Gambithewigbandit

I also have the same problem with most of the same new/swapped parts except my 1992 Chevy 1500 5.7 is all original and in the all original truck. I have not purchased a new EGR or MAP yet but I swapped most all other sensors, rebuilt TBI, new cap, rotor, wires, plugs, new fuel tank, fuel pump, filter and reset TCU and ECM. So, the only other acronym I can think of is the WTF sensor.