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Thread: 04 6.0 low idle

  1. #1
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    04 6.0 low idle

    I have a 04 6.0 with a turbo 400 behind it and having trouble with the idle being low 500 rpm in gear . Is there something i need to change to correct this?

  2. #2
    Tuning Addict 5FDP's Avatar
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    Increase the idle speed to 700.

    I think factory is like 525 or something.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
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    Quote Originally Posted by 5FDP View Post
    Increase the idle speed to 700.

    I think factory is like 525 or something.
    I have increased it to 625 but it is slow to respond when put in gear

  4. #4
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    With a T400 there is nothing telling the PCM if it is in P/N or in gear.

  5. #5
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    is there any thing i can do to make it respond quicker?

  6. #6
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    Can you wire up a park/neutral switch to your shifter?

    Post up the file that's in the PCM now, there's a few ways a switch on a shifter could interact with the PCM, you'd need to set it accordingly.
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
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  7. #7
    Tuner Howes's Avatar
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    simple question is your tb clean. they can only compensate so far before the idle speed ends up low its common in the trucks