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Thread: Commanded Eq Ratio

  1. #1
    Potential Tuner
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    Dec 2020
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    Commanded Eq Ratio

    Any help or information would be great...
    Tuning Maf only, Dynamic air flow set to high, cot>disabled, dfco>set to high, fuel trims set to open loop.
    Question I have is when I load the tune why is my commanded eq ratio reading .952 instead of 1??
    This is on a E39A ECM for a lfx 3.6L.
    I know this is on a Gen V forum but should be similar, still torque based setup

    Appreciate any information..

  2. #2
    Senior Tuner Ben Charles's Avatar
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    Bc it’s going off IVT and most the time that table never reaches 1.0 or if it does it over 250 IVT

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  3. #3
    Potential Tuner
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    Dec 2020
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    So I'm fairly new to this.
    In order for me to tune in MAF only should I just continue to tune to achieve 1 lamda which would be my commanded .952 Lamda the way it is setup now, or do I need to make adjustments to the IVT Gain A Or B? I see that B is with 10% alcohol and A is Zero alcohol?
    Maybe if you have an easier way to tune MAF only that would be awesome. I can send you my tune.
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  4. #4
    Tuner in Training
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    Dec 2019
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    I would suggest tuning to your commanded, and if you don't like your commanded target deal with that as separate issue.
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