Confirmed - B8/8.5 TFSI Carbon Buildup

Ahh I will double check, I see what your saying.

Nope, I’ve logged quite a bit, car rarely pulls more than 4 degrees on a hard pull, with the temperature dropping it rarely pulls any timing.

I’m not sure why so much water vapor is being expelled, but it was probably spilling 200-250ml of water vapor(small small amounts of oil), every 8-10 days.

On my 2008 GTI, MKV… I had a catch can set up… and in the winter, I had to empty it every day to prevent it from freezing and causing blockage. A buddy of mine did the catch can set up but he was too lazy to drain it every day… He ended up stalling his engine and it died on him… rofl.

This is one of the reasons I removed my catch can setup.

woooooooow @________@

Any updates on how this system is running ;D (necro bump!)

I’m in contact with APR and they mentioned checking out the PCV system. This mod seems pretty extreme, but I’m curious about other options for blocking the PCV system.

I would go after the usual suspects first. Fuel filter, spark plugs, check coil packs, flush the CPS coolant if you have one. Bubbles in the coolant system can cause high IATs. I had to flush mine several times before it was bubble free.

I did a carbon clean on mine at about 45K miles iirc and the tech removed a fair amount of carbon. There was also an updated pcv valve that the 2011s received (tsb? ) when he did my carbon clean.

That amount of timing pull you have is definitely off. Something is not right.

Where did you have carbon? Intake ports like the RS4?

Yup, hear you on that. Saw pretty horrible timing pull with IAT’s very low, so not sure if the CPS is at fault. I know I didn’t do the best job bleeding my system. Plugs will definitely be replaced. Maybe coilpacks. Fuel filter sounds like a big PITA but will definitely put it on the list. Probably towards the end (since it looked like my rail pressures were pretty close to the requested values - which assumes I was looking at the correct signals lol).

Yes- tech said it wasn’t as bad as the RS4s he had done but it definitely had a good amount.