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Thread: SR20det weird shaky stall issue under no load

  1. #1
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    SR20det weird shaky stall issue under no load

    Hi i have a 1996 s14 sr20det zenki . I have a serious problem lately and i cant find any people who has similar problem.

    Problem is when i drive my car engine tends to stall under 3k rpm.İt doesnt matter which gear i am in . For example if i drive on the road 3rd gear it pulls great but when i drive normal and rpm drops under 3k car starts to shake and try to stall. Or i am driving on highway on 5th gear downhill! and rpm drops under 3 k car starts to shake and try to stall.İ cant find the problem.Other than car pulls great at steady afr. My specs are

    sr20det with vtc (s14 version)

    oem engine
    fmic
    tial bov
    tial external vaste gate
    oem injectors
    aem fpr
    walbro450
    audi r8 coil pack
    stand alone ecu( with map reading , i dont use maf)
    innovate afr
    exedy stage 4 clutch
    rocker arm stopper
    cometic head gasket

    Recently built engine.I am suspecting from timing or worn out camshafts.Or fuel pump.

    What is your opinions?

    thanks for your help. Great communuty.

  2. #2
    Guest hooky's Avatar
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    What ECU do you have? virtually all Stand-alones will have a DATA logging facility either to an external memory or connected to a laptop.

    The data log should help pin down exactly where the issue is.

  3. #3
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    Quote Originally Posted by hooky View Post
    What ECU do you have? virtually all Stand-alones will have a DATA logging facility either to an external memory or connected to a laptop.

    The data log should help pin down exactly where the issue is.
    My ecu is SPARK EMS.. We checked with my tuner he is also a pro tuner and he cant pin the problem he says no info on ecu. Car pulls great accelerate like hell but when decelerate its starts to shake on 3k rpm even downhill -_-

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