Tdi Boost problem
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- Опубликовано: 22 июл 2022
- take a look at my ebike channel / @magicebikestuff890
Follow along as we find a boost problem with the source of the problem not revealing a trouble code.
2000 Vw Jetta 1.9L Tdi ALH
if you would consider contributing to the continued production of these videos find the donate icon on my website at www.kansascitytdi.com
P0101
p0299 
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Thanks to videos like yours, I can keep my car out of a shop! Don’t get me wrong, if there was something I couldn’t diagnose myself, I would most certainly take it to someone like you…if we had one around here 🤔
Awe, shucks. Thanks.
Screw in the intercooler... hmm, where have I seen that before!!?? ;-)
I know this guy.....
Thank you so much for this video! It is helping me figure out a similar low boost problem that I need to ask for help with...I have two TDI Beetles - a 1999 and a 2002.
1999 TDI Beetle - Low power and occasional "limp mode" experienced when warmed up good and on steep mountain climbs (Blue Ridge Parkway area in NC)...turn car off and back on, and turbo power is restored but not full power. Car has 285K, new MAF last year, cleaned intake a year ago and did the EGR / Cooler delete, timing belt kit etc.
VCDS reports code 17958 - Charge Pressure P1550 - 35-10 Control Deviation - Intermittent - It doesn't say positive or negative deviation. MAF numbers look good on VCDS - 450-900 and no MAF codes showing.
There is a pronounced "wooshing" sound coming from the front dash area when accelerating that changes in relation engine RPM under load but can't reproduce it in the shop. The wooshing noise stops when in "limp mode", so I think I am hearing the boost leak out of the system when driving but can't figure out from where? I've visually inspected the boost pipes and removed/resealed the block-off plate from the EGR delete hoping that would cure it (it was warped a bit). Can the turbo housing itself leak? I've swapped a known good N75, replaced the vacuum lines, vac pressure at the N75 and raw (15-18 range on the MityVac gauge); the turbo actuator holds vacuum at 20 just fine. The turbo actuator moves smoothly during the N75 test and also when manually pressurized from MityVac. I tried by passing the N75 and putting vacuum direct to the actuator - no change. I imagine the turbo could use a cleaning but am trying to figure out how to get the turbo to boost while sitting in the shop so I can search under the hood to find the leak? Can you use MityVac to force the turbo to boost without putting the car under load going down the road or is there some other way to force boost for diagnostics? I wish I could paste the VCDS graph here in the post -it clearly shows some boost, but the system is not able to produce as much boost as specified. In VCDS, the Boost Specified graph line is at approx 6.5 bars from the baseline on the vertical scale while the Actual Boost lags a block behind and only reaches about 4.8 bars on the graph - almost 2 full bars below specified boost. Does anyone know how to make boost happen while in the shop to diagnose the boost leak? Thank you all for your help!
Thanks. For the great videos as always! P.s. If the car comes back, check for the small boost leak on the lower passenger side boost pipes.
ok! good tip!
Great video! I didn't realize the mass air flow could be graphed with VCDS. Very good to know. Thank you!
Hey thanks for the donation !
Nice diagnostic, it's good that you have the same model car to quickly prove your instincts by temporarily swapping parts.
Have you ever considered teaching nights at a trade school? You have a talent for explaining things and demonstrating the logical diagnostic process.
Yeah, on video! After about 6 takes with a bunch of gaffes!
Well done on the diag! The turbo vanes are most likely a bit sticky too, as it's probably been driven with a bad MAF sensor for a while. The yellow paint marker circle on the old MAF most likely means it was from a junkyard.
I checked for free movement of the actuator and vanes as I stated in the video.
Thanks from Sweden!!
your welcome
bonjour,
merci pour tout le travail que vous faite
franchement vous êtes un génie
Je vois que tu as regardé pas mal de mes vidéos. Merci beaucoup.
@@CoolAirVw
Et pour vous dire aussi
Je suis un fan de vous
J apprécie beaucoup votre travail et surtout votre simplicité d'expliquer les choses.
Comment for the RUclips algorithm keep up the great work and thank you for sharing your knowledge
How's your Jetta doing?
@@CoolAirVw running like a top thank you so much. Made it back to Oklahoma without any issues
@@glowpoi Dont hot-rod the car so much and wont fail as often! ;) Stay cool in this heat!
@@CoolAirVw but that's why I got a tdi lol
@@glowpoi :)😁
Thank you for sharing your obvious skills with us. I wanted to get your thoughts on the issues on my recently purchased 2011 Audi A3 2.0 TDI. These diesel gate cars seemed to be a good buy with a supposedly great warranty. I now find myself with a car with a DPF filter code, a EGR code, hydra lock issues and coolant fan issues. The Audi dealership says warranty won’t cover them because the codes are “intermittent”. I know someone like you could fix these issues. Audi, however requires a Audi dealership for warranty repairs. The car is running well at the present time however. I know that’s a big can of worms, but I thought you might have dealt with Audi or have any suggestions . Again, thank you for your videos.
Do you have a specific question? Lots of folks just delete them, but dont do it under warranty.
@@CoolAirVw do you know of anyone who has had dieselgate warranty work done by Audi/Volkswagen concerning these emissions issues.
@@garysuper5338 Yes. Tons of them.
Nice one
thanks
Question on when the computer is "commanding" boost - Is that input (green line on the graph) from the throttle pedal?
No. It is a command from the PCM of the actual amount of boost the computer desires.
Hey sir,Looking to buy a 2014 jetta 1.8 t. Been binge watching your videos about code p0299 and wanted to maybe get your opinion. No check engine light, seller says the turbo was “higher” and he would bring it back to stock saying that would fix the problem.
cant diagnose your car based on information you just typed. What tests have you done?
thanks
You're welcome!
Hey, I'm chasing a low boost code p0299 on my 2004 BEW that is intermittent (sometimes I can drive for days before it goes into limp mode) just wondering if you or anyone else has had the same issue and what would be some of the first things you'd check. Thanks in advance
you have to graph it to see what is happening. You might see that its sticking intermittently. If so you have a sticking vnt or solenoid. Other videos show process to identify that stuff. If overboosts constantly but only triggers the code when you drive it under certain circumstances then you may need to adjust your actuator.
Hey!
i have 2004 b5.5 and it has no power, when accelerating it makes whoosh sound. can it be boost pipe leak?
Yes,(but it can be other stuff also. Obviously check the whole system. Have a helper rev the engine while you listen to identify the issue. Check the lower pipe, sort of shaped like an "S" coming off the turbo, and the elbow pipe coming right off the intake (near firewall). These can have small slits in them that are hard to identify.
Bjr monsieur
Juste une suggestion
Ça serait bien de votre part,
Quand vous diffusé une vidéo de mettre le code défaut dans le titre de la vidéo
Et bonne continuation monsieur.
Parfois, il y a plusieurs codes. J'ai mis les codes dans la description, et vous pouvez les trouver avec une recherche.
Can someone tell me how to graph boost on newer 2013 VW TDI? Measure Blocks not an option only. Getting P0299 code and Limp mode all the time. Thanks
You have a uds car. click advanced measuring blocks then search for the parameters you need then click them. here is a video I have on looking at uds data in a AC computer.
I've been watching some of your videos trying to figure out my problem... I lose boost after long drives ,,about 400kms or so then I lose boost but it comes back after shutting and restarting car. Any idea or link to a video
what you are saying simply means you have a trouble code. 1st step would be to check for trouble codes., After you get the code, watch the videos that apply to that code.
When i hook up to mine the computer isn’t telling the maf proper levels? Your computer at idle is 850 mine is450
Does this mean your maf is not reporting? or does it mean there is no airflow through your maf because a hose is disconnected somewhere?
Ever come across a symptom where driving seems like no boost , but no codes ?
does it feel like it goes to "limp mode"? Maf flatlined? Clogged intake?
The boost pipe gets loose sometimes
I hate it when that happens.
Would you think a clogged intake would cause a Low boost condition? for a guy with out VagCom, and some experience with Tdi's is it worth swapping the MAF first?
It causes reduced airflow so the computer injects less fuel so it makes less power. Might be worth swapping out maf, but dont fall for the commonly repeated ignorance on the internet of "unplug it as a test". I swear I think MAF companies released that rumor to sell more sensors! :) What year tdi you got?
@@CoolAirVw I have 2. Both 2003 Jetta wagons. Identical. Mine is stage 4, Malone tuned, 3 bar ant 17/22, blah blah blah. But I built it RIGHT, and have yet to have any issues in 120k. Has 314k on it.
The one in question I just bought. Its BONE STOCK, 2 owner 425k. Literally looks like its never been touched. 4 Timing belts, two clutches so thats a good thing. But it just lags, and chugs. Ive pulled/done intakes before. Im ordering VCDS (because its time to finally do it). Its just always a good look to get some other opinions and affirmations before jumping into a project. Theres not many of us real TDI guys around. More so somebodies kid that wants a hood stack exhaust. Ive been around the forums since 2002. Great videos man!
I should note, the turbo can be heard trying to spool, and no visual or audible hissing/vaccum boost leaks. Planning on pulling the egr elbow rubber off and taking a look in there. Luckily, the car came with an extra turbo/intake/egr system that seems good. Total score for 3500 in todays market.
@@tukudikapup good plan. Nice deal!
So I scanned it, I’m reading hood boost. I’m thinking the veins may be seized up. Or it may be a timing issue. I’m getting ready to do the belt/pump on it. Wondering if you’ve done a video of that!?
Great content man!