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Thread: Please help. Trying to figure out this whole stft vs ltft tuning deal

  1. #1
    Tuner in Training gols1go's Avatar
    Join Date
    Jul 2011
    Location
    S.E. Michigan
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    16

    Please help. Trying to figure out this whole stft vs ltft tuning deal

    Please help me understand this whole stft vs ltft tuning thing. My ltft's were +25. Disabled them to dial in the stft first. Now my stft is between 0 and -7. Enabled the ltft again, now its in the +100's. What did I do wrong????? Mind you, it runs great with the ltft tune were it was +25. Runs like butt with them dialed in to -3 thru -4 LOL!

    Starting point
    Screenshot (5).png
    Screenshot (9).png

    End point
    Screenshot (6).png
    Screenshot (7).png
    Screenshot (8).png

  2. #2
    Tuner
    Join Date
    Oct 2011
    Location
    Australia
    Posts
    175
    Hey mate, looking at your end point LTFT graph, it is set on "Counts" set it to "A" which is average and is located just to the right of the "+" "-" signs above the graph. What it is showing you in that graph is the amount of times those cells have been hit while you were driving logging. Also on your AFR Error graph what have you set the data to? As it should be showing the error between commanded AFR and your wideband AFR.