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Thread: Scanner is not showing misfires, what setting do i have wrong

  1. #1
    Tuner in Training
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    Scanner is not showing misfires, what setting do i have wrong

    I can feel a misfire sitting in the drivers seat at idle but scanner is not showing any misfires on any cylinder. Would be grateful to anyone who has time to take a look at log.
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  2. #2
    Tuning Addict 5FDP's Avatar
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    Does anything change if alter the idle speed up or down?

    I'd lower the idle timing too, 26-28 is pretty high for just sitting at idle. Try like 18-20 to see if it's way smoother.
    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 in Training
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    Thanks, I'm a newbie and was trying different timing to help with clutch chatter and stalling when taking off. will try reducing timing. Any idea why misfires aren't showing up.

  4. #4
    Tuning Addict 5FDP's Avatar
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    Must not be bad enough for the computer to pick it up. You're logging it but nothing is showing so it beats me.
    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.