Dan love your videos, I used to be very good at diagnosing and fixing problems with pretty much anything from cars to computers, electronics, been in the tech field all my life. Was injuried in a accident couple years ago and suffered a serious concussion and orthopedic issues that are permanent. I watch your videos and listen to your ways of diagnosis and repair to help me with my recovery thanks and continue your way of education thx
Dan you're the man. I viewed almost all your videos and learned so much. I love diagnostics and car mods. Unfortunately I have to make do with an entry level code reader, a home-made test lamp and a cheap multimeter. Please keep posting and diagnosing. I love your scope tool...
I recently got back from Europe, when i go back next year i would love to come visit you!!! i am from new jersey, USA. I am a HUGE fan!! Thank you soo much for what you teach!!
A quick check would have been to simply unplug the maf sensor. The engine would have ran on the default fuel table using tps and rpm points for fueling. I know Dan knows that. Just mentioning it for those who don't have a scope.
Thanks for explaining things the others didn't, I have been waiting a long time for a diagnostitan to put closed loop and O2 sensors into context. Thankyou.
Dan, I think you're the best 👌. You explain everything in detail and in that way we feel that we are doing the Diagnosis TOGETHER ❤ 💖 ♥. Thank you very much.
Hi Dan, another great diagnostic video where you found not 1 but two problems - and resolved them both. Always a joy to watch your vids Dan, please continue with them.
great job again. Diesel engines with EDC have the same issues,for example when no have turbo boost and no have dtc code, first check is the condition of MAP sensor.I fixed a lot of cars just after i clean the carbons and oil inside them. bravo Dan, continue with great videos. This is a very good example when one technician know the thing on the DNA level 😉. It is very important to know how to diagnose with scope.👍🏻👏
Thanks, Dan ! This time two faults, one of two O2 sensors busted (internal heater filament broken), and mass air sensor clogged with dirt (air filter ok ?) ! Diagnose Dan has fixed it again !!
That takes me back, too many parts fitters these days rely on fault codes. I had a 2.0 TFSi that was showing all sorts of boost fault codes. On the Skoda 2.0 TFSi the air filter box is held on by big rubber bungs. These bungs can become displaced when refitting the air filter cover and get sucked into the turbo! A really bad design fault. Once the chewed up bits of rubber were removed from the turbo, no more boost fault codes!
Another excellent case study. As I follow along I often pause the video and consider what I would do next. Although my first guess on listening to the engine was a plugged exhaust, the data pointed right at the MAF. As usual I didn't think of the other important cause, reduced fuel delivery from a weak pump, exposed when demand increases. In a way, this presentation is a crude reciprocal of a vac leak, in this case going lean at WOT, with secondary compensation. Thank you for walking us through another useful learning experience.
Excellent video Dan, one note to viewers, this is a clear case of uneven revving around 4000 rpm, newer engines, for example VAG engines are rev limited at full throttle while you’re parked or standing still. Don’t confuse the two situations. I have a 1.4TSI which sticks to 3500 rpm at full throttle, but even running.
It is the same phenomenon with my car.It would not rev beyond 4000 rpm unloaded with no gear engaged.It is a 3 cylinder and this is a security measure against any critical vibrations above resonant frequency.Very simple.
Greetings from the Czech Republic, owner of the same car here (just with manual transmission). I stumbled upon this video just by an accident but I am thankful for that. May I have a suggestion? Add the brand/model + engine code to the description of the video so that it can be found by other Previa/Estima/Tarago ACR3O owners :)
DiagnoseDan fixed it again! I like to inspect and clean the MAF every time the air filter is replaced as a preventative measure. Many shops would never be bothered with this simple but important maintenance measure.
hello dan,first i wanna thank you for your good work!I have a passat b5.5 1.9 130 hp, it has 137 km real km, the first key in the morning the engine is galloping, shaking and gives a blue smoke . if I have a consumer, start the climate for example before giving the key everything works ok In the cold season it's all ok that's because so, I have consumers! I replaced g62 oem,no fault codes,scanned whit oem interface.thank you
Again god job sr I like to see this kind of problems on a vehicle that some times can cause a headache but on your hands look very easy well explained another lesson to my list thank you mister thumps up
Thanks Dan ! Since the garage replaced starter motor and crankshaft timing pinion the car cranking better and timing sync and fuel pressure ok . Just hope recoding the injector solves the problem . No other fault codes just P062B (downloading/configuration fault) appear Twice on the ecu global scan of The Peugeot Diagbox software .
A great lesson on how to use live data and monitor the oxygen sensors and the speed sensor to show the reason for the ineffective operation of this car.. In our country (iraq), the air mass flow sensor often gets dirty due to the dusty weather. Thanks Dan! Eng. Mansor..
@@Diagnosedan i have a low cost oscilloscope hantek 1008c .i am following your great knowledge ,it is really working great.very soon i will be also your teacher .thanks man cheers
i know this was just for video. but Im guessing as soon as you revved it up you knew it was a bad air meter. I did. :) lots of years in the business. great videos though. learning a lot about bus systems from you. Thank you!
Hi Dan latest : yes there is fuel supply and cam crank sync is there . Now I have P062B (programming of the injectors not done ) I did parameter measurements through Diagbox software and the injector 1 is showing 00000 as classification code . Engine is cranking better thanks to new starter motor but not starting . No other fault codes .
I was doing this back in the 80's and tbh you guys have it made now. Our diagnostic tools weren't nearly as good so you had to know the basics and that was always our mantra, remember the basics and what it takes to make a simple engine run. Anyway, we would write the codes down, clear, and road test the car and see if anything set. (Back then there was no short/long term code difference. Get a late 80's or early 90's elec FI car with a computer and no obd 1 or 2 in it and see how fun that can be.
Thank you so Much Dan! I learned a great tip on reading wide band o2 sensor's from this video. I have always struggled with deciphering data. Now I understand what the Ratio Lambda means. Thank you. I am new to your channel and I am very impressed!
First off awesome job, I wanted to say that the test of the 02 sensor heater circuit was great. Sometimes I forget that wideband sensors use them too. I liked the use of the scope in circuit testing the maf, I personally like using the calculated engine load % to find dirty mafs. Toyota needs 90% minimum on wide open throttle. Then I would break out the scope. Anyway! Great job!
Thanks Dan this video was very helpful! I have been having some of the same problems with my 2003 BMW 325 XI , I wasn't sure what to look for on the fuel trims after studying for about two weeks but after watching your videos I have a better understanding 😃.
You are wery good at explaining things, really good channel to just get more knowledge about car diagnosis. Only bad thing now is that i have watched allmost all the videos :D Also ppl needs mecnanics like this, the ones that really know their stuff. 1H at dan is probably better than ~3h at average dealer.
Hi sorry Dan ! No comma from me for a long time . My peugeot 5008 1.6 rudimentary is running on 3 injectors and because I have used my downloaded version of the peugeot DIAGBOX windows 7 software too many times to clear the fault codes at various repair stages , now I am getting error messages . The whole engine was overhauled(new camshaft , skimmed old cylinder head , new injector seals and sleeves, new gasket , new crankshaft magnet ring , water pump all professionally fitted and torqued ) . My question is if either I programme the non firing injector with my software and if it works then also if there are still error messages popping up because of the fault code storing memory is full , I will have to take the car to the peugeot dealers to remap( whole software update ) the ecu any any other things need to be done . Please kindly advice me if this is the way to go ? Thank you so much and I wish you late Christmas greetings and a very happy new year . I have been ill since April this year and could not do much with my car . Just waiting to get better myself and for a better weather !!
Dan you are a damn top diagnosis technician, i am blessed discovering you in my attempt path to learn more about car diagnostics. Keep up the good work 💪
thank you for showing us what a dirty MAF does to engine controls (crazy fuel trims) - Also funny how a L4 engine gets 2x O2/lambda sensors like V6/8 engines (I guess it helps the monitoring software sanitize 1 sensor data against the 2nd upstream sensor sensor)
You would think that the aux heating or the O2 sensor would not be needed once the car reaches normal operating temperature. At 600 degrees, the O2 sensor should work normally. Another thing, the scanner should give you the status of the fuel pressure and MAP sensor voltage. Just check them and see, no need to manual test at the sensor location.
I'm pretty sure you mean Maf and not Map😜 Using a scope and measure at the component is more reliable than looking at scandata. Some scanners even give you a default reading when the component is unplugged. The scandata is processed data and could be false when for Example you have a resistance in a wire. This is what seperates the Professional from the Diy.
Great advice never trust the scanner! based on the data i would have for sure checked the MAF first. I thought the MAF over calculates off idle and under calculates on idle. The STFT did not show that at idle but you could for sure see the difference at high RPM. You should have seen a positive STFT at idle based on theory.
Dan, this is really good stuff! I would like to recommend something which would help me and other DIY amateurs: It would help if you explain some of your thought processes in diagnosing, such as why you decided to check the MAF, and the other system you decided needed to be checked if the MAF was not the problem. Thanks!
caduceus33 In the fuel trim we could see the engine was running lean. So this means we are not getting enoug fuel, or to much air. Because the engine was not lean at idle, this was not an airleak. So only not enough fuel remains. So the engine was thinking less air was comming in ( mass air meter) or there was not enough fuel comming out of the injectors(fuel pressure) So the next thing i would have tested would have been the fuel pressure😉
Excellent video. Thank you. I found you because I noticed that Rob ( One Auto youtube channel) has subscribed to your channel recently. Another bonus is that I'm learning some Dutch words by reading your scan tool - for example "Korte" means short, though I doubt whether I can pronounce the word correctly.
Dan I am very impressed by your systematic methods of approaching a problem with a system in this case an automobile. I have a question for you about my E31 1991 OBC which is in the center console just below the AC center vents. This car has always been serviced by BMW authorized dealer. This OBC in the dash has been loosing pixels from the LED display. It is a known issue with BMW. I have considered taking the box apart but I do not want to make this problem worse, The car is not OBD2, it is the OBD2 system with the round bayonet connector located in the right front of the engine bay behind the pop up headlight. I have owned the BMW for 13 years, the dealer recently looked at the drivers seat bottom has just recently started twisting to the right when I attempted to move it back. I have searched youtube for help and have concluded that the 1991 850i has cables (much like a speedometer cable) that needs to be examined. Some of the fixes are to cut the cable housing so that the square end of the inner steel cable can engage the gearbox. The dealer does not want to touch this problem, I understand. The technicians of that era are retired or deceased. I am looking for options for maintaining this beautiful Calypso Red 850i which has been driven 67000 miles. It's beautiful, when I take to the AD it will draw a crowd. Young BMW salesman thought it was a new model, he should be taught about the BMW history. People have told me that the E31's are full of electrical problems, but I have had very few. Keep the batteries charged and the ground wires clean and tight and the car has been a joy to drive. In today's car world this is simple. I also own a VW derived W12 that I have owned for a number of years and have had no problems except with the TPMS pcm. I kept the old part and I wish I could find someone like you Sir who takes a methodical and systematic approach to solving problems. I am a retired professional engineer (pwr generation), and you should be a teacher, which, I guess you are, because this old man is still learning. Thank you so much for your time and effort to make these videos Professor Dan !!!
Awesome video Diag Dan, great Information on MAF's, STFT, LTFT, Widebands, and using Lambda. I have ran into a couple VW 2.0 TSI Turbocharged engines that were both setting false MAF performance codes as well as having very high Fuel Trims (lean cond) under high rpms, both with cracked intercoolers! I know that this is not the case here, just thought I'd share that information with you and others. Just wondering if you have seen similar problems like this with those European models you seem to work on over there? I love your channel, learning new stuff outside of American helps tremendously!
Sorry also with ignition on there is no fuel coming to the filter injection ecu just reading the fuel pressure 350 bar initially in the rail does not let anything else happen because no fuel feed ( it is an 8v DV6C with eolys additive system . )
Two things intrigued me - can you provide some explanation? 1) sound of the engine souded too harsh, compared to my car. Was the exhaust OK? 2) ECU was not able to detect the open circuit in the upstream O2 sensor - I believe there is a dedicated DTC for that
That was one crusty MAF. Good video.. I was thinking fuel pressure. I guess it's a toss up which to check first (unless you had a reason to go to the MAF?).
Terrific work Dan!....what kind of cleaner doyou use because I was told to never to try to clean a mass meter....it could result in more damage. Thanks your response
Great video. I didn;t know those toyota 4-wire O2 sensors are wideband ones. Since the car could not rev at maximum, why did you expected an almost maximum value from the MAF sensor. Does it flat-out after an RPM value?
Another great video Dan. I really enjoy your videos. There is a lot of learning in them. I’ve always struggled somewhat with the correct way to check an air mass meter. In this video when you reved the car the Air mass didn’t reach where it should be and it was because the AirMass was dirty but what if it was a fuel pressure issue that was causing the engine not to rev. If the engine isn’t Reving fully would that not lead to a low Air Mass signal also?
Tom OConnor The best way for remembering is repetition. So use your tools available as much as you can. And do as much diagnoses as possible. And keep thinking about what you are doing.😁
Dan love your videos, I used to be very good at diagnosing and fixing problems with pretty much anything from cars to computers, electronics, been in the tech field all my life. Was injuried in a accident couple years ago and suffered a serious concussion and orthopedic issues that are permanent. I watch your videos and listen to your ways of diagnosis and repair to help me with my recovery thanks and continue your way of education thx
People need to be educated that’s a fault code is a symptom and not a diagnosis. Good job as always 👍🏻
Methodical approach to problem solving. Knows where to get data and how to interpret it. I love it. Keep up the great videos.
Thanks John 👍👍
Greatest channel on earth. DiagnoseDan fixed it again, together. Points finger at screen. Fantastic.
This really does show your prowess in your line of trade, thank you Dan for everything you’re doing, helping us to learn more.
Dan you're the man. I viewed almost all your videos and learned so much. I love diagnostics and car mods. Unfortunately I have to make do with an entry level code reader, a home-made test lamp and a cheap multimeter. Please keep posting and diagnosing. I love your scope tool...
I recently got back from Europe, when i go back next year i would love to come visit you!!! i am from new jersey, USA. I am a HUGE fan!! Thank you soo much for what you teach!!
Rene Mejia Wow thanks!🤩
A quick check would have been to simply unplug the maf sensor. The engine would have ran on the default fuel table using tps and rpm points for fueling.
I know Dan knows that. Just mentioning it for those who don't have a scope.
Thanks James
Thank you
Don't Retire! We need you.
Thanks for explaining things the others didn't, I have been waiting a long time for a diagnostitan to put closed loop and O2 sensors into context. Thankyou.
Dan, I think you're the best 👌. You explain everything in detail and in that way we feel that we are doing the Diagnosis TOGETHER ❤ 💖 ♥.
Thank you very much.
Dude🙌 you are the Champion 🏆. 👍
🤣🤣👍
Wouldn't call Dan a 'dude' (he's not a teenager, and he's not dressed like a city slick dandy) more like a mate, buddy, pal or chum ?!
@@juerbert1 😜
Hi Dan, another great diagnostic video where you found not 1 but two problems - and resolved them both. Always a joy to watch your vids Dan, please continue with them.
Thanks David
great job again.
Diesel engines with EDC have the same issues,for example when no have turbo boost and no have dtc code, first check is the condition of MAP sensor.I fixed a lot of cars just after i clean the carbons and oil inside them.
bravo Dan, continue with great videos.
This is a very good example when one technician know the thing on the DNA level 😉. It is very important to know how to diagnose with scope.👍🏻👏
You are Officially KING DIAGNOSE DAN. You are such a great guy. Not a mechanic just, you are an Engineer
Thanks, Dan !
This time two faults, one of two O2 sensors busted (internal heater filament broken), and mass air sensor clogged with dirt (air filter ok ?) !
Diagnose Dan has fixed it again !!
See you next time!🤣🤣
Thanks for this excellent lesson in common sense diagnostic procedure, and thanks for being very fluent in English.
Good to see you back sir. I was wondering what happened to you. It's always good to see master at work. Cheers.
i have been very bussy, Thank you
That takes me back, too many parts fitters these days rely on fault codes. I had a 2.0 TFSi that was showing all sorts of boost fault codes. On the Skoda 2.0 TFSi the air filter box is held on by big rubber bungs. These bungs can become displaced when refitting the air filter cover and get sucked into the turbo! A really bad design fault. Once the chewed up bits of rubber were removed from the turbo, no more boost fault codes!
Another excellent case study. As I follow along I often pause the video and consider what I would do next. Although my first guess on listening to the engine was a plugged exhaust, the data pointed right at the MAF. As usual I didn't think of the other important cause, reduced fuel delivery from a weak pump, exposed when demand increases. In a way, this presentation is a crude reciprocal of a vac leak, in this case going lean at WOT, with secondary compensation. Thank you for walking us through another useful learning experience.
Excellent video Dan, one note to viewers, this is a clear case of uneven revving around 4000 rpm, newer engines, for example VAG engines are rev limited at full throttle while you’re parked or standing still. Don’t confuse the two situations. I have a 1.4TSI which sticks to 3500 rpm at full throttle, but even running.
It is the same phenomenon with my car.It would not rev beyond 4000 rpm unloaded with no gear engaged.It is a 3 cylinder and this is a security measure against any critical vibrations above resonant frequency.Very simple.
Thank you very much for spending time preparing those videos. Finally start understanding more about how car system works
That's great Emil!
Greetings from the Czech Republic, owner of the same car here (just with manual transmission). I stumbled upon this video just by an accident but I am thankful for that. May I have a suggestion? Add the brand/model + engine code to the description of the video so that it can be found by other Previa/Estima/Tarago ACR3O owners :)
DiagnoseDan fixed it again! I like to inspect and clean the MAF every time the air filter is replaced as a preventative measure. Many shops would never be bothered with this simple but important maintenance measure.
DJ R Thats what separates you from the rest!
Awesome! Diagnosing and fixing a car without using fault codes or changing any parts!
Argeny Sandoval 😁
hello dan,first i wanna thank you for your good work!I have a passat b5.5 1.9 130 hp, it has 137 km real km, the first key in the morning the engine is galloping, shaking and gives a blue smoke . if I have a consumer, start the climate for example before giving the key everything works ok In the cold season it's all ok that's because so, I have consumers! I replaced g62 oem,no fault codes,scanned whit oem interface.thank you
Again god job sr I like to see this kind of problems on a vehicle that some times can cause a headache but on your hands look very easy well explained another lesson to my list thank you mister thumps up
Thanks for the thumbs up!
U the man ur diagnostics is one of the best that I ever seen always on point 🎉❤
Thanks Dan ! Since the garage replaced starter motor and crankshaft timing pinion the car cranking better and timing sync and fuel pressure ok . Just hope recoding the injector solves the problem . No other fault codes just P062B (downloading/configuration fault) appear Twice on the ecu global scan of The Peugeot Diagbox software .
Excellent teaching and presentation skill. Thanks Dan.
I like this video a lot and have been watching some of the videos over and over.
Thanks Dan for making me a better mec.
Love you sir ❤ your my best teacher on TH-cam ❤❤❤
Learned something new again by watching this video.... You are very good ..THanks for sharing your knowledge.
A great lesson on how to use live data and monitor the oxygen sensors and the speed sensor to show the reason for the ineffective operation of this car.. In our country (iraq), the air mass flow sensor often gets dirty due to the dusty weather.
Thanks Dan!
Eng. Mansor..
DiagnoseDan one of the best video ever ,great well done.from zimbabwe africa
Thank you!
@@Diagnosedan i have a low cost oscilloscope hantek 1008c .i am following your great knowledge ,it is really working great.very soon i will be also your teacher .thanks man cheers
i know this was just for video. but Im guessing as soon as you revved it up you knew it was a bad air meter. I did. :) lots of years in the business. great videos though. learning a lot about bus systems from you. Thank you!
Great comment! Thank you👍
Hi Dan latest : yes there is fuel supply and cam crank sync is there . Now I have P062B (programming of the injectors not done ) I did parameter measurements through Diagbox software and the injector 1 is showing 00000 as classification code . Engine is cranking better thanks to new starter motor but not starting . No other fault codes .
I was doing this back in the 80's and tbh you guys have it made now. Our diagnostic tools weren't nearly as good so you had to know the basics and that was always our mantra, remember the basics and what it takes to make a simple engine run. Anyway, we would write the codes down, clear, and road test the car and see if anything set. (Back then there was no short/long term code difference. Get a late 80's or early 90's elec FI car with a computer and no obd 1 or 2 in it and see how fun that can be.
I know, i have been there🤣🤣
Thank you so Much Dan! I learned a great tip on reading wide band o2 sensor's from this video. I have always struggled with deciphering data. Now I understand what the Ratio Lambda means. Thank you. I am new to your channel and I am very impressed!
Welcome, great to have you here!
You are a genius sir thanks I have learned a lot from you... May GOD bless you
Thank you😊👍
First off awesome job, I wanted to say that the test of the 02 sensor heater circuit was great. Sometimes I forget that wideband sensors use them too. I liked the use of the scope in circuit testing the maf, I personally like using the calculated engine load % to find dirty mafs. Toyota needs 90% minimum on wide open throttle. Then I would break out the scope. Anyway! Great job!
Thanks Cody!
Those heaters are critical to A/F sensors, they won't work without it. Learned that a year ago myself.
Very very nice videoes Dan,first of all my thumb up and than watch the video,thank u Dan,a peace from Chechnya)
Thanks!
Thanks Dan this video was very helpful! I have been having some of the same problems with my 2003 BMW 325 XI , I wasn't sure what to look for on the fuel trims after studying for about two weeks but after watching your videos I have a better understanding 😃.
You are wery good at explaining things, really good channel to just get more knowledge about car diagnosis.
Only bad thing now is that i have watched allmost all the videos :D
Also ppl needs mecnanics like this, the ones that really know their stuff. 1H at dan is probably better than ~3h at average dealer.
Thanks!😊
You do like revving it higher, don't you :D :D I've never seen such a detailed videos on youtube, great channel!
😊😊👍
Amazing analyzing skills, Love your methods.
Nice watching you fix these cars
Fantastic Dan thank you . I will do that and let you know the outcome .
Hi sorry Dan ! No comma from me for a long time . My peugeot 5008 1.6 rudimentary is running on 3 injectors and because I have used my downloaded version of the peugeot DIAGBOX windows 7 software too many times to clear the fault codes at various repair stages , now I am getting error messages . The whole engine was overhauled(new camshaft , skimmed old cylinder head , new injector seals and sleeves, new gasket , new crankshaft magnet ring , water pump all professionally fitted and torqued ) . My question is if either I programme the non firing injector with my software and if it works then also if there are still error messages popping up because of the fault code storing memory is full , I will have to take the car to the peugeot dealers to remap( whole software update ) the ecu any any other things need to be done . Please kindly advice me if this is the way to go ? Thank you so much and I wish you late Christmas greetings and a very happy new year . I have been ill since April this year and could not do much with my car . Just waiting to get better myself and for a better weather !!
That explanation was really good.
Dan you are a damn top diagnosis technician, i am blessed discovering you in my attempt path to learn more about car diagnostics. Keep up the good work 💪
You deserve way more subscribers man..
Ahmed Sharif Thanks!!!!😁
Indeed, unlike the other goons' channels who have zillions subscribers while their content is not as useful as Da's content
thank you for showing us what a dirty MAF does to engine controls (crazy fuel trims) - Also funny how a L4 engine gets 2x O2/lambda sensors like V6/8 engines
(I guess it helps the monitoring software sanitize 1 sensor data against the 2nd upstream sensor sensor)
This video was the frist video that I watched from your channel , you are amazing. . I will follow your channel definitely
Thank you!
Note : a split in the radiator top tank at 5.31
😱
Good eyes! I was watching Dan remove the connectors and the (turned off) meter.
mr dan am very happy knowing that you going to have classes about scope, please keep me notified!!!!
Sure! If you Subscribe and hit the notifications bell, you'll get a notification when i upload a new video!
DiagnoseDan is there already videos about the scope? Or whats the when to start?
@@0310692011 yes there are video's using the scope and more coming.
Good, systematic approach.
Thanks Drick!
You would think that the aux heating or the O2 sensor would not be needed once the car reaches normal operating temperature. At 600 degrees, the O2 sensor should work normally. Another thing, the scanner should give you the status of the fuel pressure and MAP sensor voltage. Just check them and see, no need to manual test at the sensor location.
I'm pretty sure you mean Maf and not Map😜 Using a scope and measure at the component is more reliable than looking at scandata. Some scanners even give you a default reading when the component is unplugged. The scandata is processed data and could be false when for Example you have a resistance in a wire.
This is what seperates the Professional from the Diy.
Great advice never trust the scanner! based on the data i would have for sure checked the MAF first. I thought the MAF over calculates off idle and under calculates on idle. The STFT did not show that at idle but you could for sure see the difference at high RPM. You should have seen a positive STFT at idle based on theory.
Dan, this is really good stuff! I would like to recommend something which would help me and other DIY amateurs: It would help if you explain some of your thought processes in diagnosing, such as why you decided to check the MAF, and the other system you decided needed to be checked if the MAF was not the problem. Thanks!
caduceus33 In the fuel trim we could see the engine was running lean.
So this means we are not getting enoug fuel, or to much air.
Because the engine was not lean at idle, this was not an airleak.
So only not enough fuel remains.
So the engine was thinking less air was comming in ( mass air meter)
or there was not enough fuel comming out of the injectors(fuel pressure)
So the next thing i would have tested would have been the fuel pressure😉
Thanks Dan, that makes a lot of sense!
I have to say mate, one like is not enough for this video!
Dan, guru big time. Thanks
🤣🤣😉
i love to whach yor videos you are very good teacher thanks dan.
Thanks for the kind words!
Excellent video. Thank you. I found you because I noticed that Rob ( One Auto youtube channel) has subscribed to your channel recently. Another bonus is that I'm learning some Dutch words by reading your scan tool - for example "Korte" means short, though I doubt whether I can pronounce the word correctly.
Thank you for Watching, but if you want to learn Dutch there are better channels.😂
🇳🇱🧀⚘
theres also Google Translate and Lynda.com
Salute Sir. Greetings from Bangladesh.
Tanks Dan I learn
a lot from
your channel.. 😇
I love that type of MAF.. They have earned me some good diagnostic fees over the years. No parts required 👍
Yep, these oldschool ones are easy💷💶
Great stuff Dan , new sub here , good diag , if Robs here im in too :)
chris90 thanks for Subscribing!
Rob's a great guy!
Ditto...
Dan I am very impressed by your systematic methods of approaching a problem with a system in this case an automobile. I have a question for you about my E31 1991 OBC which is in the center console just below the AC center vents. This car has always been serviced by BMW authorized
dealer. This OBC in the dash has been loosing pixels from the LED display. It is a known issue with BMW. I have considered taking the box apart but I do not want to make this problem worse, The car is not OBD2, it is the OBD2 system with the round bayonet connector located in the right front of the engine bay behind the pop up headlight. I have owned the BMW for 13 years, the dealer recently looked at the drivers seat bottom has just recently started twisting to the right when I attempted to move it back. I have searched youtube for help and have concluded that the 1991 850i has cables (much like a speedometer cable) that needs to be examined. Some of the fixes are to cut the cable housing so that the square end of the inner steel cable can engage the gearbox. The dealer does not want to touch this problem, I understand. The technicians of that era are retired or deceased. I am looking for options for maintaining this beautiful Calypso Red 850i which has been driven 67000 miles. It's beautiful, when I take to the AD it will draw a crowd. Young BMW salesman thought it was a new model, he should be taught about the BMW history. People have told me that the E31's are full of electrical problems, but I have had very few. Keep the batteries charged and the ground wires clean and tight and the car has been a joy to drive. In today's car world this is simple. I also own a VW derived W12 that I have owned for a number of years and have had no problems except with the TPMS pcm. I kept the old part and I wish I could find someone like you Sir who takes a methodical and systematic approach to solving problems. I am a retired professional engineer (pwr generation), and you should be a teacher, which, I guess you are, because this old man is still learning. Thank you so much for your time and effort to make these videos Professor Dan !!!
Another great and informative video.
Thank you!👍
You use an exceptional tool (snap-on), but for diagnostics, it's still the best OEM diagnostic tool
True but than you need to Have so many scantools!
Understanding live data is also important you can tell whats wrong faster especially when the problem has to do with engine performance
Awesome video Diag Dan, great Information on MAF's, STFT, LTFT, Widebands, and using Lambda.
I have ran into a couple VW 2.0 TSI Turbocharged engines that were both setting false MAF performance codes as well as having very high Fuel Trims (lean cond) under high rpms, both with cracked intercoolers! I know that this is not the case here, just thought I'd share that information with you and others.
Just wondering if you have seen similar problems like this with those European models you seem to work on over there?
I love your channel, learning new stuff outside of American helps tremendously!
It seems we have the same problems everywhere! Thanks for watching!
very very very proffesionel, i'm from algeria thanks
Gharbi Mecatronicien Thank you!
Sorry also with ignition on there is no fuel coming to the filter injection ecu just reading the fuel pressure 350 bar initially in the rail does not let anything else happen because no fuel feed ( it is an 8v DV6C with eolys additive system . )
Well done!
dlugas251 Thank you💪👍
Just seen this video. Great work. Please post more videos. Thanks again.
Nice job on that maf!
After watching your second video - subscribed for sure. Tnx for sharing useful advice!
Thanks for Subscribing!😊
Awesome job Sir
Thanks Steven!
Diagnose Dan is the Man!
I have learn all lots from you my brother
Dan,you are the man......
Wat leuk, Toyota Previa. Ik heb er een, en het geeft onderzoek nodig om een diagnose te kunnen stellen!
i have to say the music its inspiring like I'm ready to learn... excellent job dan. keep up👍
DAN THE MAN ... you the best Bro... love those videos
Ha ha Thanks Mike!👍
Two things intrigued me - can you provide some explanation?
1) sound of the engine souded too harsh, compared to my car. Was the exhaust OK?
2) ECU was not able to detect the open circuit in the upstream O2 sensor - I believe there is a dedicated DTC for that
It should end “diagnose Dan is the man!”
That was one crusty MAF. Good video.. I was thinking fuel pressure. I guess it's a toss up which to check first (unless you had a reason to go to the MAF?).
What made you decide to go for MAF first & not fuel pressure? Thx for the video, love it!
Can't remember🤣🤣 This video was some time ago i would have to watch the video. Sorry for the late reaction😊
True mechanic Dan is loves high RPM
😉
Good job keep it up sir,i am new to your channel,but to be honest with you I really love your explanation abt how to diagnosis a car.
That's Great, Thank you!
watched them all... great videos! Keep them coming!
Thanx for watching MrBorntoroll !
Terrific work Dan!....what kind of cleaner doyou use because I was told to never to try to clean a mass meter....it could result in more damage. Thanks your response
Good job and lesson. Thank you.
Great video. I didn;t know those toyota 4-wire O2 sensors are wideband ones. Since the car could not rev at maximum, why did you expected an almost maximum value from the MAF sensor. Does it flat-out after an RPM value?
OK, I just noticed the the RPM value was almost 6000 RPM, so the almost 5 volts is expected from the MAF.
Another great video Dan. I really enjoy your videos. There is a lot of learning in them. I’ve always struggled somewhat with the correct way to check an air mass meter. In this video when you reved the car the Air mass didn’t reach where it should be and it was because the AirMass was dirty but what if it was a fuel pressure issue that was causing the engine not to rev. If the engine isn’t Reving fully would that not lead to a low Air Mass signal also?
Thank you sir this is so helpful
I appreciate you hard work 🙂
A RAHMAN Thanks!
Your videos are professionals. Congratulations .where are you from master??????.
Thank you Sir! I'm from Holland.
DiagnoseDan thank you for sharing your knowledge god bless you.
Excellent Dan,I really enjoyed this one 👍🏻
Thanks Steve!
Will need to take notes on the methods that you are using to evaluate faults.
Tom OConnor The best way for remembering is repetition.
So use your tools available as much as you can. And do as much diagnoses as possible.
And keep thinking about what you are doing.😁
Fantastic. Mine at high speed it runs rich ful mixture. The exhaust becomes black fast