Can't Win

[spareparts]

that's are far as i know, I'm not that familiar with the Ford trucks, I was just going thru basic diagnosis that I would use on any engine. I guess the next thing is to check the harness, see if the injector harness terminates to a plug that goes to the main harness. The injectors fire using a ground pulse from the ECM, so check the input wire to each injector thru the harness. See if you can find a wiring diagram on line and do a pin out resistance check from the ECM to teh injector connection. You may need to get a long jumper wire to extend you reach with the Ohm meter. It does sound like a computer taking a crap on you. Try letting the engine run, then tap on the computer with a screw driver handle and see if it changes the way the engine runs, if it does, that's a sure sign the ECM is bad