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Thread: Mafless no run

  1. #1
    Advanced Tuner
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    Mafless no run

    I was thinking I might try a mafless tune so I disconnected the maf and turned off the DTCs for the maf.
    Start-up was normal but then it would die.

    Does that sound right?

  2. #2
    Tuning Addict 5FDP's Avatar
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    What vehicle?

    If the IAT is built into the MAF, you can't just unplug it. And if it's a GM car/truck you can't disable the DTC's, they need to be set to MIL on first error so it fails right away and goes into speed density.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
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    Its an LS1 GTO so the IAT is separate.
    So if its set to MIL on first, wouldn't you then be in an SES situation all the time?

  4. #4
    Tuning Addict 5FDP's Avatar
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    Uncheck the SES box.

    You want it to toss a MAF error so it doesn't use the MAF.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
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    I think I see.
    I'll give it a try. Thanks!

  6. #6
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    Yupp, that did it.

    Thanks again!