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Thread: l83 6l80 swap no start crank

  1. #1
    Tuner
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    l83 6l80 swap no start crank

    ready to pull out what hair i have left... verified all that i know an done all the research i can. she wants so bad to start it just wont.ive had it running before an have drove around the block.it made a couple gear changes an was happy with the results.now she cranks al day an will not run.posted tune an log.begining think i have a fried ecu.
    Attached Files Attached Files

  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Rogers, MN
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    Something is wigging out with the wiring or the computer.

    The MAP sensor is going crazy and the o2 sensors are pegged 1,192mv.
    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
    Tuner
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    so i believe i traced my mistake only way i can get o2 volts down is either plug in 02 backwards or swap with another ecm.this is how i think i have corrupted the files on ecm i had swapped ecm out without disconnecting hp tuners. any insight on this iam new like 4 mo. to all this newer can buss auto tech 2005 an newer.i went an got another ecm 38 bucks shipped. how woukd i go about not frying this one also?

  4. #4
    Tuner
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    i have verified wiring an checked all circuit are correct why ive been stumped