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Thread: Some help with Lean LTFT

  1. #1
    Advanced Tuner
    Join Date
    Feb 2006
    Location
    PAC NWest
    Posts
    396

    Some help with Lean LTFT

    I loaded my closed loop tune and went for a drive this afternoon. All the DTC tests passed and trims looked ok.

    I stopped at a store and stopped logging. When I came out I started the engine and started logging again. The I noticed 2 Lean codes, Bank 1+2, Immature.

    If you look at the log you can see the LTFT went to 25 right off while sitting at idle. When I pulled away the LTFT dropped and never went high again.

    Can someone tell me why this happened?
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