EA888.3 - Surfing the parts catalog for PCV answers

[@Preen59]

This is so good, mate. Fantastic information!

[@NoHandleAT]

Good work DDMQB. I really appreciate the time you put into this.

[@dksaevs]

WOW ! great job! I'm going to need to watch this at least 3 times.

[@karstgeo7290]

Nice work.

[@bwoisness]

I have a 2020 S3 with unitronic stage 1+ ecu tune and stage 1 tcu. I had changed my PCV with a “OE” one from FCP Euro. I starting getting blue smoke on startup after a couple of months. It was always one puff of smoke after the car had been sitting. I was also getting oil residue on the turbo and turbo inlet. I ended up trying to trouble shoot because it was driving me nuts. I ended up replacing the pcv from fcp euro with a genuine Audi/VW unit from the dealership. It’s been a couple days and hasn’t smoked since.

[@ronniemattsson]

plz keep us updated on this :)

[@bwoisness]

@@ronniemattsson will do. I should add that it looked like the oil residue was right by the breather that comes off the pcv and connects to the turbo inlet.

[@datadrivenmqb]

Yeah man, genuine parts from an actual dealership or nothing when it comes to these valves. Hope it continues to work just fine!

[@bwoisness]

@@datadrivenmqb Thank you. Lesson learned.

[@whoismario]

Thanks for all your research on this topic. Have you done any video on how the pcv valves fail and how to test them for failure?

[@datadrivenmqb]

@@whoismario thanks! Not yet. Might be in the future.

[@steveallam]

If you want to control blow by install total seal rings. I did no blow by.

[@MonkeyEmpires]

Worn-out valve guides causing rocker arms to eject could be a thing!

[@scottli2436]

Can upload how to do crankcase pressure test gauge？

[@datadrivenmqb]

it's in the works for the future

[@blahbergerpoke]

Can you provide the part number for the pcv sensor?

[@datadrivenmqb]

06H906052B If you have factory SAI, you can use a harness from SC Skunkwerks to steal the SAI pressure sensor wiring for logging purposes.

[@blahbergerpoke]

@datadrivenmqb Rockstar thank you, I don't have SAI since I have an R, but I'm gonna try to wire it into the ecu. Just need to find an open pin accepting 5v.

[@datadrivenmqb]

@@blahbergerpoke someone with an R has wired it to the same pin that is normally used for SAI for what it’s worth. The 5v signal still works as an input to the ECU. I’m not sure where he pulled the 5v reference and ground from though. At some point I’ll write up all the info on how to get it wired up and start logging.

[@blahbergerpoke]

​@datadrivenmqb So did some digging and looks like the sai is on pin 9 or 21 but the diagrams i got seem to be missing data. Gonna get an erwin sub and see if I can use the interactive diagram to pin it out. Should be a straight forward task to wire into the ecu.

[@blahbergerpoke]

​@datadrivenmqb Do you use Mode 22 or 3E and do you by chance have the address and formula you use to log the pcv sensor? I'm gonna try to build a harness for this sometime next week wanted to get Simos tools setup.

[@scottli2436]

If I already change APR DTR6054 turbo come with turbo inlet break pcv systems？ like this can I use mk8 pcv kits？

[@datadrivenmqb]

No idea, haven't tested it. But based on my findings now it appears 19+ are more likely to be successful w/ a MK8 retrofit.

[@scottli2436]

@@datadrivenmqb if i use mk8 pcv retrofit kit can i change oem turbo inlet？

[@datadrivenmqb]

@@scottli2436 the Venturi makes up for the lack of vacuum non-oe inlets cause. Yes.