Let me guess Dan You've uploaded the video twice because of copy right Warning of the music that playd in your shop , and that's why you cut the audio 😁 ?
Also a issue for the Ford Focus mk3 ST (250) ecoboost, I fitted a mishimoto oil separator catch can, not a cure of it, but to help prevent less carbon build up, til a valve health check and clean
@Sam S "I don't think it's overkill" and then "I probably wouldn't wrapped it up as tight" and then "to each their own"... Hey Sam S, if you look under %100 of people cars on the road, there debris everywhere. That wrapping had to have been done to appease the internet perfectionist
Hey Dan, Great video as always. FYI, we used GM Top Engine Clean in our Lexus engines to remove this carbon buildup in the IS250 V6 engines. The trick was to get the engine very hot then remove the intake while it was still hot, then pour the bottles' measured amount into each port except the one that had the valves open. We used a small scrubber made of a handful of ZIP ties (zip tied together) then gently scrubbed the intake valves for about two and a half minuets. After, we sucked the fluid out then sprayed carburetor spray to finish the cleaning process then finally sprayed WD40 to help neutralize the chemicals used. The last step was to turn the crank and clean out the last cylinder using the same procedure. The total time to complete the service was about two to two and a half hours. I think the pellet and vacuum system you demonstrated might be the best way to clean these valves because there are no harsh chemicals and the engine can be cold. One last thing, we noticed that the V6 engines with a manual transmission never developed carbon buildup. Perhaps the higher RPM's prevented any carbon misfire issues? Thanks again for a great video!
In my 43 years in the motor trade I can say most of the claims on all products that flush, clean or stop leaks or give better gas mileage are very exsagerated most of them cause additional symptoms or problems later on
Wow that Revive turbo cleaner worked quite well. This is the only video I've found where someone shows with an actual borescope the before and after results. I think using this or any other water-based non caustic, non flammable, and non corrosive degreaser and using it as a regular preventative maintenance would definitely see positive results. The thing is most people wait until the problem gets bad to try these products out. I can definitely see in the video that a lot of the accumulated gunk was removed with just 1 treatment.
the tsi engine also suffers from soft valve guides, i had a seat leon 1.6 with low rpm missfires, the valves float and loose compression. another great vid dan, the carbon build up was strong in this engine.
@@lgtweewielers interesting but i have never seen that happen, the guides would have to be undersized fitting in the head for that to happen i would think.
Wow, what a superb video! I have exactly this problem on a VW 1.4TSI engine - misfires terribly when cold but goes after a few minutes. I thought it was just my car. This video nailed it and I will at least give some proprietary chemicals a go before looking into something more drastic (likely sell the car). Thanks for your efforts making the video.
Thanks for the quality of your videos and the thorough explanations. I teach high school automotive courses, and your videos are becoming a vital resource. It's also a bonus that you keep your dialogue "family friendly"! Subscribed!
Such a helpful channel! 2013 Tiguan and my engine started misfiring in the cold weather, while in park and stationary was the worst of it. This is so helpful when it comes to communication with my mechanic. 💯
Did you get the blasting procedure done on your Tiguan? I have a 2013 Eos with the 2.0 TSI. At around 65,000 miles it was running a little rougher than normal and the gas mileage was lower as well. Went and had the walnut blasting done and it is like driving a different car! Runs so smoothly that it cant even be felt through the steering wheel and improved mileage. It's somewhat expensive but only has to be done every 65-75,000 miles. Hope your Tiggy is going strong!
@@markb3756 getting it done soon, I have to get my Tiguan towed 220+ miles to Salt Lake for the nearest VW person to do it. Worst part about moving to the countryside. Nobody wants to touch a VW.
Great video as always but I turned my volume all the way up thinking that something is wrong and nearly crapped myself after Dan started talking after all the silence near the end 🤣
Phenomenal tutorial! First time I’ve seen blasting media that can be dissolved; pretty clever. Also the first time I’ve seen a cleaned valve get dirty again so quickly after being cleaned.
Hi From Canada, thanks for this informative video regarding direct injection carbon buildup. We appreciate if you could give us more details about the blaster system that you have used and the media (chemical solutions). Best Regards
Toyota have been using direct and port injection since the mid 2000's to overcome this problem (Lexus V6 comes to mind). A combination of direct and port is the way to go in my opinion. This is a huge problem with VAG and BM's, stating the bleeding obvious. Great explantion Dan.
Dan you are the best teacher I've seen on diagnostic, this video was very help full as many of us still believe that these engines runs perfectly, it's shows clearly the need of a regular cleaning. Thanks again cheers Charles
How is spraying in intake filter box fall into "after MAF"?Am not expert but what i know about engines gas and diesels, MAF sensor is after intake filter and if you spray anything in intake filter box beside MAF cleaning solution, MAF will go bad in some time.Dont gave me wrong i dont want bashing and shiting on your channel. I love this channel and learned alot watching thru yours working and explaining.
Ah emission controls, got to wonder if over the whole life of a car they actually save anything - at some point it all still comes out the exhaust, or results in co2 dump cause the car gets scrapped early. Grumble.
Haha watch the vid about the problem retrofitting cats and dpfs on school buses in California has caused. Haha to clean em out they back em up to the property line and let em go into Regen mode , blowing ash and all kinds of crap all over. There was a whole bunch of vids a few years back on how carb is basically putting people out of business and costing everyone alot of money and we aren't seeing any benefits
Well impressive. Pretty unusual to find a mechanic who understands the technical side of engine operation and design to the extent you have explained in this video! Great stuff. Need to have a look to see if you have a video about Tsi engines that 'hiccup' when transitioning from low load to high load at mid rpm (e.g. going onto a steep incline, or heavish acceleration).
Blimey looked like you was carrying out liposuction on that engine😂😂😂 That’s the first case of open engine surgery I’ve seen carried out live on you tube 😉 We use tunap at my dealership it’s the recommended solution MB approve, I do like it although it is labour intensive as you stated. My personal take on carbon build up on valves is to change the oil at more regular intervals to prevent old dirty sticky oil mist from pcv contaminating the valve stems. I flush & change the oil on my direct injection mercedes engine every 6 months ( being in London & encountering long times at idle in traffic) & haven’t suffered any large carbon build up although there will always be some residue due to fuel no longer being sprayed onto the back of the valves & cleaning them. As always a good video sound quality asides, keep em coming 👍😀😀😀
Kind of goes without saying but for those DIYers out there, make sure the ports/valves being blasted are COMPLETELY CLOSED. Another great video dan. I seem to get a lot of problem with injectors leaking overnight, wetting the spark plugs, also on BMW's
Ah it's finally out. I remember when we spoke about this lol who knew it would take so long to get a carbon buildup situation to film. I'm still waiting for mine 😆😆 great video Dan
At least it's not a Ford Ecoboost. They recommend no chemical cleaning or manual scraping because it can cause damage. Replace parts ....like heads , intakes , turbos ....haha what a joke so at least a vw is better in that respect.
Thank You for yet another excellent video, Dan. When I was watching the part where you had used the chemical, and said , that it did not work as you had expected, I thought, that perhaps you could just use a couple more bottles of it - say, 3 bottles in total. From the video it looked like it did remove, at least, a half of the original amount of the build-up. So, the natural question comes, "Why didn't you just keep at it"? Just a thought... ... I use the CRC GDI Intake Valve Cleaner, here, in the U.S. and, to be honest, it works great for me. I do feel a better response from the engine after a cleaning, and do it periodically, once a year, or so.
Me too. Although the miss fire has got better after thrashing the thing lol. Bit like a 2 stroke bike, ride like a poof it gets serious carbon build up and slows down, wring it's neck and retain a healthy engine.
I'm following car and motorcycle engines since air cooled, push rods, carbies and points. OHC....ok, fuel injected....ok, electronic ignition....ok but then the bullshit started with emission control and trying to squeeze out more efficiency out of engines which have 20-30 % efficiency only to start with. Super expensive to repair and costing the owner much more than paying a bit more for fuel during the lifetime of the vehicle. So I kept using Newtimer cars and one fine day soon i will jump to electrics. I get to drive a Tesla for long distance trips occasionally and i know they have their own set of problems. But they are very convincing and definitely the future (I mean electrics in general). Dan, you're an absolute legend and every new video from you makes be feel like a kid at Christmas.
I think the real problem here is the quality control off the car manufacturer. Why is it that VW didn't discover all the problems with the TSI engine during the testing fase and why is it that they get away with the customers paying the bill for there poor design and quality. But people keep on buying these cars and keep on paying for poor design and quality.
It was great to see you have respect and use the fender and nose covers on the car. I’ve mentioned this to other YT mechanics but they continue to go without them. When I was a mechanic it was mandatory to do this as well as cover the seat and floor and also no belt buckle.
I didn't heard you mentioning EGR valve. When engine runs on lean-mode it produces lots of carbon! At same time engine runs on almost closed throttle, which gives a lots of pumping losses. That's why EGR valve opens and helping to decrease pumping losses. And that's why all carbon goes back to intake valves. And if you mix all of carbon with oily steam from crank hause ventilation you get all that you saw on boroscope!!
Great educational video as usual :) What does the cat think about these chemicals and the oily gunk that will probably partly unburned end up in the exhaust? I haven't tried any of these chemicals because of "fear" of cat failure later on.
We use the BG air intake cleaner in our shop. What works best for us is to pressurize the solution can to no more than 20 psi and run the engine at 1500 rpms. It takes about 20 minutes for the can to empty and when test driving after the service, there is very little smoke/chemical from the tailpipe, meaning there is very little to no pooling of the solution. I have no idea as to the life of the cat however, because no data gets compiled on that from our invoices.
Thank you very much for the comparison between blast clean vs chemical injected at air intake, this is the only video I have seen so clearly about the comparison. Excellent explanation of the stratified mode, cold misfire and carbon buildup.
Intake valve is colder, so carbon loves to stick to that. Valve guide seals don't totally eliminate the oil running down the valve stem and onto the back of the valve. The oil cooks and sticks.
Good video! I’d like to add that the breather system is a part of the problem too some DI engines never get that dirty. I personally wouldn’t use chemicals on valves that bad because a chunk of carbon can come off and if gets gets on a valve seat the valve can burn up and also converter failure.
Revive could be a good preventive maintenance item but nothing beats like getting down and dirty and remove that carbon. Manually. Thank you for the great video.
Right!?....this direct injection thing on gas engines....turbos to make V6 stronger than V8 Please, give me the old-style injectors with pushrods....(i.e. Ford's new 7.3L gas)
I mean it is OK to clean with the blaster the way you did Dan, however a great chance that residue in the inlet manifold ( many a times a one piece plastic composite casting, ) and practically Unwashable, yes replacement is the effective manner; so the heavily fouled up inlet tract/ passeges would disloge and contaminate yet instantly you put back the inlet manifold in place- mainly due to physical disturbance and vibration coupled with the air flow and pulsations , etcetc. Some new customers always think that I want I to exagerate telling them them of the labour intensive job/ price to do a very good job. Volumetric Efficiency should have Combustion Mixture added on the front Cheers Dan.
The quality of what you are sharing is second to none Danny. Thanks especially for taking the extra time in dismantling the intake twice for our benefit. I’ve never heard a proper explanation of the cold misfire cause before but your description makes perfect sense. Have you ever seen the port dividers on TSi engines broken in half. I’ve seen a couple now and wondered if it might be due to excessive intake air temp caused by bad remaps. Both were on cars owned by young drivers with exhaust and air filter modifications?
Cabaliero while it may not totally eliminate the problem, I’m sure it would take much longer for the problem to appear if a catch can was fitted at the factory.
@@calm4477 They did it on some engines before, than stopped. Now they do 1.8tsi with two injectors per cylinder, one in the cylinder, and other in the manifold, that helps but very expensive and complicated.
They probably realised it makes. More money when the customer brings the car back to the dealer for a fault that's appears conveniently after the warranty expires ;)
This carbon buildup is all about oil evaporation and exhaust gases turned in intake line, catch can can't catch it well enough. Some experts advise using of oil with low evaporate level, and clean intake ports every 20K miles.
Im technician and learning loads from your content this was a great video for me as i own a 1.4 tfsi golf after watching this i am now regularly using a intake treatment to prevent the build up of carbon it has only done 21k miles so hopefully can prevent this inevitable fualt thanks dan your a top guy
great video!!!!!!! one question, in the scan data there is a data PID that indicates in what mode it is the fuel mixture? So i can veryfied that when it tells me that is in the stratified mode and i can check that the misfires are happening in that moment and in the precise moment that the mixture mode change to the homogenues mode the misfire disapeare
Добрый день. Ссылку на Ваш канал дали. Проблема двигателей с непосредственным впрыском известна-закоксовка впускных клапанов. Сначала придумали, потом столкнулись с этой проблемой и начали придумывать решение. У меня с такой проблемой были EP6. Причем есть интересная особенность. Конечно в Вашем случае появились уже пропуски воспламенения. Но динамика машины понемногу ухудшается с закоксовой. Решение по очистке очень интересное. Не все понял, плохо знаю английский, но примерно все ясно. Успехов в работе и спасибо. Подпишусь на канал.
here in the states i use a product called B.G. they make several kits but the one we used at the Cadillac dealership is a three can kit it runs about 35 bucks. we first run the engine around 2k and direct inject through a vacuum port. once this was done i would fill the B.G. can with warm water and repeat the process. the other can was poured into the fuel tank, once we drove the car for about 20-30 min it took care of almost all build ups
Dan , Automotive test solutions 3c chemical machine uses a three part chemical system. Bernie shows lots of case studies before and after with great results. Depending on how bad the carbon on most applications there is no need for intake removal or blasting . It’s on my list of equipment for my shop. This system is one that will keep cost down for our customers and the service is something that the customer can actually feel the difference when complete. Keep videos coming love em. Thanks.
Wow! The carbon cleaning strongly resembles a surgical procedure! Very interesting. I learned a great deal from this video Dan! Stratified & homogenous, etc... very intricate detail! Above & beyond as usual! I can imagine how much time this video took to make. I applaud you Dan!
Cuba's en verdad Dan hace uno de los mejores contenidos en TH-cam, tambien puedes encontrar todos esos detalle en la plataforma ELECTUDE, es muy buena plataforma en la formación en linea para los mecánico
Dan is the man. Simples. I used Mr muscle oven cleaner on turbos and intakes. It's not something for a new car but old higher mileage engines you haven't got a lot to lose and it works well.
Another fsi misfire cause is spark plug gap or incorrect plug. Fsi is sensitive to spark in various situations. This was cold misfire specifically though so mostly this is Carbon build up or runner flap fault. Also worn cam lobes can cause random misfires which are hard to trace. Im buying the autel mk808bt this year and I love the camera scope will get one of those aswell. Smashing video Dan as always.
Most techs knew back when this system was first introduced that this would be one of the biggest issues with it. It is a stupid design and people are paying for it when the failures occur. Best method to keep this from happening is running dual injectors, which many of us figured would be incorporated into the design. It wasn't until recently on some makes and models. Great video Dan! Seems that there is little in the way of effective cleaners aside from blasting to get the carbon off.
Agreed Joe, once the carbon build up gets to a point it starts to effect the engine it looks that the only real solution is blasting. Thanks for watching 😀
I had DI engines run good again with revive ! Never opend them up to look inside but I used a lot of it. Soakt it in real good, never heard the complaint again. Greetings, nice vid
@@Diagnosedan indeed. This one is bad haha. Oven cleaner seems to work wonders on carbon buildup (what I heard of). I don't know if the intake will like it..
Dan that revive technique is very similar to General Motors TEC, or Top Engine Cleaner. When TEC was originally created it was a liquid you poured right into the carb of a hot engine running at high idle, and you were supposed to pour it in steady and then the last 1/3 pour faster and let the engine stall out in the process then let it sit for 20 minutes, then take it for a drive and blow it out good and return and REPEAT a 2nd time. The GM tech people were pretty adamant about doing it a second time or don’t bother at all. In later years they released a spray for easier use with some FI engines and also supposedly some techs were hydraulicing the engines during the stall out and causing damage and they stopped recommending you stall the engine out. The stuff worked great though. We used it primarily to decarbonise the valve and internal combustion area when trying to stop cars from pinging (detonation) back in the 80’s and 90’s.
Very interesting video and super detailed! My car, a Seat Leon 5F 2013 1.2 TSI with 135.000 km on it has some different symptoms. It runs smoothly when stationary, but only when giving full throttle driving at around 100 km/h in sixth gear at roughly 2000 rpm, it starts to vibrate and feels like misfires. Do you think this is also due to carbon deposits on the intake valve? Also, do you think a regular oil engine flush before changing oil helps to remove carbon deposits from the intake valves? Looking forward to your answer.
Thank you for taking time out of your day to film this. I got to say your shop is clean enough to eat off the floor. Well maybe not that clean but clean enough for high end cars. I imagine that you would have a fit if you had to work on an old American truck like Eric O.
Fantastic video Dan. As always a clear explanation of the cause of the problem, and the proper fix with evidence. You also saved people time and money by not using the snake oil. Looks like the additive might work if used regularly before the problem occurs, but will not help in an advanced case. More preventative maintenance . Thanks again, nobody does clearer more concise videos than you. Not even Eric O.
Some shops use walnut shells to blast the build up. Labor intensive but get the job done. Lexus dealership use a chemical to clean it. As you mentioned, if chemicals are applied on a regular maintenance basis, it would prevent the build up. I saw videos where diy spray oven cleaner or water once the engine is too hot. Not sure if it works.
Hello Dan, very good information. However, you raise a very important point: there is oily residue upstream the intake valve that will clog up the intake sufficiently in order to decrease performance. However, this is a common problem with all engines
Love the videos Dan, just following the diagnostic steps on modern cars is fascinating. In this one, the explanation of how these TDi engines work was really great. The only thing that made me think was where the carbon deposits were coming from? No fuel should be passing the inlet valves, only air, so no carbon there. Then it occurred to me that modern cars vent environmental contaminants back into the engine - via the inlet valves. Presumably, a car that gets this amount of deposits must be venting a lot of oil vapour for this to occur?
Another great video Dan! Thank you for the explanation. We deal with this issue at my shop quite a bit. Your explanation on hold and there’s fires happen really makes sense now.
Thank you for another great presentation Dan! Nothing is more certain than actually checking it visually like you did, especially those products that claim to clean internally. Also, there is no short-cuts on any job when things are real bad, I suppose. As for the blasting, in Japan they were using machine that blasts with dry ice pellets to do the same job. Since dry ice naturally disappears after while there is no need to neutralise or suck the residues up completely. I haven't seen this outside Japan. Also, on the future video, if you could mention the odo meter readings of the vehicle featured would be great. It gives some ideas as to what to expect at certain mileage though of course this varies on how the vehicle is being used and driven, it is still useful. Thank you and looking forward to your another great episode.
@@Diagnosedan Thanks Dan, I haven't seen one outside Japan being used in garages but if you're interested, this is what it looks like, though the page is in Japanese only you get the ideas from the photos. Cost might be the issue nonetheless, more and more cars are becoming direct injection, this might eventually become available in Europe. www.greentech-japan.co.jp/
contaminated air with breather blow by oil mist further from the actual cyl.head/ inlet valves makes modern ( albeit almost 15 years since ) also reduces the amount/ volume of air passing to the engine- sometimes to mere pencil hole orifices, more so on Diesel Engines with supposedly highly efficient systems. Unfotunately the manufectures do not supply easily proper knowledge ofthe Inlet breathing systems' route to the engine. Also they do not warn of the costs involved to service the systemon regular basis And what about actual oil residue via the PCV system which is so common contaminating Turbo oil coolers, where in many cases, more so in diesel engines , it causes "Run Away "engines Well thanks for your great input Dan
Great video Dan! We get these at the shop frequently although not many with this much build up. The newest BG products work well when applied correctly. An application like this may take several cleanings though, so would be a better candidate for blasting. The local VW dealer also has been using the BG products.
Thanks for making this video. I've been wanting to install a catch can on my tsi, but have been worried the dealership will void my warranty if I do. I haven't seen revive here in the states but we have a different product made by CRC that many people use for the same job. Now I have an idea how well it works.
84 Audi /gas/ had the same problem . We used to carbon blast intakes with walnut shells . Warranty paid for it once . It was easier to do this . Intake and exhaust manifolds out and ready to go . Where I'm "shocked" is that all these years later we have the same problem ....
Once again, best channel on TH-cam for the latest information about modern car repair. I thought the carbon was holding the valves open a little when cold. WRONG. Do u c the black rear bumpers on direct injection cars? I hate that. Port injection is best. Or a combination of both. This video, along with the ones on high voltage battery systems and many other subjects make this a standout channel!!! Thank u DD. U fixed it again.
Unfortunately it looks we lost a part of the Audio. nothing wrong with your speakers😉
What editor do you use? Or is it a TH-cam issue?
There is now that i went full volume and the audio came back 😂
@@MattyFielding6 "unfortunately"
Let me guess Dan
You've uploaded the video twice because of copy right Warning of the music that playd in your shop , and that's why you cut the audio 😁 ?
Also a issue for the Ford Focus mk3 ST (250) ecoboost, I fitted a mishimoto oil separator catch can, not a cure of it, but to help prevent less carbon build up, til a valve health check and clean
Good heavens DiagnoseDan you sealed up that engine bay better than the surgeons did when I had my appendix out.
I'm like... A little overkill ain't it?
Dr.Dan😂😂
@@Diagnosedan I thought you were going to deliver a baby TSI.
@Sam S "I don't think it's overkill" and then "I probably wouldn't wrapped it up as tight" and then "to each their own"... Hey Sam S, if you look under %100 of people cars on the road, there debris everywhere. That wrapping had to have been done to appease the internet perfectionist
Where were the Nurses????????
I love the fact that he's not covering up it when something is not going according to the plan!A honest man!
Hey Dan, Great video as always. FYI, we used GM Top Engine Clean in our Lexus engines to remove this carbon buildup in the IS250 V6 engines. The trick was to get the engine very hot then remove the intake while it was still hot, then pour the bottles' measured amount into each port except the one that had the valves open. We used a small scrubber made of a handful of ZIP ties (zip tied together) then gently scrubbed the intake valves for about two and a half minuets. After, we sucked the fluid out then sprayed carburetor spray to finish the cleaning process then finally sprayed WD40 to help neutralize the chemicals used. The last step was to turn the crank and clean out the last cylinder using the same procedure. The total time to complete the service was about two to two and a half hours. I think the pellet and vacuum system you demonstrated might be the best way to clean these valves because there are no harsh chemicals and the engine can be cold. One last thing, we noticed that the V6 engines with a manual transmission never developed carbon buildup. Perhaps the higher RPM's prevented any carbon misfire issues?
Thanks again for a great video!
Interesting, i can't explain why the manual didn't have carbon build up.
From what I see, it doesn't even matter if u clean it as with the first drive it will build back carbon.
Outstanding teaching skill and mechanical knowledge here, Dan. Yours is a level of competency all teachers should aspire to.
Wow thanks 😀
Wow the reveal of the soda blasted valves was amazing. Good work , I love it.
In my 43 years in the motor trade I can say most of the claims on all products that flush, clean or stop leaks or give better gas mileage are very exsagerated most of them cause additional symptoms or problems later on
There is no solvent that dissolves carbon in the few seconds these snake oils claim.
Yes, specially that seafoam crap.
Wow that Revive turbo cleaner worked quite well. This is the only video I've found where someone shows with an actual borescope the before and after results. I think using this or any other water-based non caustic, non flammable, and non corrosive degreaser and using it as a regular preventative maintenance would definitely see positive results. The thing is most people wait until the problem gets bad to try these products out. I can definitely see in the video that a lot of the accumulated gunk was removed with just 1 treatment.
the tsi engine also suffers from soft valve guides, i had a seat leon 1.6 with low rpm missfires, the valves float and loose compression.
another great vid dan, the carbon build up was strong in this engine.
Yes it was pretty nasty😀
Valve guide gets pulled down by the carbon on the stem...
@@lgtweewielers interesting but i have never seen that happen, the guides would have to be undersized fitting in the head for that to happen i would think.
Wow, what a superb video! I have exactly this problem on a VW 1.4TSI engine - misfires terribly when cold but goes after a few minutes. I thought it was just my car. This video nailed it and I will at least give some proprietary chemicals a go before looking into something more drastic (likely sell the car). Thanks for your efforts making the video.
Thanks for the quality of your videos and the thorough explanations. I teach high school automotive courses, and your videos are becoming a vital resource. It's also a bonus that you keep your dialogue "family friendly"! Subscribed!
That's great to hear Bryan
Such a helpful channel! 2013 Tiguan and my engine started misfiring in the cold weather, while in park and stationary was the worst of it. This is so helpful when it comes to communication with my mechanic. 💯
Did you get the blasting procedure done on your Tiguan? I have a 2013 Eos with the 2.0 TSI. At around 65,000 miles it was running a little rougher than normal and the gas mileage was lower as well. Went and had the walnut blasting done and it is like driving a different car! Runs so smoothly that it cant even be felt through the steering wheel and improved mileage. It's somewhat expensive but only has to be done every 65-75,000 miles. Hope your Tiggy is going strong!
@@markb3756 getting it done soon, I have to get my Tiguan towed 220+ miles to Salt Lake for the nearest VW person to do it. Worst part about moving to the countryside. Nobody wants to touch a VW.
Great video as always but I turned my volume all the way up thinking that something is wrong and nearly crapped myself after Dan started talking after all the silence near the end 🤣
Lol I started checking speakers, connections, muted volume.
😂 Oops!
I like that you not only explained why there is misfire, but also honestly showed what chemical can and can't do..
My pleasure 😀
TSI stands for Troubles, Serious Indeed
Terrible Shit inside. TFSI Terrible f@#ken shit inside. Timing chains especially.
Haha good one what would tdi stand for then
@@neilmurphy845 The Diesel Icon! obviously :)
@@Duvelz ya I heard the ones whitout that dpf crap were amazing engines could go 500 thousand no bother
😂😂
Phenomenal tutorial! First time I’ve seen blasting media that can be dissolved; pretty clever. Also the first time I’ve seen a cleaned valve get dirty again so quickly after being cleaned.
Hi From Canada, thanks for this informative video regarding direct injection carbon buildup. We appreciate if you could give us more details about the blaster system that you have used and the media (chemical solutions). Best Regards
Toyota have been using direct and port injection since the mid 2000's to overcome this problem (Lexus V6 comes to mind). A combination of direct and port is the way to go in my opinion. This is a huge problem with VAG and BM's, stating the bleeding obvious. Great explantion Dan.
The newer engines have an extra injector 👍
VW builds also the 2.0l engine with the aka Dual Einspritzung System.
Reminded me of a visit to the Dentist. Thank you Dan for another excellent video.
😂😂👍
Dan you are the best teacher I've seen on diagnostic, this video was very help full as many of us still believe that these engines runs perfectly, it's shows clearly the need of a regular cleaning. Thanks again cheers Charles
You forgot to mention that it's important to have each piston at TDC when you blast them, to avoid filling the cylinders with blasting media ;)
Hopefully if people are competent enough to take on a job like this as a DIY job, they should have the common sense that the valves need to be closed.
@@MTMMotorServices I've seen worse mistakes done by professional mechanics, so I wouldn't be so sure...
panzerveps fair enough.
Boss... we're going to need another box of neutralizer cans :D
There is alot to tell but this video was focussed on explaining the misfires
Another epic, guru-level educational video from the Daddy of Diagnoses!
Thanks for watching Nick😀
First 😉 thank you , for the good quality material teacher .
My pleasure 😀
My hat off to you Dan. You put in a lot of extra work just to test a product.
Yes but it was my pleasure 😀👍
hurray, new video from diagnose dan! please make more videos, dan. we love watching you solve and explain car problems
Thank you very much 😀
Deze man legt de oorzaak de beste oplossing en preventie mogelijkheid uit in 20 min🙏🏻🙏🏻
Where can i find your shop Dokter Dan?
Great video Dan. As always very informative.
Watching it was a BLAST.
😛😛
How is spraying in intake filter box fall into "after MAF"?Am not expert but what i know about engines gas and diesels, MAF sensor is after intake filter and if you spray anything in intake filter box beside MAF cleaning solution, MAF will go bad in some time.Dont gave me wrong i dont want bashing and shiting on your channel. I love this channel and learned alot watching thru yours working and explaining.
Ah emission controls, got to wonder if over the whole life of a car they actually save anything - at some point it all still comes out the exhaust, or results in co2 dump cause the car gets scrapped early. Grumble.
Indeed. Let’s catch everything in a filter then people will blow it all out in one go or wash it down the drain.
Thanks for watching 😀
Mate no one cares about emissions
Haha watch the vid about the problem retrofitting cats and dpfs on school buses in California has caused.
Haha to clean em out they back em up to the property line and let em go into Regen mode , blowing ash and all kinds of crap all over.
There was a whole bunch of vids a few years back on how carb is basically putting people out of business and costing everyone alot of money and we aren't seeing any benefits
Go to China ro France to see emission problems, or back to LA in the 80s where they would issue smog warnings.
Well impressive. Pretty unusual to find a mechanic who understands the technical side of engine operation and design to the extent you have explained in this video! Great stuff. Need to have a look to see if you have a video about Tsi engines that 'hiccup' when transitioning from low load to high load at mid rpm (e.g. going onto a steep incline, or heavish acceleration).
Blimey looked like you was carrying out liposuction on that engine😂😂😂
That’s the first case of open engine surgery I’ve seen carried out live on you tube 😉
We use tunap at my dealership it’s the recommended solution MB approve, I do like it although it is labour intensive as you stated.
My personal take on carbon build up on valves is to change the oil at more regular intervals to prevent old dirty sticky oil mist from pcv contaminating the valve stems. I flush & change the oil on my direct injection mercedes engine every 6 months ( being in London & encountering long times at idle in traffic) & haven’t suffered any large carbon build up although there will always be some residue due to fuel no longer being sprayed onto the back of the valves & cleaning them.
As always a good video sound quality asides, keep em coming 👍😀😀😀
Thanks for watching 😀
Kind of goes without saying but for those DIYers out there, make sure the ports/valves being blasted are COMPLETELY CLOSED. Another great video dan. I seem to get a lot of problem with injectors leaking overnight, wetting the spark plugs, also on BMW's
Yes that's a known problem on some brands
I stuck my blaster into the hole and it caused major damage. 🤣🤣 Great vid, Diagnose Dan does it again!
Everything is bigger in the States huh😉
Yeah the wrong hole , that was your mistake
I miss you sir....why very late?I am always waiting you.One of the best explain teacher.appreciate your efforts.
Thanks Nadeem
Ah it's finally out. I remember when we spoke about this lol who knew it would take so long to get a carbon buildup situation to film. I'm still waiting for mine 😆😆 great video Dan
I was thinking about you doing this video, it was long in the making😂
DiagnoseDan i can imagine! Nicely done!
At least it's not a Ford Ecoboost.
They recommend no chemical cleaning or manual scraping because it can cause damage.
Replace parts ....like heads , intakes , turbos ....haha what a joke so at least a vw is better in that respect.
Thank You for yet another excellent video, Dan.
When I was watching the part where you had used the chemical, and said , that it did not work as you had expected, I thought, that perhaps you could just use a couple more bottles of it - say, 3 bottles in total.
From the video it looked like it did remove, at least, a half of the original amount of the build-up. So, the natural question comes, "Why didn't you just keep at it"?
Just a thought...
...
I use the CRC GDI Intake Valve Cleaner, here, in the U.S. and, to be honest, it works great for me. I do feel a better response from the engine after a cleaning, and do it periodically, once a year, or so.
Diagnose Dan, Your'e AWESOME!
Thanks Steve👍
Brings back memories of early 90s at the BMW dealership. Driveability campaign with the walnut shell blaster from Kent Industries. Good times.
😁👍
this is just the best timing! i have a gti with these problems in too!
Me too. Although the miss fire has got better after thrashing the thing lol. Bit like a 2 stroke bike, ride like a poof it gets serious carbon build up and slows down, wring it's neck and retain a healthy engine.
sell that shit as soon as possible
You know what to look for😉
Another Top Class video from Dan, especially the clear explanation of the modes of fuel injection of a direct Injection engine
I'm following car and motorcycle engines since air cooled, push rods, carbies and points. OHC....ok, fuel injected....ok, electronic ignition....ok but then the bullshit started with emission control and trying to squeeze out more efficiency out of engines which have 20-30 % efficiency only to start with. Super expensive to repair and costing the owner much more than paying a bit more for fuel during the lifetime of the vehicle. So I kept using Newtimer cars and one fine day soon i will jump to electrics. I get to drive a Tesla for long distance trips occasionally and i know they have their own set of problems. But they are very convincing and definitely the future (I mean electrics in general). Dan, you're an absolute legend and every new video from you makes be feel like a kid at Christmas.
Wow thanks for the nice comment 😀
I think the real problem here is the quality control off the car manufacturer. Why is it that VW didn't discover all the problems with the TSI engine during the testing fase and why is it that they get away with the customers paying the bill for there poor design and quality. But people keep on buying these cars and keep on paying for poor design and quality.
It was great to see you have respect and use the fender and nose covers on the car. I’ve mentioned this to other YT mechanics but they continue to go without them. When I was a mechanic it was mandatory to do this as well as cover the seat and floor and also no belt buckle.
Thanks for watching 😀
I didn't heard you mentioning EGR valve.
When engine runs on lean-mode it produces lots of carbon!
At same time engine runs on almost closed throttle, which gives a lots of pumping losses.
That's why EGR valve opens and helping to decrease pumping losses. And that's why all carbon goes back to intake valves.
And if you mix all of carbon with oily steam from crank hause ventilation you get all that you saw on boroscope!!
There are more than one source of contaminstion. You are right 👍
i have a BMW N43 engine from E90 2008 with 180000 km , cold start misfiring for 3 min . i check that out . great video again !!!
Just started to watch your videos ! Keep up the hard work really enjoy watching them 👍
Thanks for watching 😀
my greatest admiration, for your knowledge and experience, and the simple way to diagnose automotive problems. thanks and blessings...
Great educational video as usual :) What does the cat think about these chemicals and the oily gunk that will probably partly unburned end up in the exhaust? I haven't tried any of these chemicals because of "fear" of cat failure later on.
When using the BG direct injection cleaner you have to snap the throttle to 3k every 60 seconds to prevent cat failure
I think its supposed to burn but it proberbly doesn't burn all. Good question.
We use the BG air intake cleaner in our shop. What works best for us is to pressurize the solution can to no more than 20 psi and run the engine at 1500 rpms. It takes about 20 minutes for the can to empty and when test driving after the service, there is very little smoke/chemical from the tailpipe, meaning there is very little to no pooling of the solution. I have no idea as to the life of the cat however, because no data gets compiled on that from our invoices.
Thank you very much for the comparison between blast clean vs chemical injected at air intake, this is the only video I have seen so clearly about the comparison. Excellent explanation of the stratified mode, cold misfire and carbon buildup.
Doesn't the carbon buildup have something to do with EGR valves?
Michał Chyliński that and also oil vapors!!
Probably, but also on cars without EGR valve this is a big issue.
@@tomvleeuwen Thanks, I wasn't aware of that🤟
Tom without egr takes more time to build up however the main factor are the oily residues!!
Intake valve is colder, so carbon loves to stick to that. Valve guide seals don't totally eliminate the oil running down the valve stem and onto the back of the valve. The oil cooks and sticks.
Why doesnt VAG switch back to EFI.... god...
The 1.8 20v turbo was an amazing and long lasting engine. No gunked up valves as well
How are they gonna make money off you by cleaning up a problem they cause???
Good video! I’d like to add that the breather system is a part of the problem too some DI engines never get that dirty. I personally wouldn’t use chemicals on valves that bad because a chunk of carbon can come off and if gets gets on a valve seat the valve can burn up and also converter failure.
Great video Dan!
Thank you very much 😀
Revive could be a good preventive maintenance item but nothing beats like getting down and dirty and remove that carbon. Manually. Thank you for the great video.
Agreed Juan👍
A spray bottle of hot water into the intake with some raised rpms would've worked better than the cleaning product.
seems doubtful since the water wouldn't be hot when it passes over the valve.
Maybe!
A great demonstration and explanation of a common issue. Keep up the good work. 👍
Sometimes it seems the smarter we try to be with getting engines fuel efficient, the dumber we look.
Right!?....this direct injection thing on gas engines....turbos to make V6 stronger than V8
Please, give me the old-style injectors with pushrods....(i.e. Ford's new 7.3L gas)
Thanks for watching 😀
With refinement comes complications
I think Toyota is putting in pre-valve injectors again just for cleaning while keeping Di.
No more crappy eco cars that have no power but good fuel economy. Cars need everything in one package now
I mean it is OK to clean with the blaster the way you did Dan, however a great chance that residue in the inlet manifold ( many a times a one piece plastic composite casting, ) and practically Unwashable, yes replacement is the effective manner; so the heavily fouled up inlet tract/ passeges would disloge and contaminate yet instantly you put back the inlet manifold in place- mainly due to physical disturbance and vibration coupled with the air flow and pulsations , etcetc.
Some new customers always think that I want I to exagerate telling them them of the labour intensive job/ price to do a very good job.
Volumetric Efficiency should have Combustion Mixture added on the front
Cheers Dan.
Engineer's sitting back laughing.
😂😂👍
The quality of what you are sharing is second to none Danny. Thanks especially for taking the extra time in dismantling the intake twice for our benefit. I’ve never heard a proper explanation of the cold misfire cause before but your description makes perfect sense. Have you ever seen the port dividers on TSi engines broken in half. I’ve seen a couple now and wondered if it might be due to excessive intake air temp caused by bad remaps. Both were on cars owned by young drivers with exhaust and air filter modifications?
I've not seen that yet, thanks for the comment 😀
It’s hard to understand why VAG hasn’t installed a catch can to prevent this exact problem
It doesn't help.
Cabaliero while it may not totally eliminate the problem, I’m sure it would take much longer for the problem to appear if a catch can was fitted at the factory.
@@calm4477 They did it on some engines before, than stopped. Now they do 1.8tsi with two injectors per cylinder, one in the cylinder, and other in the manifold, that helps but very expensive and complicated.
They probably realised it makes. More money when the customer brings the car back to the dealer for a fault that's appears conveniently after the warranty expires ;)
This carbon buildup is all about oil evaporation and exhaust gases turned in intake line, catch can can't catch it well enough. Some experts advise using of oil with low evaporate level, and clean intake ports every 20K miles.
Im technician and learning loads from your content this was a great video for me as i own a 1.4 tfsi golf after watching this i am now regularly using a intake treatment to prevent the build up of carbon it has only done 21k miles so hopefully can prevent this inevitable fualt thanks dan your a top guy
Thanks for watching my video's Christopher 👍
It will slow it down at best.
This guy should have 10 millions subscribers at least
great video!!!!!!! one question, in the scan data there is a data PID that indicates in what mode it is the fuel mixture? So i can veryfied that when it tells me that is in the stratified mode and i can check that the misfires are happening in that moment and in the precise moment that the mixture mode change to the homogenues mode the misfire disapeare
As usual you are professional and honest man , great Dan
Добрый день. Ссылку на Ваш канал дали. Проблема двигателей с непосредственным впрыском известна-закоксовка впускных клапанов. Сначала придумали, потом столкнулись с этой проблемой и начали придумывать решение. У меня с такой проблемой были EP6. Причем есть интересная особенность. Конечно в Вашем случае появились уже пропуски воспламенения. Но динамика машины понемногу ухудшается с закоксовой. Решение по очистке очень интересное. Не все понял, плохо знаю английский, но примерно все ясно. Успехов в работе и спасибо. Подпишусь на канал.
I did this by myself two months ago on my Octavia A7 TSI, completely hands job, it was a hell.)) But now my car works well.
Its worth the work!
here in the states i use a product called B.G. they make several kits but the one we used at the Cadillac dealership is a three can kit it runs about 35 bucks. we first run the engine around 2k and direct inject through a vacuum port. once this was done i would fill the B.G. can with warm water and repeat the process. the other can was poured into the fuel tank, once we drove the car for about 20-30 min it took care of almost all build ups
Sounds impressive
@@Diagnosedan ill see if i have some at the shop and send you a link not all b.g. products are the same
Dan , Automotive test solutions 3c chemical machine uses a three part chemical system. Bernie shows lots of case studies before and after with great results. Depending on how bad the carbon on most applications there is no need for intake removal or blasting . It’s on my list of equipment for my shop. This system is one that will keep cost down for our customers and the service is something that the customer can actually feel the difference when complete. Keep videos coming love em. Thanks.
Thanks Richard👍
Wow! The carbon cleaning strongly resembles a surgical procedure! Very interesting. I learned a great deal from this video Dan! Stratified & homogenous, etc... very intricate detail! Above & beyond as usual! I can imagine how much time this video took to make. I applaud you Dan!
Thanks Cuba😀
Cuba's en verdad Dan hace uno de los mejores contenidos en TH-cam, tambien puedes encontrar todos esos detalle en la plataforma ELECTUDE, es muy buena plataforma en la formación en linea para los mecánico
Clear and concise! Solid explanation of the theory behind carbon build-up and it's effect on engine performance.
Dan is the man. Simples. I used Mr muscle oven cleaner on turbos and intakes. It's not something for a new car but old higher mileage engines you haven't got a lot to lose and it works well.
Another fsi misfire cause is spark plug gap or incorrect plug. Fsi is sensitive to spark in various situations. This was cold misfire specifically though so mostly this is Carbon build up or runner flap fault. Also worn cam lobes can cause random misfires which are hard to trace. Im buying the autel mk808bt this year and I love the camera scope will get one of those aswell. Smashing video Dan as always.
Most techs knew back when this system was first introduced that this would be one of the biggest issues with it. It is a stupid design and people are paying for it when the failures occur. Best method to keep this from happening is running dual injectors, which many of us figured would be incorporated into the design. It wasn't until recently on some makes and models. Great video Dan! Seems that there is little in the way of effective cleaners aside from blasting to get the carbon off.
Agreed Joe, once the carbon build up gets to a point it starts to effect the engine it looks that the only real solution is blasting. Thanks for watching 😀
I had DI engines run good again with revive ! Never opend them up to look inside but I used a lot of it. Soakt it in real good, never heard the complaint again.
Greetings, nice vid
Maybe the Carbon build up wasn't as bad as this one.
@@Diagnosedan indeed. This one is bad haha.
Oven cleaner seems to work wonders on carbon buildup (what I heard of).
I don't know if the intake will like it..
Dan that revive technique is very similar to General Motors TEC, or Top Engine Cleaner. When TEC was originally created it was a liquid you poured right into the carb of a hot engine running at high idle, and you were supposed to pour it in steady and then the last 1/3 pour faster and let the engine stall out in the process then let it sit for 20 minutes, then take it for a drive and blow it out good and return and REPEAT a 2nd time. The GM tech people were pretty adamant about doing it a second time or don’t bother at all. In later years they released a spray for easier use with some FI engines and also supposedly some techs were hydraulicing the engines during the stall out and causing damage and they stopped recommending you stall the engine out. The stuff worked great though. We used it primarily to decarbonise the valve and internal combustion area when trying to stop cars from pinging (detonation) back in the 80’s and 90’s.
Hydrolock would be one of the biggest concerns using a liquid product. That's why it needs to be sprayed very carefully.
Very interesting video and super detailed! My car, a Seat Leon 5F 2013 1.2 TSI with 135.000 km on it has some different symptoms. It runs smoothly when stationary, but only when giving full throttle driving at around 100 km/h in sixth gear at roughly 2000 rpm, it starts to vibrate and feels like misfires. Do you think this is also due to carbon deposits on the intake valve? Also, do you think a regular oil engine flush before changing oil helps to remove carbon deposits from the intake valves? Looking forward to your answer.
Thank you for taking time out of your day to film this. I got to say your shop is clean enough to eat off the floor. Well maybe not that clean but clean enough for high end cars. I imagine that you would have a fit if you had to work on an old American truck like Eric O.
My first job was at my fathers junk yard, so i've seen alot😉
very thorough explanation of the problem, thanks!!!
Thanks
Cool crankcase catch can and also clean down the throat of the intake works pretty good.
Watching you do your thing is like learning from the master!
Thank you very much 😀
A chemical additive will never clean as well as some form of media blasting. Well demonstrated. Thanks!
I think you are right
Fantastic video Dan. As always a clear explanation of the cause of the problem, and the proper fix with evidence.
You also saved people time and money by not using the snake oil.
Looks like the additive might work if used regularly before the problem occurs, but will not help in an advanced case.
More preventative maintenance .
Thanks again, nobody does clearer more concise videos than you. Not even Eric O.
That's a great comment Sir😀
Doctor Dan, the patient is prept and ready for surgery. Thank you Nurse Ratchet I'll be there in a moment
Thanks for the lesson and the carbon removal procedure Danny!
My pleasure 👍
we have a company called bg here in the U.S. that i think you might want to try, i was pretty amazed at how well it worked
I'll take a look at it👍
@@Diagnosedan you have an email address, I'll send you info on it, and which products to try, only drawback is you have too have a injection apparatus
Some shops use walnut shells to blast the build up. Labor intensive but get the job done. Lexus dealership use a chemical to clean it. As you mentioned, if chemicals are applied on a regular maintenance basis, it would prevent the build up. I saw videos where diy spray oven cleaner or water once the engine is too hot. Not sure if it works.
Agreed, i wouldnt dare to use oven cleaner on a customers Car.
Hello Dan, very good information. However, you raise a very important point: there is oily residue upstream the intake valve that will clog up the intake sufficiently in order to decrease performance. However, this is a common problem with all engines
thanks DAN for giving us this information about how carbon build up in direct injection engines
My pleasure 😀
Love the videos Dan, just following the diagnostic steps on modern cars is fascinating. In this one, the explanation of how these TDi engines work was really great. The only thing that made me think was where the carbon deposits were coming from? No fuel should be passing the inlet valves, only air, so no carbon there. Then it occurred to me that modern cars vent environmental contaminants back into the engine - via the inlet valves. Presumably, a car that gets this amount of deposits must be venting a lot of oil vapour for this to occur?
Another great video Dan! Thank you for the explanation. We deal with this issue at my shop quite a bit. Your explanation on hold and there’s fires happen really makes sense now.
Great to hear the video helper you understand the issue
Just did it again....Great video Dan. I use walnut Granules but I do like that stuff you used as it can be dissolved.
Hi Dan, your english is very easy to understand 👍👍....thank you
From Morocco
Thank you 👍
Thank you for another great presentation Dan! Nothing is more certain than actually checking it visually like you did, especially those products that claim to clean internally. Also, there is no short-cuts on any job when things are real bad, I suppose.
As for the blasting, in Japan they were using machine that blasts with dry ice pellets to do the same job. Since dry ice naturally disappears after while there is no need to neutralise or suck the residues up completely. I haven't seen this outside Japan.
Also, on the future video, if you could mention the odo meter readings of the vehicle featured would be great. It gives some ideas as to what to expect at certain mileage though of course this varies on how the vehicle is being used and driven, it is still useful.
Thank you and looking forward to your another great episode.
130K kilometers, i've never seen blasting with ice over here.
@@Diagnosedan Thanks Dan, I haven't seen one outside Japan being used in garages but if you're interested, this is what it looks like, though the page is in Japanese only you get the ideas from the photos. Cost might be the issue nonetheless, more and more cars are becoming direct injection, this might eventually become available in Europe.
www.greentech-japan.co.jp/
contaminated air with breather blow by oil mist further from the actual cyl.head/ inlet valves makes modern ( albeit almost 15 years since ) also reduces the amount/ volume of air passing to the engine- sometimes to mere pencil hole orifices, more so on Diesel Engines with supposedly highly efficient systems.
Unfotunately the manufectures do not supply easily proper knowledge ofthe Inlet breathing systems' route to the engine.
Also they do not warn of the costs involved to service the systemon regular basis
And what about actual oil residue via the PCV system which is so common contaminating Turbo oil coolers, where in many cases, more so in diesel engines , it causes "Run Away "engines
Well thanks for your great input Dan
You are a great teacher. Thanks for sharing your knowledge.
Thank you very much 😀
Great video Dan! We get these at the shop frequently although not many with this much build up. The newest BG products work well when applied correctly. An application like this may take several cleanings though, so would be a better candidate for blasting. The local VW dealer also has been using the BG products.
Yes this one was pretty bad😬
Thanks for making this video. I've been wanting to install a catch can on my tsi, but have been worried the dealership will void my warranty if I do. I haven't seen revive here in the states but we have a different product made by CRC that many people use for the same job. Now I have an idea how well it works.
Thanks for watching Alan😀
A catch can will help with crankcase oil vapour but not turbo oil vapour
84 Audi /gas/ had the same problem . We used to carbon blast intakes with walnut shells . Warranty paid for it once . It was easier to do this . Intake and exhaust manifolds out and ready to go . Where I'm "shocked" is that all these years later we have the same problem ....
I Recently found your channel and its a revelation and wanting me to diagnose the right way but so many different diagnostic tools difficult to choose
Once again, best channel on TH-cam for the latest information about modern car repair. I thought the carbon was holding the valves open a little when cold. WRONG. Do u c the black rear bumpers on direct injection cars? I hate that. Port injection is best. Or a combination of both. This video, along with the ones on high voltage battery systems and many other subjects make this a standout channel!!! Thank u DD. U fixed it again.
Thanks Bill!😁