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Originally Posted by dera
I have a 91 Lumina (sedan, not the truck). Suddenly, it would not stay turned over. Took it to an auto repair location, that diagnosed a burned out throttle control. OK. Fixed that.
While they were running it for around 1/2 hour, it did it again. Burned out the throttle control. Running diagnostics after replacing it again resulted in a code stating the ECM was bad.
OK. Replaced the ECM. Still won't work. Replaced it again. No go. He took it to a dealer, who diagnosed a bad ECM (That had been replaced twice). Oh, the prom was also replaced each time. Auto place declines to have dealership fix it.
So, auto place tells me they can't do anything more. They don't know what to do. Now, it is over at the dealership. I suspect an electrical issue, but this is really perplexing. The auto repair place did run the electrical, and couldn't find a fault. But still, why would it show a bad ECM after replacement?
Any ideas???
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Update: The ECM was bad, due to a shorting fuel injector. Replaced the ECM, replaced the injectors. Idles fine now, but anytime it goes over 20 mph, it sputters, misfires, and dies... :-(