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Thread: LTFT STFT reset question.

  1. #1
    Tuner
    Join Date
    Sep 2017
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    montreal
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    Question LTFT STFT reset question.

    hello everyone.
    after write vcm(change injector flow rate,) do i have to reset LTFT STFT Fuel trim?

  2. #2
    Tuning Addict 5FDP's Avatar
    Join Date
    May 2012
    Location
    Rogers, MN
    Posts
    13,564
    If you are using the trims to tune with, then yes you need to.

    You'll likely want to use a wideband o2 sensor though to check up on the airflow model because of the injector change.
    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
    Join Date
    Sep 2017
    Location
    montreal
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    58
    thanks