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Thread: High long term fuel trims at idle >

  1. #1
    Tuner Turbo6TA's Avatar
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    High long term fuel trims at idle >

    2011 Corvette LS3 with supercharger and a fairly mild aftermarket cam (220*/234* . .585"/.585" . 118* LSA . +9* Overlap) .. using 93 octane pump gas
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    Just wondering if this is ok ... During idle with the engine at normal operating temp, my long term fuel trims (LTFT) on both banks sets right at between +8% and +9%

    The car runs great but I was just wondering if my idle fuel trim is a little too high.

    I guess I should check it again and see what it looks like at a steady 75 mph cruise speed.

    Thanks for any input ..


    Last edited by Turbo6TA; 04-25-2022 at 09:37 AM.

  2. #2
    Tuning Addict 5FDP's Avatar
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    I wouldn't care one bit if my fuel trims were like that only at idle with the amount of mods this engine has.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner Turbo6TA's Avatar
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    Maybe I shouldn't even be concerned with this ...