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Thread: MISSING 6.4 Parameters pcm/tcm torque issue

  1. #1

    MISSING 6.4 Parameters pcm/tcm torque issue

    Found it, was a ETC rpm limiter, not very much scanning capability on these tcms :/
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    Last edited by crash01; 10-01-2019 at 05:41 PM.

  2. #2
    Tuner
    Join Date
    Jun 2018
    Location
    Albuquerque New Mexico
    Posts
    121
    What are you using to get a RPM signal to the PCM? What does battery voltage look like? I'd check for good grounds and make sure the trans has a ground coming off it to the frame. i believe those trucks were very picky about that.