Found it, was a ETC rpm limiter, not very much scanning capability on these tcms :/
Found it, was a ETC rpm limiter, not very much scanning capability on these tcms :/
Last edited by crash01; 10-01-2019 at 04:41 PM.
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.