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Thread: Surging after Cam/Intake/Exhaust

  1. 06-14-2013 #1
    BoostControlled
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    Surging after Cam/Intake/Exhaust

    Trying to tune out the light throttle surging around 1,200 rpm in 4th and 5th gear.

    According to my logs it's happening from 1,050 to 1,200 at cylinder massflow around .28. The timing is shooting from 15-30-15-30 when this is happening. I go over to my timing map(s) and both low and high octane are stable and interpolated around 30* in that region. I have no idea where 15* is coming from. My coastdown table aren't anywhere near that either. AFRs jump between 14.0 and 15.5 when this is happening.

    Any ideas?


    BTW: This is a MAF based tune, no VE.


    _AK
    Last edited by BoostControlled; 06-14-2013 at 10:32 AM.
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  2. 06-14-2013 #2
    MikeOD
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    Post your tune.
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat
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  3. 06-21-2013 #3
    BoostControlled
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    I will Tomorrow. Thanks!
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  4. 06-22-2013 #4
    naf
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    When does ur maf kick in? Make sure you have it activate around 3000 rpm, the ecm reads the maf regardless, keepin it high keeps u from surgin at low revs
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