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Thread: Help Interpret LTFT

  1. #1
    Tuner in Training
    Join Date
    Jun 2014
    Posts
    19

    Post Help Interpret LTFT

    I have No idea whats going on with the fuel trims here.
    Can someone give me some insight as to whats going on?
    I have included the logs as well as tune and configuration files.
    vehicle cam from the factory with DOD and E85 but both are disabled.
    Attached Files Attached Files

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    8,171
    Are you really running E0 pump fuel or are you running the standard E10 that is offered at pretty much every pump running 87,89,91 octane?

    Change the stoich to 14.2 if E10 and reset the trims.

    Past that I don't see a "huge" problem with the trims. Sure they are more positive at time but I've seen stock calibration that were worse. You can take the time to dial the fueling back in to get them closer to zero if you want.

    Clean the MAF if you haven't yet too, do a tune up if it's never been done.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

  3. #3
    Tuner in Training
    Join Date
    Jun 2014
    Posts
    19
    Okay so new problem, Flashed it back to stock and now I get the error of "Unlicensed vehicle" When I have definitely bought the credits for the tune file and the ecu multiple times. I have tried resetting the ECU and the laptop. No Dice.
    HPtuners doesn't treat their customers very well. This has happened to me before, it just wouldnt re-flash again without more credits for no reason.
    Can someone help?