im new to the forum so hope im in the right place. i have 1992 gmc 1/2 ton pickup 2wd 4.3liter.im havin issues with it not starting first i had to spray starting fluid in it and it would run great no stalling missing or anything,then it would ramdomly shut off and would not start so i replaced the fuel filter no luck then replaced the fuel pump and sending unit and it started right up so i figured problem fixed so i drove it for 30 mins got it home shut it off wont start again so i sprayed starting fluid in it still would'nt start.so went and replaced the fuel injectors still no start so i replaced the fuel pump relay still wouldnt start so i went and bought a ingtion control module it started right up drove it for 3 days then it started acting up again.now when i crank it the fuel injectors wont work so i checked to see if i was getting fuel pressure and its getting fuel to the throttle body..
i might want to mention i went and got a computer for it from the scrap yard and it wouldnt start so i pluged the old one back in and it started right up. then it wouldnt start back up agian after i shut it off.. this truck has me stumped and any help would be nice
update! i narrowed it down i unplugged the MAP sensor from the throttle body and it started right up had a rough idle then check enginge light came on and ran fine after.so my question now is it the map sensor or the egr solinoid thats the only thing i found on the emmision system.
i might want to mention i went and got a computer for it from the scrap yard and it wouldnt start so i pluged the old one back in and it started right up. then it wouldnt start back up agian after i shut it off.. this truck has me stumped and any help would be nice
update! i narrowed it down i unplugged the MAP sensor from the throttle body and it started right up had a rough idle then check enginge light came on and ran fine after.so my question now is it the map sensor or the egr solinoid thats the only thing i found on the emmision system.
Last edited:
