Shuts off while driving

1989 BUICK ELECTRA
88,000 MILES • 2.3L • 6 CYL • 2WD • AUTOMATIC
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CARTROUBLEBLUES
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I've had this car for about a month and it hadn't started to give me problems until recently. I would drive to work and as soon as I hit 55 MPH the car would jerk and smooth itself out. I thought nothing of it until on my way back home. The car jerked while I was going 30 MPH and just turned off. All the lights on the dash board came on and I had to direct the car to the nearest mechanic. The thing is, as soon as I park it and turn it back on, it works. Like nothing happened.
At the mechanic they've replaced the crankshaft sensor and I even had them do a fuel system cleaning, but the car still turns off while driving. I've noticed that if I drive it for too long, it starts to shut off. But when I go to the store or any place where I don't go too fast, it drives normal. I've taken back to the mechanic and they don't know what the problem is. They say it could be a bad sensor. But they just font know which one. Not to mention there's no check engine light to warn me.
May 7, 2021 at 6:43 AM
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ASEMASTER6371
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Good morning,

This was a common issue back in the day. The ignition control module was the common failure for this.

https://www.2carpros.com/articles/engine-stalls

Did the shop check the module? You can remove it and take it to a parts store and they can test off the car. It is a free service at the parts store. I would also replace the coil pack as well.

Roy
May 7, 2021 at 7:24 AM
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CARTROUBLEBLUES
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Hi. Thank you for the reply and forgive me for not replying back. As of today the mechanic replaced sensors, wire kits, all spark plugs, and even injectors. It still turns off without warning. And they replaced the ignition control module.
Jun 9, 2021 at 8:41 PM
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ASEMASTER6371
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The only thing I do not see is the coils. They should have been part of the module.

Did they replace the coils with the module?

Roy
Jun 9, 2021 at 9:50 PM
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CARTROUBLEBLUES
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I don't believe so. I'll be sure to ask since the problem hasn't been fixed. If the coils aren't the problem, could there be anything other cause or reason?
Jun 10, 2021 at 7:17 AM
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CARTROUBLEBLUES
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This what they did.
Jun 10, 2021 at 1:55 PM
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ASEMASTER6371
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Who replaced the ignition module and crank sensor? There is no mention of them performing the repair.

Roy
Jun 10, 2021 at 4:30 PM
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CARTROUBLEBLUES
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The crank sensor and ignition control module were replaced at another shop but according to these guys the module wasn't sealed correctly. So they fixed that.
Jun 10, 2021 at 4:35 PM
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ASEMASTER6371
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That may have damaged the new module. I would have them test that module to be sure it is not damaged.

Roy
Jun 11, 2021 at 3:46 AM