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Thread: 2016 L83 8L90 Standalone WOT Stumble

  1. #1
    Potential Tuner
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    Oct 2024
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    Ishpeming,MI
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    2016 L83 8L90 Standalone WOT Stumble

    I have a junkyard 2016 L83 8L90 from a Tahoe in a 56 chevy truck. I've done all the harness and ECM programming myself. The internals are all stock. I have a custom cold air intake (same diameter as stock). Stock manifolds, 2.5" exhaust, no cats and borla mufflers. I am no expert, this is my first go at standalone. I am experiencing a stumble/rev limiter (backfire) at about 4800 rpm. On the data log I can see the high pressure fuel drops dramatically when it stumbles. I have disabled the DOD. Not sure I have disabled everything I need to.

  2. #2
    Potential Tuner
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    Oct 2024
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    Ishpeming,MI
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    I am also getting a lean code