1990 Pontiac Sunbird 2.0 died on the highway

My car last week died on the highway and I got it towed home. The first thing I did was get codes from the computer. I got a code 22 which is the TPS. I changed the TPS. The car would still not start. I got a code 34 which is the MAP sensor .I changed that also. Again it would not start. I have checked the plugs, leads, rotor, cap, and coil, all of which are fine. I checked the timing belt and marks several times insuring that the rotor was pointing to the number one cylinder. I have checked for compression, again it is good. I have checked the wiring to insure the sensors are getting the voltage required. I also replaced the ECM which again made no difference .I am getting fuel from the injector but I think it is too much and is causing the engine to flood every time. I replaced the coolant sensor, as I know this can affect fuel delivery when cold. Still it will not start. I disconnected the injector and the engine ran for a brief moment on the fuel in the throttle body. I measured the voltage going to the injector, which was 12 volts. I measured the resistance in the injector, which is 1.7 ohms. I have checked and doubled checked everything and I am truly at my wits end. If you could give me any information on this to point me in the right direction I would be very grateful.