Hey guys I'm really stuck on a truck it's 2000 Chevy k3500 with the 5.7 and I replaced all 02 sensors plugs wires distributor cap timing and tps and nothing is working it has no power anymore if I go over half throttle it sputters and won't shift but the second I let off it runs and shifts great also cats are good.. please help snows almost here and we need all the trucks up to par thanks.