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Thread: GlobalB -> STFT/LTFT always at ZERO

  1. #1
    Tuner in Training
    Join Date
    May 2008
    Posts
    46

    GlobalB -> STFT/LTFT always at ZERO

    Started my C8 after a winter, I just noticed my STFT and LTFT are always ZERO no matter what... i know they should be in NEGATIVEs since WB is reading 0.87 at idle..
    what gives.?? did something change in scanner ? i do have latest BETA.

  2. #2
    Advanced Tuner rabbs88's Avatar
    Join Date
    Jan 2023
    Location
    NY
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    273
    Post your tune and log.

  3. #3
    Tuning Addict
    Join Date
    Jan 2015
    Location
    Franklin, NC / Gainesville, Ga
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    6,861
    Most likely failed a fuel control self test especially if it's that rich. Try it a couple more times then check for codes.

  4. #4
    Tuner in Training
    Join Date
    May 2008
    Posts
    46
    For some reason VCM was reporting NO DTC, but dash light way on...

    it was failing a check and just disabling LTFT/STFT