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Thread: 2017 mustang gt man new ecm wont run

  1. #1
    Potential Tuner
    Join Date
    Jul 2023
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    2017 mustang gt man new ecm wont run

    8apr24 ecm2.hpt


    can anyone help me get this car running right? it has no cats no mufflers and longtube headers. just bought 2 weeks ago too much money in it to continue wasting money with no results. PLEASE HELP!

  2. #2
    Senior Tuner edcmat-l1's Avatar
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    Aug 2006
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    Where did the "new" ECM come from?

    Did you have it flashed with a Ford tool?

    Why was it replaced in the first place?

    Have you checked for codes?

    Did it run on the "old" PCM?

    Too much of the story is missing to be able to help.

    EFI specialist
    Advanced diagnostics, tuning, emissions
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  3. #3
    Advanced Tuner
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    Aug 2006
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    Arizona
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    It should run okay with those mods and a stock calibration. Something else is up. Please elaborate on the situation with this car. Was it demodded? Was it bought at an auction? Etc
    2009.5 PBM G8 GXP M6 W/Roof-Self tune, OBX LTs, Kooks axleback, LSA blower, cam,
    Monster LT1-SC clutch, flex fuel, 12 psi [email protected] 1,800 D.A
    2007 TBSS-Self tune, bolt ons [email protected], 1,900 D.A
    1991 GMC Syclone- Self tune/catback 12.8@104, 4,200ft D.A

  4. #4
    Senior Tuner edcmat-l1's Avatar
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    Need a crickets emoji......

    EFI specialist
    Advanced diagnostics, tuning, emissions
    HPtuners dealer and tech support
    email=[email protected]

  5. #5
    Advanced Tuner
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    Sep 2022
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    Lol definitely

  6. #6
    Tuner in Training
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    Jul 2019
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    PATS disabled?