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Thread: Something seems off.... can this tune be looked at and changes suggested please?

  1. #1

    Something seems off.... can this tune be looked at and changes suggested please?

    1999 GMC sierra 2wd stlb. had 4.8. now has 2003 6.0, shorty headers, dual exhaust with xpipe, ebay CAI, TB bypass, stock 4.8 intake/injectors/TB, No EGR.
    also has a 4L65e. It seems to run fine, but it feels like it is missing something. this is my daily driver. Any suggestions are greatly appreciated!


    1999 60 4l65e trans.hpt
    drive to work.hpl

  2. #2
    Senior Tuner
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    Looking at your intake air temps in your drive to work log, do you work at the north pole?

  3. #3
    Senior Tuner
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    And you are way out of injector. 118% duty cycle at 5500 rpm.

  4. #4
    NW ohio... we are having some snow.... I have another set of injectors that I can swap in. I will get that done and then repost.

  5. #5
    well I won't be getting back anytime soon. The low mile 4L65e shit the bed yesterday. broken sunshell, no 3-4. same thing that happened to the original trans.