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Thread: 2014 Mustang GT rev limit patch wont work

  1. #1
    Tuner in Training
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    Question 2014 Mustang GT rev limit patch wont work

    Hey guys,

    After applying the rev limit patch, car will still rev up to 7500-7600rpm. Not more.
    Maybe there are some other tricks and magic involved to rev it to 8000-8200rpm other than rev limiters?

    Many thanks for any help!
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  2. #2
    Advanced Tuner small tuner's Avatar
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    Nov 2015
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    what is the maximum rev limit gen 1 coyote can go after applying rev limit patch ?

  3. #3
    Tuner in Training
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    Without patch it cuts at 7100rpm.

    Other guys manage to rev up to 8150rpm with patch. But this coyote, for some reason, won't rev that high.

  4. #4
    Senior Tuner veeefour's Avatar
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    Make sure you are not hitting OSS limit anywhere.

    Try raising CHRONO.

    Not sure why you have max retard rpm set to 500 and why you disabled knock.

    Also ETC torque vs rpm has to be raised.

    No offence buddy but this tune is butchered.
    Last edited by veeefour; 07-24-2019 at 02:15 AM.

  5. #5
    Advanced Tuner
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    he's prob also hitting the EOT and TOT rev limits...jsut applying the path doesn't let you rev higher, you still need to make sure everything else in the tune will allow it. All the patch does is apply some of the Boss coding to raise the hard limiter to 8100

  6. #6
    Advanced Tuner
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    ETC torque management
    MAF fail RPM
    chrono limits

    stand out as [possible causes

  7. #7
    Tuner in Training
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    You mean the Chrono disable @ Desired airmass tab? Raising from 7500 to 8200?
    fail RPM @ Mass AirFlow Sensor @ Engine Diag?
    Torque Max vs RPM @ ETC torque management?

    Many thanks!

  8. #8
    Potential Tuner
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    Jul 2019
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    Have a Q about the patch. Sounds like you take a bone stock tune, activate the OS patch in VCM edotor, rename file and load to car with no other changes. Then, I assume, pull that tune and examine to discover rpm limit can be raised. Is that the procedure?