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Engine PCM Vs EPC output / transmission line pressure signal problem

To close the one out - I did fix the issue. The problem was the PCM itself. Swapped the PCM and the force motor signal worked correctly. I also not longer have the TPS code, and the idle is more stable.
- TAW17
- Post #4
- Dec 17, 2018
- Forum: Engine Performance + Maintenance
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Engine PCM Vs EPC output / transmission line pressure signal problem

Code is P0221 - TPS low voltage. I have the frozen PID data from when the code occurs, and the TPS always shows a value (8% the last time it happened). I would expect to see 0% if the voltage truly dropped out of range. When the code trips, the PCM starts sending the ~0.1 amp signal to the...
- TAW17
- Post #3
- Dec 10, 2018
- Forum: Engine Performance + Maintenance
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Engine PCM Vs EPC output / transmission line pressure signal problem

1996 Tahoe - purchased it without engine. Replaced engine with GM longblock, and immediately found that transmission was bad (no forward gears). Swapped in rebuilt 4L60e from well respected performance transmission shop. Transmission shifts up & down as it should, but shifts at high RPM are...
- TAW17
- Thread
- Dec 9, 2018
- Replies: 3
- Forum: Engine Performance + Maintenance