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Thread: 2010 Camaro E38 Air Calc Mode Sometimes Shows "Unknown"

  1. #1
    Senior Tuner
    Join Date
    Sep 2008
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    2010 Camaro E38 Air Calc Mode Sometimes Shows "Unknown"

    I added air calc mode to my scanner to try to understand what's going on. I see it switch between normal, high speed, and unknown.

    What's going on there?
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat

  2. #2
    Bump.

    2008 E67 (TBSS)

    During a WOT throttle run with SD fueling, with the MAF failed (correctly), High-RPM mode disabled, etc. I see the Air Calc Mode PID shows normal until about 4,200 rpm then jumps between "Hi Speed" and "Unknown" until the shift brings it back below 4,200 rpm.

    Normal?