Here's what happens: First of all, I get ZERO CEL or any other symptoms. The truck runs great. However, especially when towing up steep grades, the throttle will immediately cut out. I can even feel it in the pedal. If I release the pedal and put it back down it's good to go again. It's very random, but mostly happens when I have it to the floor and the truck is under load (uphill, towing, etc...). No backfires, misfires, no CEL, it's really weird. Unfortunately it is a momentum killer when going up the passes with the trailer. I've only had it happen in 2nd or 3rd gear with it floored and at higher RPM. Anyone ever experience this?
EDIT: It's on a 1998
EDIT: It's on a 1998