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Thread: Transient fueling and logging

  1. #1

    Transient fueling and logging

    Hey guys just started SD tuning and i was wondering if disabling transient fueling would help with lean and rich spikes while logging. This is my progression so far but still having issues of incorrect data.(i.e. Lean spots going back to rich after more data is input)speedd1.hptspeedd1 edit.hptspeedd2.hptspeedd2 edit.hptspeedd3 edit.hptspeedd3.hptspeedd4.hptspeedd4Edit.hptspeedd5.hptspeedd5edit.hpt

    Will include logs in a comment.

  2. #2
    Tuning Addict blindsquirrel's Avatar
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    Do not disable anything, just filter it out in your graph.

  3. #3
    I did not know you could set parameters to not record thats cool. I still am a little confused as to what i should do when logging for idle fueling and partial throttle tuning, as far as the variables go. ive been told to use TPS% as a variable for partial throttle but thats the extent to my knowledge.

  4. #4
    If you have PD blower, ensure your Cylinder Charge Temperature tables ECM 13001 and 13002 are set to all 0 for 13001 and 1s for 13002.
    I had similar issue earlier with idle leaning out as temperatures increased and the whole fueling getting screwed. Might not be your issue thu.
    You can try these filters for SD EQ graph.
    ([6310]<7 OR ([6310]<15 AND [6310]>7)) AND [2517.161.avg(200)]=0 and [2517.161.avg(-200)]=0 and (abs([50090.156.slope(250)])+abs([50090.156.slope(-250)]))<2 AND [6215.242]>80 and [2146.242]>210 and [50010.242]>187

  5. #5
    So thought id tinker with the variables a little bit after your example here.

    [50090.156]>50=0

    I used this as a filter for logging ltft idle and partial throttle. Would this do the job? Its supposed to filter out everything above 50% TPS.

  6. #6
    Senior Tuner
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    Quote Originally Posted by Z107 View Post
    So thought id tinker with the variables a little bit after your example here.

    [50090.156]>50=0

    I used this as a filter for logging ltft idle and partial throttle. Would this do the job? Its supposed to filter out everything above 50% TPS.
    https://www.hptuners.com/help/VCM-Sc...ghlight=filter

    If you want the data from when the TPS is less than 50% it would be [50090.156]<50. No "=0"and different direction for the arrow. The expression is telling it what to include (expression is true, use the data) not really what data to filter out (expression is false, don't use the data).

  7. #7
    Thanks for that ill give it a try!