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Thread: avg ltft and a/f plot

  1. #1
    Junior Member
    Join Date
    May 2005

    Default avg ltft and a/f plot

    1-How can i get ltft avg per ftc so i can average ftc- thru 14.
    2-is thier a way to chart air/feul ratio aross rpm range--how?

  2. #2
    EFILive Developer Site Admin Blacky's Avatar
    Join Date
    Mar 2003


    Create a map that mimics the LTFT matrix displayed by the Scan Tool (in menu option: "LS1/LS6->Longterm fuel trim cells" for your vehicle. See attached image for an example. I have also attached the MAP definition for the map shown in the image.

    You could log both banks individually, or you could create a calculated PID that averages both banks together and log the average in a single MAP.

    To map your AFR you will need a wide band O2 sensor.

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