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Thread: AFR Oscillation at Gear Change + Rich on Decel

  1. #1
    Tuner in Training
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    Oct 2019
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    Canada
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    AFR Oscillation at Gear Change + Rich on Decel

    Tune and log files attached. Going lean/rich/lean with each upshift. And goes rich on deceleration. Any other issues that you see?

    2000 M6 Corvette with cam, CAI, LT's, FAST 36 lb injectors.

    Where do I look for resolution. VE table? Minimum injector pulse width? Minimum Fuel Milligrams?

    Thanks for your ideas.
    Attached Files Attached Files

  2. #2
    Senior Tuner
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    Mar 2011
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    Ripley, MS
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    DFCO has been disabled. That will cause the rich condition on decel.
    The cruise portion of the datalog looks mostly normal.

  3. #3
    Tuner in Training
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    Oct 2019
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    Canada
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    Thanks Kevin. Yes, DFCO could be used to cut fuel aggressively by adjusting MAP and RPM enter/exit levels. I was hoping for a more elegant solution? I am intrigued by your "mostly normal" comment - what looks off to you?