Trying one more time. I have a 2017 L83 swapped into my 1980 C10. Engine start and runs fine while in Park/Neutral. As soon as you put in Reverse or Drive I lose throttle input. You feel the trans shift into gear but pushing the gas pedal does nothing. RPMs will not rise even though it shows I am commanding pedal. The moment you put it back in Park/Neutral you can rev it to the moon. Both Pedal and Throttle body have been replaced trying to find the issue with no luck. Has anyone had this issue and how did you solve?
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