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Thread: Peth

  
  1. #1
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    Angry Peth

    Hi
    Can any one advise suggest solution I have tried everything!
    I have a problem with fuelling on my 2001 Zlet Coupe turbo. Runs very well and pulls cleanly during any warm up period but as soon as warms up problems develop.
    On full/deep throttle opening from about 2000 revs engine picks up normally to about 2750 then there is power drop which can last up to 5500 revs.
    Tech 2 shows throttle opening is being shut down to about 67% during this period. Tech 2 shows no ignition retard and all other parameters are normal.
    Over last 8 months have changed
    mass air flow meter
    mapp sensor
    Throttle body
    water Temp sensor
    Ignition module
    Plugs
    solenoid controlling waste gate actuator
    Even Engine Management unit has even been swapped with no improvement.

    Boost pressure and fuel pressure has been checked and is good with no air leaks and have used forte fuel infector cleaner, have checked all electrical connectors are pushed fully home.

    Car running on BP ultimate and has full miltek system with K+ N filter in airbox.

    Can anyone offer any advice.

    Thanks for your help
    Colin Petherick

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    Steve's Avatar
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    try changing the vacuum control solenoid, which is the same part number as the wastegate one, but is buried down the back of the intake manifold.

    Also check the pipework to the vaccuum system at that area.

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    Power loss problem ZLET

    Steve

    Thanks for your advice. I will try that as soon as I can get the part and let you know if it works. Take it its not an expensive part?
    best wishes
    Peth

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    TurboMark's Avatar
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    what about the boost control soleniod. See http://www.m1gst.com/vb/showthread.php?t=62412 Not sure if this i the same problem as yours but it seems like you have done everything else....
    Red.Dot + Turbo Dynamics VXR Hybrid + TX AutoSport 63mm FMIC = One Huge Smile

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    vcs / bcs is the same thing

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    Scotty boy

    VCS and BCS are both same part but two present one mounted beside turbo and the other on back of inlet manifold.
    Does any one know how the two link when throttle opened,
    Thank for reply.
    Peth

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    Enkidu's Avatar
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    I'd try a lamda sensor too.... The one on the pre cat... Try swapping it for the other one which is after the main cat... It could be a mixture problem......

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    Enkidu

    Thats my next move if solenoid replacement fails
    Thanks
    Peth

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