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Thread: @ HP Tuner Engineer: 3.0 Not Logging Engine RPM Correctly

  1. #1
    Senior Tuner
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    May 2015
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    @ HP Tuner Engineer: 3.0 Not Logging Engine RPM Correctly

    Check out the log attached, in both the instances I went WOT the Engine RPM PID seems wrong, comparing vs the turbine rpm and the calculated slip as a reference but also I can tell you for sure the rpms on the tachometer also climbed each time/each gear to 6700-6800 but mid way through each log of the pulls the rpms just kind of fade downwards. Is this just poling interval issue? Am I simply logging too many parameters? If that was the case, I would expect to see gaps in the log but not wrong data, meaning the log says RPMs are dropping but actually climbing until after the shift completes.

    3.0 Tune TCM Rev1 PCM Meth 9.hpl

  2. #2
    HP Tuners Owner Keith@HPTuners's Avatar
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    You have a lot of parameters for your application.

    This is an easy thing to test. Reduce the number of parameters and repeat the test. See how the RPM line reacts.
    We got this guy Not Sure, ...

  3. #3
    Senior Tuner
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    Thanks Keith, will do.