Question about 1993 Buick LeSabre

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Motor cuts off while riding down the road - then hard to start

While traveling down the road, the car motor randomly cuts off. After idling to a stop, it usually is difficult to crank and sometimes it will not crank until 30 to 40 minutes later but ultimately cranks. I had two different Buick dealerships try to diagnose it but neither one's equipment detects any problems. I even had it towed to a dealer one time when it quit and would not crank. It did not crank while I was at the dealer, but by the time he pushed it into the repair bay, it cranked on the first try. He said since it was starting, his equipment did not detect a problem. Sometimes it will not crank when first getting into the car, but this is after I have driven it for awhile. In other words it always seems to crank when it is cold and not warmed up. The dealers think it may be either the ECM or the ignition module but they cost $244 and $500 respectively and I do not want to do either because they are not sure this is the problem.

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  • myarbrough Feb 17, 2009

    Thanks for the suggestion. I might give this a try.

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I would replace the crankshaft position sensor, I had this same issue on my 91 Rivera (same engine and electronics) and after replacing all the parts u mentioned that is what finally fixed it, and I am a dealer technician, was a very frustrating problem, as far as the no crank goes I also had this problem, it turned out that tightening the starter motor battery cable connection and solenoid lead fixed that, hope my fix works for you.

Posted on Feb 16, 2009

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