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Thread: Total Airflow Channel Swinging Wildly

  1. 05-31-2016 #1
    06300CSRT8
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    Total Airflow Channel Swinging Wildly

    Anyone else notice this type of behavior? No other channel shows a reason why the airflow would be rising and falling this much, literally in one frame will be 374g/sec then be 1100g/sec next frame. There seems to be no reaction to it changing, either. Injector pulsewidth, manifold pressure, etc all stay constant.

    Tune 4 WOT.hpl
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  2. 06-02-2016 #2
    ElecTech
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    I always see this. Even using Diablo logger. I'm not sure if it is how the ECU's calculate it or how it gets reported, but it seems very unreliable for any real mapping.
    Jaime
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  3. 06-02-2016 #3
    06300CSRT8
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    I have a feeling its showing when the PCM switches from sensed map to calculated. I can basically prove out both of the values, the lower numbers tie to the math of Airflow = (Torque - Offset)/Factor and the higher number (sensed) its tying pretty close to my blowers max airflow potential around 120lbs/min or about 1700 CFM. This must be the torque diagnostic process were seeing, but since I have the limits allowed maxed out it never does anything with the massive difference.
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