m20 bogs down at 4k

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  • PimpinWalrus
    Advanced Member
    • Oct 2013
    • 170

    #1

    m20 bogs down at 4k

    After swapping chassis' the m20 has been giving me some problems. At first it bogged down around 4k at WOT, but after driving around for a bit i can barely give it 1/2 throttle before it bogs and loses power to the point where it will stall. I also noticed i had a huge coolant leak and once i plugged that up it drove much better, just bogs at WOT again. Could this be caused by improper coolant bleeding? I have been struggling to get the last bit of air out.
    '86 Delphin 335i turbo -
    '88 Schwarz 325i -
    '94 w124 e420 -
    Turbo m30b35 Build Thread
  • 3vilE30
    Grease Monkey
    • Jan 2013
    • 344

    #2
    Check your plugs?
    I had really bad jerking, bogging whenever I went near wot. Changed the plugs drove it hard a few times and went away. Test the TPS as well.

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    • efficient
      No R3VLimiter
      • Feb 2012
      • 3312

      #3
      Afm might cause power loss

      Comment

      • 603Racing
        Mod Crazy
        • Dec 2010
        • 612

        #4
        If it runs fine at high RPM at 3/4 throttle, but not at WOT, it might be your TPS as 3vilE30 stated.
        90 325i DD/Track
        03 Durango 5.9


        Originally posted by e30mpg
        It is recommended to get new gasket but this is R3v and we just copper spray that shit......slap biotch on and tighten to tq.

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