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Originally Posted by chefmaq
 i have a 92 chevy lumina 3.1 v6 auto trans. 199,306mi. the car starts and runs rough it will let me drive about 1 mile and then it starts to stall at every stop sometimes if i ride the brake and gas i can keep it runnig.but it still sputters chokes and backfires. i have replaced the egr valve map sensor ,engine coolent temp sensor vacum harness and hoses. i just tried a new iac valve and it still did the same.kno i am begging for the right solution.please
ty mike |
Bad fuel injector(s) they were common! Big time
A high resistance in the injector will cause the rough running and stalling.
being that 3 of the injectors run from one driver and the other 3 run from the other driver.
what happens is the high resistance in one or more injectors will feed back to the computer and cause the other injectors not to fire properly causing this condition.
The unfortunate thing is that you have to remove the upper intake plenumn to access the injector to measure the resistance.
remove all of the injector connectors and measure the resistance of each injector.
anything under 12 ohms, the injector is bad.