Well what can I say I've tried just about everything and cannot figure this out. I've changed out the fuel pump, catalytic converter, O2 sensors, TPS, swapped out he MAF with another, spark plugs wires and coil and can't seem to find a solution at all. I still have rough idle when at operating temperature, and when I attempt to accelerate the truck completely gives up as if though the fuel was disconnected from it. If I floor it, it backfires in the intake and bucks. When I let off the accelerator there is a point where it'll get some power so I have to feather it back home when I'm out testing. Its not overheating, oil pressure is good, fuel pressure was tested. Put a vacuum tester on it and when I stepped on the gas most of the vaccum disappears so I assumed a clogged cat but new cat proved that to be wrong.
Had it scanned got code 111 and 159 (MAF) cleaned the MAF with cleaner and no luck. Please someone with same issue or similar resolved share your knowledge.