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Thread: 5.9 JTEC+ Spark Algorithm

  1. #1
    Potential Tuner
    Join Date
    Feb 2020
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    5

    5.9 JTEC+ Spark Algorithm

    As above, 99 Durango 5.9.
    Can someone lay out the formula so I don't have to test every item in tab.

    I suspect it's Base EGR ON OR Base EGR OFF OR Warm (1 of 3 tables) offset by IAT or ECT and/or...

    THX!
    99 Durango 5.9
    16 Challenger 3.6

  2. #2
    Potential Tuner
    Join Date
    Feb 2020
    Posts
    5
    UPDATED!
    I could still use some guidance.
    I am changing advance in the EGR off and warm tables, making runs to gym, and not seeing changes.
    So..., going through other parameters and zeroing thing, still just non-identifiable changes.
    (By this, I mean Scanning RPM, Speed, TPS, MAP, Spark, IAT and ECT, comparing data to 'formulas' in Editor to find correlation.)
    I'm down to:
    I'm not doing something to kick the new parameters in - so I just tried the +cable to ground KO scheme OR
    HPT mislabeled EGR ON/OFF and I'm running off the one I should not even have (No EGR).
    THX any!
    99 Durango 5.9
    16 Challenger 3.6

  3. #3
    Potential Tuner
    Join Date
    Feb 2020
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    5
    OK, still not the progress I would think I would see.
    Here are base files; scanner log would have been my first incremental advance adjustment.

    (The BASE is unaltered except for early dealer 'death' flash)
    Attached Files Attached Files
    99 Durango 5.9
    16 Challenger 3.6

  4. #4
    Potential Tuner
    Join Date
    Feb 2020
    Posts
    5
    And my last set, trying to see advance changes.
    I see 40 for advance (in 'middle' of chart) no matter what.
    I've got the 'middle' of 1 table at 44, the other at 35 just to try to see a change I can identity.
    Attached Files Attached Files
    Last edited by tshephard; 06-10-2021 at 05:47 AM.
    99 Durango 5.9
    16 Challenger 3.6