1990 pontiac sunbird won't start

  • Thread starter Thread starter leroyZ71
  • Start date Start date
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leroyZ71

I have tried everything to my knowledge. I have changed the fuel pump,ECM, fuel inector. I get fuel up to the injector but the injector won't open and spray out fuel. I have tested the injector and it was good, I have checked fuses, I have checked the wiring from the ECM to the injector and thats all good. I'm lost what am I missing? Help!:confused:
 
injector needs to be told to open. it recieves a pulse from the ecm to open. a noid light is used to check to see if the injector is recieving the pulse. not everybody has a noid light.
 
What would be the problem be if the injector is not recieving the pulse? I replaced the ECM already.
 
was it a new or used ecm?does it have e-prom? i think on a 90 it still has a distributor, and i'm not sure but i think the ecm needs to know the right time to spray fuel, and without it getting the right input from the dist or crank sensor, i don't think anything will happen.i am definately not a mechanic maybe i shouldn't be replying,but hey i'll try to help
 
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