up
Fuel pressure is good. Maf is new :’)
Are all injector O rings OK? I had s similar issue in my R and it turned out to be an improperly seated injector. Also not a bad idea to ensure they are all flowing properly.
I was chasing a stumble upon stopping while rpm returned to idle for so long in my 04 SR… I checked vacuum leaks, maf throttle body, fuel pump, fuel fuel pressure sensor, 02 sensors, spark etc… same deal as you. Turned out an injector had decided to unseat itself slightly after reinstalling and driving for a couple weeks.
Also just curious - are you getting any hard starting only when the car is hot? Cold starts good, hot starts hesitate?
Also it could be a leaky valve if it’s exclusively just rough idle when warm.
Wait, I had the same issue on an S60 2004, first it was the idle, and then the car wouldn't start even after changing a few parts (there was a camshaft position sensor error), like the gas pump, and some of the camshaft sensors, in the end I ended up junking it.
Did you change the O2/Lambda sensors?
Mine only has a rough Idle when the engine is warming up.
Clean the mass airflow sensor or replace that possible
We need a video about the subie!
Coming up :)
Maybe airconditioning,try to pull out Electric connector In AC compressor
Have you already tried another battery. Sometimes a bad battery can cause strange issues eventhough you can still start the car with it.
Question? I have 2004 V70 codes P0343 and 0348 stalled while driving. simple Crank and Camshaft sensors or a WHOLE Engine?