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Thread: Mother thumper cams 3v

  1. #1
    Advanced Tuner
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    Feb 2019
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    Mother thumper cams 3v

    I?m having an issue with misfire only at 2000-3000 rpm idle-2000 is great, and 3000-redline is great. I?m showing no knock, CEL, or IPC error, ETC error or torque error. But for whatever reason just at that certain rpm it bucks or misfires. I?ve tried spark, too in management, driver demand, ect. The cams are completely locked and VCT is disable. I will post tune when I?m home. Just curious if any body has experienced this

  2. #2
    Advanced Tuner
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    try a fuel pulse damper

  3. #3
    Senior Tuner SultanHassanMasTuning's Avatar
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    its tuning

    with cams your load is different at that load

    you will need to adjust spark so you can rev freely
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  4. #4
    Advanced Tuner
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    Feb 2019
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    Talking

    motherthumpr_91_airraid_lt.hptmotherthumpr_91_airraid_lt.hpt here's the tune, o far I've added 7 degrees of timing to the load area 40% and 60% for the whole entire rev range. I would like someone to look it over just to be sure that there's noting else im missing. That would be much appreciated