Question about 1991 Buick Regal

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1991 Buick Regal will not start

From one moment to the next, the car would not start. Engine turns over fine. There is no injector pulse, there is no spark. Fuel pressure is good. After sitting a couple of hours, it just started again - and ran for 5 minutes, then stopped and would not start, same symptoms.

Is the ignition module responsible for the injector pulse also?

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  • sdleikam Dec 11, 2008

    My father in-law has a 1991 Buick regal. He can not get it started. He has replaced the ecm, ignition module and the crank shaft sensor. The fuel pump has adequate pressure. At first it acts like it wants to start, then it just turns over and does not sound like it is firing. Any suggestions?

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Chech to see if you're gettin a signal from the crankshaft position sensor located behind the crank pulley. If no signal, you have either a bad sensor or a bad crank pulley. There is a reluctor ring on the pulley that separates and goes bad. If you have a good square wave signal from the the crank sensor it's probably going to be the computer. I've replaced a lot of them. They do really wierd things when they start to go. Check all of your grounds first. Also, while the car is running, shake and pull on the wiring harnesses for the computer. I've seen on a few cars where a wire or 2 will go bad and cause and occational short.

Posted on Nov 07, 2008

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