[BR3W CITY]

Sounds like the pedal is having an issue with its position sensor readings. If you put a meter on the signal wires on the pedal sensor(s) you can check for an abnormal voltage sweep. Iirc the normal sweep is 0-10v or 10-0v. Newer stuff has 2 position sensors that should read equally opposite, in order to double check each other....if that makes any sense. Search for TAC pedal voltage on ls1tech for a little more clear info. I'm on my phone and going off memory.