Q: What else should we be checking? on 1990 Mitsubishi Galant

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The engine was dying at stops then the car would no longer start. It now has new plugs, wires, computer, fuel filter, fuel pump, and fuel pump relay. It still will not start. Someone suggested that it could be an electrical problem. What else should we check for? Before we replaced the computer, when it was still running, I noticed a build up of carbon in the tail pipe. I was assuming that because of the bad computer, the car was getting too much fuel. Don't know where to go from here. Have had it in a couple of shops and they can't seem to diagnose it correctly either. I would scrap it if I didn't have so much money in it, plus it has fewer than 90,000 miles on it. Thanks!
(2) Answers
A proper diagnosis by a reputable service shop is your best bet. Throwing parts at a car trying to resolve a no start issue is an expensive way to try and fix it.
I kinda had the same problem. My 2001 Mitsubishi Galant would run for a few minutes and shut off, I had to wait for a few minutes and try to restart. It would crank, but not start. Turned out to be the crank sensor. Maybe this is your problem also? Hope this helps.
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