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Thread: STFT spike to +25% briefly at low throttle input?

  1. #21
    Senior Tuner Higgs Boson's Avatar
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    Mar 2010
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    yes, if it happens after dfco, trims do add fuel back to return from the lean condition more quickly. works like that on fords I have tuned also.

  2. #22
    Senior Tuner Ben Charles's Avatar
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    Aug 2009
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    For what it?s worth every GEN 5 I?ve ever tuned has done this..
    Bothered me at first then, then realized not matter what I did it was going to happen

  3. #23
    Senior Tuner
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    May 2003
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    That sucks. I feel the timing jump sometimes when TMA returns to 0. I won't waste anymore time chasing it. Nothing I tried made any change whatsoever. Thanks guys.
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    Owner/GM Calibrator
    Gen V Specialist - C7 Corvette, Gen6 Camaro & CTS-V3