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Thread: Audi TT mk1 1.8t 225 quattro wandering / surging idle - no codes

  1. #11
    Verified VCDS User
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    Earlier when I clamped "most" of the vacuum lines, apparently I didn't clamp the PCV line. When I clamped the PCV line, there was no surge on engine start and it immediately seems to run like normal.

    The challenge I have now is the same I opened this thread for -- I can't find the right part online to replace that "Y" valve. All the parts I found look significantly more complex.

    My hoses:
    https://ibb.co/bVhC7R
    https://ibb.co/cStkSR(orange fill stick in foreground is what the hard line off the "Y" connects to)
    https://ibb.co/dkcZMm
    https://ibb.co/ga93E6 (bottom left of this pic shows the stuff that's centered in the other pics)

    The top end of the "Y" in the pic is a hard line that connects to the fill tube. That line seems OK as far as I can feel/tell. I believe it's the "Y" valve itself.

  2. #12
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    Ok .. it was off to the side in the parts diagram..

    http://www.oemepc.com/audi/part_sing.../254631/lang/e

    Part 5 is apparently cancelled, and part 10 doesn't seem to show in the list on the right, but based on what I see, I assume I have to replace the whole assembly.....

    Making headway.

  3. #13
    NostraJackAss Jack@European_Parts's Avatar
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    An FYI:

    If the car was not FOD as aforementioned & for being with modification & deletes, you would of been able to use the trim values/OXS aging to determine a vacuum leak, using the functions of the OBD2 with VCDS.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  4. #14
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    I just looked at three of the aftermarket companies we deal with up here and part #5 06A103221BH is not a problem to get. Maybe have a look at World Pac down there.

    Kevin

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  6. #15
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    I might have missed something but I think number eight is the valve you're looking for

  7. #16
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    Quote Originally Posted by ivagp View Post
    I might have missed something but I think number eight is the valve you're looking for
    Yes, for the valve portion he needs 8 or 10 depending on his application.

  8. #17
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    Thanks for the feedback guys. I was double checking my diagnostic and ended up ruling out the PCV. I took it to a shop and they identified the defect as the suction pump (06A133751AA). Ordered and it should be in this week.
    Last edited by harr2969; 01-30-2018 at 11:58 AM.

  9. #18
    NostraJackAss Jack@European_Parts's Avatar
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    Thanks for the feedback guys. I was double checking my diagnostic and ended up ruling out the PCV. I took it to a shop and they identified the defect as the suction pump (06A133751AA). Ordered and it should be in this week.
    Did you learn anything yet?
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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  10. #19
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    Well, I'm getting closer to learning my own pain tolerance.

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  12. #20
    NostraJackAss Jack@European_Parts's Avatar
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    Thresholds are important for pain and AECD's!
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
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