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Thread: Engine Reduced Power Help!

  1. #1
    Junior Member TorqueMonster007's Avatar
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    Exclamation Engine Reduced Power Help!

    Just Cal flashed my 2016 with a tune file i had been building and also installed a K&N intake that was off of my 14' i traded for this one. All things the same basically between my 14' and new 16' (5.3/6l80e) and other than the operating systems are different i had absolutley no problems with the '14. After the flash of my new 16' (built file from scratch and just based some parameters off of my 14') as soon as you crank it it displays Engine Power Reduced on the info screen yet there is no CEL even after driving and it is not actually in limp mode. Runs and drives like normal. What could this be?
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    Just as a test have you put the stock file back in to see if it goes away?
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  3. #3
    Junior Member TorqueMonster007's Avatar
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    No. Will be doing that shortly. I'm at work but have been comparing the stock with the modified and can't find anything at all that sticks out that would cause this unless the MAF needs to be rescaled for the intake? The Engine power reduced on the display yet no CEL and runs normal beats me.
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  4. #4
    Junior Member TorqueMonster007's Avatar
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    can i send you my file in PM and see if anything looks odd to you? ECM/TCM
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  5. #5
    Forum tyhee Site Admin GMPX's Avatar
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    Try the stock tune again before we get too carried away
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  6. #6
    Junior Member TorqueMonster007's Avatar
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    I just found 1 mistake. Had minimum map in the torque control at 20 min 150 max. stock was 15 min 150 max. could that be it?
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  7. #7
    Junior Member TorqueMonster007's Avatar
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    Will flash Engine Reduced Power at key on without cranking. Could this be hence to the Minimum MAP value being too high to sense? Will flash ecm/tcm stock tunes back and will have results in about 10-15 minutes
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  8. #8
    Junior Member TorqueMonster007's Avatar
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    does not do it with stock files loaded and intake on. only with the modified files loaded. What am i missing???
    2017 Sierra Denali Ultimate, 4x4, White Frost, 6.2/8speed, Leveled, 33x12.50x22 Trail Grapplers
    Stock for now
    Needs some T87A support love

  9. #9
    Joe (Moderator) joecar's Avatar
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    Post the files, if that's ok.

  10. #10
    Diesel Forum Support Site Admin
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    Quote Originally Posted by TorqueMonster007 View Post
    does not do it with stock files loaded and intake on. only with the modified files loaded. What am i missing???
    You've proven the issue is not software related, but tune related. If you post your tune files perhaps a tuner can chime in and offer you assistance.

    Cheers
    Cindy

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