rl Posted January 5, 2010 Report Share Posted January 5, 2010 Looking down through the spark plug hole at a intake valve/port on my wifes 2006 A4 2.0T FSI with 70k miles. Car has had Synthetic oil its entire life. This is a common problem I guess. Had some random misfires and a few other odd codes. http://www.lasotaracing.com/rob/DIGI0023.JPG http://www.lasotaracing.com/rob/DIGI0022.JPG Carbon isnt just for Chryslers! Quote Link to comment Share on other sites More sharing options...
Skinner Posted January 5, 2010 Report Share Posted January 5, 2010 In before the Audi group cries foul. Quote Link to comment Share on other sites More sharing options...
Aaron Posted January 5, 2010 Report Share Posted January 5, 2010 The FSI cars are known to have their issues. Cam follower problems, and carbon buildup are its main problems. They also blow PCV valves and diverter valves when the power is increased. What is the course of action on her car? Quote Link to comment Share on other sites More sharing options...
Supplicium Posted January 5, 2010 Report Share Posted January 5, 2010 If you know what fsi is you will understand why it looks like that. My bet is she filled up with 87 a couple times. Quote Link to comment Share on other sites More sharing options...
3.1cutlass Posted January 5, 2010 Report Share Posted January 5, 2010 In before the Audi group cries foul. Quote Link to comment Share on other sites More sharing options...
Brandon Posted January 5, 2010 Report Share Posted January 5, 2010 Good ole snap on boroscope at work there Rob? I would say the cylinder head may need to come off. Quote Link to comment Share on other sites More sharing options...
rl Posted January 5, 2010 Author Report Share Posted January 5, 2010 Yeah a BK6000 brandon The head will come off. As will the factory PCV system. Provided Audi won't fix it, which is the first route I'll take. This shouldnt happen with such low miles on a car that has been taken care of like this. I understand why it happens, its a dumb design. She uses 93 all the time and it gets pento 5w-40 every 7k. If you know what fsi is you will understand why it looks like that. This isnt my first time around the block. The FSI motors are DI so they don't have a injector spraying a hot intake valve to help remove carbon. Additionaly they don't use a EGR valve, instead to reduce NOX emissions they just retard one cam and advance the other under certain conditions which allows a decent amount of overlap and causes some serious carbon buildup. One or two tanks of 87 wouldnt cause that. Hell, I doubt the gas makes THAT much of a difference. The biggest factor is a shitty PCV system combined with what I stated above. In the patent for the FSI motors Audi Admited that the PCV was lacking and caused carbon issues. Quote Link to comment Share on other sites More sharing options...
Aaron Posted January 5, 2010 Report Share Posted January 5, 2010 Can this be prevented altogether or at least partially? VW redesigned the 2.0T for 2008.5, so hopefully the TSI's do not have this problem. Quote Link to comment Share on other sites More sharing options...
rl Posted January 5, 2010 Author Report Share Posted January 5, 2010 Drive the piss out of the car every once in a while. A new PCV system will help too. Quote Link to comment Share on other sites More sharing options...
Aaron Posted January 5, 2010 Report Share Posted January 5, 2010 That won't be a problem for my dad at all. (has FSI GTI with 16k miles on it) Do you mean new pcv system as in new oem parts? or a new redesigned system? How do you check for proper function of the pcv system? Quote Link to comment Share on other sites More sharing options...
rl Posted January 5, 2010 Author Report Share Posted January 5, 2010 You can measure vacuum at the oil dipstick. I think the late model cars where OK. I'm going to make a catch can for the wifes car as well as a few other things. Quote Link to comment Share on other sites More sharing options...
Aaron Posted January 5, 2010 Report Share Posted January 5, 2010 If you don't mind, can you keep me up to date on what you do to her car? They already offer a few different catch can designs that are plug and play, although pricey. It would be nice to see what kind of results you have if you build one yourself. My dad isn't as proactive as he once was when it comes to cars, so I need to make sure I keep up on the FSI stuff for him (my car is the new TSI). Quote Link to comment Share on other sites More sharing options...
rl Posted January 5, 2010 Author Report Share Posted January 5, 2010 Most DI cars have the same issue, it stems from the lack of fuel on the intake valves. I know Porsche has issues. I'll either pull the head or just walnut blast the intake valves on the car, it will depend on what it looks like when I get the intake off. Quote Link to comment Share on other sites More sharing options...
RyM3rC Posted January 5, 2010 Report Share Posted January 5, 2010 I hope it was worth the benefits of DI to have scads of carbon! You can't drip a solvent into the manifold or seafoam it or anything? Quote Link to comment Share on other sites More sharing options...
CRed05 Posted January 5, 2010 Report Share Posted January 5, 2010 I heard Audi sells a cleaning solution for this Quote Link to comment Share on other sites More sharing options...
zeitgeist57 Posted January 5, 2010 Report Share Posted January 5, 2010 It's SEAFOAM time!!! Good luck, Rob. I look forward to the solution you come up with. I am actually kind of glad my wife's Passat has the 2.8L V6 now... Quote Link to comment Share on other sites More sharing options...
Hwilli1647545487 Posted January 5, 2010 Report Share Posted January 5, 2010 Should have bought her a Toyota. Quote Link to comment Share on other sites More sharing options...
neonkiller Posted January 5, 2010 Report Share Posted January 5, 2010 Rob, My car still rolls out you should of put her motor together like mine.. lol Bump for RL Quote Link to comment Share on other sites More sharing options...
Mr. Jones Posted January 5, 2010 Report Share Posted January 5, 2010 Yes, that is typical for the FSI motors. Intake off, thorough cleaning, and a reliable catch-can setup should do wonders, along with a heavy foot occasionally. Quote Link to comment Share on other sites More sharing options...
AngryBMW Posted January 5, 2010 Report Share Posted January 5, 2010 I heard Audi sells a cleaning solution for this Or just buy a BMW... -Marc Quote Link to comment Share on other sites More sharing options...
CRed05 Posted January 5, 2010 Report Share Posted January 5, 2010 Or just buy a BMW... -Marc Do they even know what direct injection in? Quote Link to comment Share on other sites More sharing options...
Mr. Jones Posted January 5, 2010 Report Share Posted January 5, 2010 Do they even know what direct injection in? Yes, Google 335 HPFP Failures, they know what it is, just not how to do it right. Quote Link to comment Share on other sites More sharing options...
CRed05 Posted January 5, 2010 Report Share Posted January 5, 2010 Yes, Google 335 HPFP Failures, they know what it is, just not how to do it right. HA! I used to want a 335, but fuck man those things are falling apart. Quote Link to comment Share on other sites More sharing options...
V8 Beast Posted January 5, 2010 Report Share Posted January 5, 2010 I drive a pontiac so I cant say shit Quote Link to comment Share on other sites More sharing options...
Nitrousbird Posted January 6, 2010 Report Share Posted January 6, 2010 That's why my wife's car has the CPO warranty. I'm worried about when that warranty runs out...I'll probably suggest getting a different car at that time. Quote Link to comment Share on other sites More sharing options...
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