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Thread: 2.3K boost problem

  1. #1
    Junior Member
    Join Date
    Jun 2016
    Posts
    1

    2.3K boost problem

    Hello everyone!

    I have pre-facelift w202 -95 2.3kompressor, with some mods.
    -23cm pulley
    -custom intake to kompressor, freeflow apex airfilter
    -4bar fuel pressure regulator
    -colder plugs 7, NGK, with 0.7mm cap
    -larger intercooler, aluminium piping
    -MAF moved closer to throttle body
    -cats removed, brabus back silincer

    I been fighting with this problem long time... without the bigger pulley car works just fine, but with the 23cm pulley car opens and closes by-pass when trying to accerlate full throttle, with half throttle car works. Car runs very lean, plugs are snow white and diagnostic says that "Too lean air/fuel mixture". I dont understand why car runs lean, many people has same upgrades, but still their cars runs perfectly. I tried clamping maf, new maf and new o2 sensor.

    I really appreciate your help!
    Regards from finland.

  2. #2
    Moderator
    Join Date
    Aug 2012
    Location
    SoCalif
    Posts
    1,011
    Original fuel pump? maybe it's getting weak

  3. #3
    You need to clamp the MAF signal at 4.6V ASAP!

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