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Thread: Turbo 5.3 tune issues too rich no spark

  1. #1
    Tuner tonyvette's Avatar
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    Turbo 5.3 tune issues too rich no spark

    I have a mail order tune in my 2012 Colorado for now. Midmount 70mm with meth. Having issues with timing mostly. You'll see in the scan that timing spikes down to zero during boost. Anyone know why?
    scan 6-7.hpl
    mail order tune.hpt
    2012 Colorado 5.3
    Magnum 70mm turbo
    RevMax 2800 stall converter
    DevilsOwn meth

  2. #2
    Tuner tonyvette's Avatar
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    scan 6-10.hpl
    Here is a short pull I just made in 1st-2nd gear. I changed my meth nozzle from 3gph to 7gph before the run. Seemed to help, but as The Sultan has pointed out, I am still misfiring on bank 1. Plugs looked clean on one side, sooty on the other. They're Bosch platinum 6 heat range, gapped .035. Gonna log MAf Hz next. I'll be back
    2012 Colorado 5.3
    Magnum 70mm turbo
    RevMax 2800 stall converter
    DevilsOwn meth

  3. #3
    Tuner tonyvette's Avatar
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    scan troopers.hpl
    Scan showing MAF Hz and fuel pressure PIDs
    2012 Colorado 5.3
    Magnum 70mm turbo
    RevMax 2800 stall converter
    DevilsOwn meth

  4. #4
    Senior Tuner SultanHassanMasTuning's Avatar
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    much better, looks like your afr is around 10.9/11 or so
    Follow @MASTUNING visit www.mastuned.com
    Remote Tuning [email protected]
    Contact/Whatsapp +966555366161

  5. #5
    Tuner tonyvette's Avatar
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    This is latest scan with MAF Hz 9.00 and above multiplied by .95. Wideband AFR gauge shows richer (9.5 AFR) during boost with this change. Don't understand why...
    scan 6-10 late.hpl
    2012 Colorado 5.3
    Magnum 70mm turbo
    RevMax 2800 stall converter
    DevilsOwn meth