E30 all new- won’t rev past 3-4-5k depending on CKP adjustments

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  • Rutech13
    Noobie
    • Mar 2026
    • 2

    #1

    E30 all new- won’t rev past 3-4-5k depending on CKP adjustments

    Hi everyone.
    I got 88 325e with 325i engine/harness/ecu/dash in it .
    I got this car in barely running condition but after a full ending rebuild,new head was also installed .
    im fighting ,what seems to be a simple problem at first ,a nightmare if my days .
    Car will not rev past 3000 rpm,no matter at WOT or half throttle or even driving. All kinds of test and swaps and new parts done to it-nothing.
    But here is a catch that stomps me . If I go and adjust CKP bracket all the way out and put few shims under sensor ,it brings me way out of recommended specs,but-car will rave up to 4000-4300 now-if I mess with it more I can achieve 5000-5300 but in that condition it takes more that 5 seconds of cranking to start it .
    With that said-least start a discussion so I know what info y’all would want me to provide .
  • Rutech13
    Noobie
    • Mar 2026
    • 2

    #2
    I’ll throw out here what have been replaced:
    4 ecu’s(all kid of numbers)
    4 CKP sensors (2oem ,1hella,1chinise)
    FPR (oem was good but I still put hella I believe )
    3 fuel pumps ,all tested good (bosh oem in it now)
    2 TPS (oem and hella) both tested as they should
    3 AFM -all tested perfect but still swapped it
    Harmonic balancer
    CKP sensor braket
    Coolant temp sensor ECM side
    plugs
    3 engine coils
    vlaves adjusted
    fuel drained and refiled before pump replacement
    Bosh fuel filter
    ICV was good but still cleaned it just to make sure .
    Grounds and powers are secured
    alternator puts out 13.5 at idle
    fuel pressure 38-42 psi at idle,45 ish at WOT
    Fuel delivery 30sec/30oz

    Got no stomp test on any of those ecu’s but connected the scanner and got no codes .

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