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Thread: MAF Doing something crazy on dyno?

  1. 01-16-2021 #1
    Brad Brand
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    MAF Doing something crazy on dyno?

    Can someone please help or explain why my maf lbs/min drops and comes back on these 4th gear dyno pulls?
    Thanks



    Dynorun 66.hpl
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  2. 01-17-2021 #2
    dhoagland
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    You will get better response if you post a tune
    Look at you Accelerator petal % vs your TPS... Looks like something is closing the throttle while you still have petal pegged...
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  3. 01-17-2021 #3
    Brad Brand
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    Here Is a Road Test with it doing it.




    BBB good file for 2021 ver 12 stock LT4 VT Tables.hptRoad test 1-16-21-6.hpl
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  4. 01-18-2021 #4
    LSChev
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    You're way out of fuel system. The ECU is closing the throttle to try and save itself.
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