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Thread: CMC High RPM Fueling

  1. #1
    Lifetime Member comnrailpwr's Avatar
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    Default CMC High RPM Fueling

    Any plans to find the limiters in this ECM causing them to pull fuel at 3400 and not go over 4000rpm?
    Last edited by comnrailpwr; September 27th, 2017 at 01:04 PM.

  2. #2
    Lifetime Member Road's Avatar
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    Try this
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  3. #3
    Lifetime Member 2007 5.9's Avatar
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    Quote Originally Posted by Road View Post
    Try this
    You can set them to 8000 and it doesn't matter, CMC pulls fuel 35-3700rpm. Only those who have CAX their own way, have high rpm.
    Les Szmidt
    2007 5.9 Dodge Ram
    2014 Ram 3500 Aisin tuning Emissions Equipped
    EFI Live Cummins BETA Tester
    Silver Bullet Tuning
    silverbullettuning@gmail.com
    www.youtube.com/ljszmidt
    http://www.facebook.com/SilverBulletTuninig

  4. #4
    Lifetime Member comnrailpwr's Avatar
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    Correct. Was hoping efi would work on a fix for this at some point. Would be nice to not have to convert ecms on these trucks.

  5. #5
    Lifetime Member 2007 5.9's Avatar
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    Quote Originally Posted by comnrailpwr View Post
    Correct. Was hoping efi would work on a fix for this at some point. Would be nice to not have to convert ecms on these trucks.
    They did for the CMD and CME controllers, so I can't see why not for the CMC. And yes I agree, not having to ecm swap would be very nice.
    Les Szmidt
    2007 5.9 Dodge Ram
    2014 Ram 3500 Aisin tuning Emissions Equipped
    EFI Live Cummins BETA Tester
    Silver Bullet Tuning
    silverbullettuning@gmail.com
    www.youtube.com/ljszmidt
    http://www.facebook.com/SilverBulletTuninig

  6. #6
    Forum tyhee Site Admin GMPX's Avatar
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    CMC code is quite different to the later ECM's. I really struggled in many areas with the CMC ECM, it kept me up at night many times!!
    Let me ask around


  7. #7
    Lifetime Member Road's Avatar
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    Quote Originally Posted by 2007 5.9 View Post
    You can set them to 8000 and it doesn't matter, CMC pulls fuel 35-3700rpm. Only those who have CAX their own way, have high rpm.
    EVERYTHING needed is in EFI. No cax file or editing outside of EFI needed.

  8. #8
    Forum tyhee Site Admin GMPX's Avatar
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    Thanks Mike, good to know (I really wasn't sure myself).


  9. #9
    Lifetime Member comnrailpwr's Avatar
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    Quote Originally Posted by Road View Post
    EVERYTHING needed is in EFI. No cax file or editing outside of EFI needed.
    So you are saying I can get 5000rpm full fuel with the CMC ecm with what is currently mapped out, irregardless of OS used and with CSP format? Because that's what I'm after.

  10. #10
    Lifetime Member Road's Avatar
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    Quote Originally Posted by comnrailpwr View Post
    So you are saying I can get 5000rpm full fuel with the CMC ecm with what is currently mapped out, irregardless of OS used and with CSP format? Because that's what I'm after.
    Yes

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