1990 Pontiac Sunbird 2.0 died on the highway

Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 1990 PONTIAC SUNBIRD
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 140,000 MILES
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.
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Tuesday, October 19th, 2010 AT 11:36 PM

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Tiny
2CARPROS-ARCHIVES
  • MEMBER
Sounds like you have attacked the problem pretty well. Check the fuses. Do a "pin" check for power and ground to the ECM. When you replaced the ECM, did you use a new prom? If not, you could have a faulty prom. Check fuel pressure and using a Noid light check the pulse at the injectors. For your information, the injectors will have 12-volts and the computer momentarily grounds them to open the injector.
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Tuesday, October 19th, 2010 AT 11:38 PM

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