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Thread: Shifter rod vacuum at idle

  1. #1
    Join Date
    Sep 2011
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    Brisbane
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    Shifter rod vacuum at idle

    Hi
    Any thoughts on this one?
    Bora auevr6, it’s been intermittently surging
    Bad response rotten egg smell(over fuelling) one minute then great the next.
    O2 sensors are 10month old. MFA replaced
    No change.
    I found a vacuum leak from the shifter rod actuator, plugged back in, but now it’s down(fully actuated) at idle

    Can’t find any other vacuum leaks


    Sent from my iPhone using Tapatalk
    1990 MK2 Golf GTI

  2. #2
    Join Date
    Sep 2011
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    In case I have the wrong term
    To clarify what I mean see picture this is down at idle


    Sent from my iPhone using Tapatalk
    1990 MK2 Golf GTI

  3. #3
    Join Date
    Sep 2011
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    Update I checked the n156 valves they are operating. From what I can tell the n156 valve closes on startup, it shouldn’t until 4100rpm. Only other thing I can think of now is the ecu thinks the engine speed is over 4100rpm. I could have this all wrong though


    Sent from my iPhone using Tapatalk
    1990 MK2 Golf GTI

  4. #4
    Join Date
    Apr 2014
    Location
    Penrith, NSW
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    Curious, how did you confirm the n156 valve is operating?

    Also any noise coming from the manifold? Specifically near the change over barrel?

  5. #5
    Join Date
    Sep 2011
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    Brisbane
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    Good news, I was (still am) a idiot
    I switched the shifter rod control (n156) and the sai valve plugs oops

    It’s a tight space to work in without removing the radiator.

    She is now behaving nicely.


    Sent from my iPhone using Tapatalk
    1990 MK2 Golf GTI

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