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Thread: 1000% Inj. Duty Cycle at Idle

  1. #1
    Potential Tuner
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    Sep 2019
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    1000% Inj. Duty Cycle at Idle

    Good morning.
    I've upgraded my injectors to Ford MU52 because I'm adding turbos. I plugged in the calibration numbers and checked them a dozen times, the car is running well with no issues, but Injector Duty Cycle is over 1000% at idle and I've seen it as high at 12,000% in other logs.

    I never logged Inj Duty Cycle before upgrading the injectors so I assume I have something else set up incorrectly. Any ideas?
    Thanks
    Attached Files Attached Files

  2. #2
    Advanced Tuner
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    Apr 2018
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    Injector duty cycle? Where do you see that lol.... Injector pulse width??? Yeah I'm pretty sure that's a broken reading.

    Try updating your HP Tuners and then re-poll the vehicle for supported parameters. Also get rid of those (SAE) channels, they are slow, and use the regular ones which are much faster.
    Knock Retard is the reduction or prevention of knock by lowering ignition timing:

    (+) Adding Knock Retard = Reducing Timing. PCM is seeing knock.
    (--) Lowering Knock Retard = Increasing Timing. PCM isn't seeing knock.
    __________________________________________________ ________

    2014 Mustang GT Premium. VMP Gen2R Supercharged with an FTI 3000rpm Converter. JLT, BMR, Steeda, Viking, etc.
    Don't fix it if it ain't broken | Maximum effort gets maximum results

  3. #3
    Senior Tuner veeefour's Avatar
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    it's ms not % but still something very wrong with that pid

  4. #4
    Tuner in Training kareltuning's Avatar
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    It is reporting as X,XXX.XXX which is notation common in half of the world countries, nothing wrong. Your settings are probably set to display as that. In US that would be 1.xxx ms, yours is 1,xxx.xxx ms

  5. #5
    Advanced Tuner
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    i have in my SCT Data for [email protected]
    Low Slope @ 0.017711
    HIGH Slope@ 0.015851
    BRKT Point @0.0000162600
    PUle Width @ 0.730

  6. #6
    Advanced Tuner
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    Quote Originally Posted by mstang_man View Post
    i have in my SCT Data for [email protected]
    Low Slope @ 0.017711
    HIGH Slope@ 0.015851
    BRKT Point @0.0000162600
    PUle Width @ 0.730
    The 13-14 GT-500s use MU52s as well yet the data in their stock tune is:
    Low: 0.0205530
    High: 0.0157970
    BrkP: 0.0000140
    PW M: 0.456

    What I don't understand is why is it different. Is your data for Coyote Fuel system vs GT-500 Fuel system? I've been using the stock data for GT-500 on my Coyote but I got it trimmed out nicely tuning MAF.

    If this is right for a Coyote then maybe I should use these values and re-tune.
    Knock Retard is the reduction or prevention of knock by lowering ignition timing:

    (+) Adding Knock Retard = Reducing Timing. PCM is seeing knock.
    (--) Lowering Knock Retard = Increasing Timing. PCM isn't seeing knock.
    __________________________________________________ ________

    2014 Mustang GT Premium. VMP Gen2R Supercharged with an FTI 3000rpm Converter. JLT, BMR, Steeda, Viking, etc.
    Don't fix it if it ain't broken | Maximum effort gets maximum results