Ive also had issues with the throttle that acted exactly like a bad TPS. So naturally, I figured these two symptoms were related.
I T-pinned the TPS and found that there was 5 volts at the signal wire all the time. I bench tested the TPS and the resistance checked out fine. I replaced the sensor with a newer style TPS and connector since the older style connector I had appeared to be internally shorted. After replacement, it tests out fine.
Same shifting and throttle issues still, though. Granted, this could be two separate issues, but it seems too related. I guess it always could be a bad TCM but that doesn’t explain the throttle issues. I don’t like to throw parts at vehicles. That’s not how I fix cars.
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