just went for a small cruise and noticed at light throttle problem. in town (25-30MPH) my truck started surging a little, RPMS bounced between 1500 to 2500 with a steady constant foot on the pedal. ive had this happen once or twice before. i heard the exhaust going with it so im not sure if it was tranny or motor related?
anyone else have this problem?

 

Mine did the same thing a couple times now right after pulling out of parking.

 

no idea what it is?

 

Return your canned tune to stock.