1992 Buick Lesabre keeps dying randomly

Skye Camden

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1992 Buick Lesabre
Since we've had the car (We got it from a family friend who barely drove it), the car has been idling high, but it always goes back to normal after driving it for a bit. However, about a week ago, we went out to drive it and every couple of minutes it would just completely shut off. It's shut off in the past, but after restarting it, it was fine. Last time, however, it must have shut off over ten times.
 

imidazol97

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You are going to have to have someone diagnose what's causing the problem.
The car needs spark, fuel, and air in order to operate.
We need to know which of those is the problem.



When it shuts off, does it immediately restart? Or is it not starting for a few minutes up to 30 minutes?
If so, you might have someone use a spark tester, or an old spark plug connected to one of the spark plug
wires to see if there is spark during that time. The crankshaft position sensors gave trouble on 3800s after some age. Yours has age and not a lot of miles or run time. But age may have reduced the magnetic field strength and the crankshaft position sensor is failing to trigger the spark module.

Does it shut off like it's being slowly shut down like it's not getting fuel from a stopped up bag filter on the fuel pump from gunk in the tank? or a fuel pump that's slowly dying? Or does it shut off quickly like the key has been turned off?

If it will shut off while idling, that would be great for a quality mechanic to put it in his shop and let it idle until it dies. Sometimes these problems fix themselves before the car can get to the mechanic shop.

The computer code system on these cars is not as helpful as the ones from 1995 or 1996 on.

Has the check engine light come on at all when this dying happens?

The fast idle is not something I can see unless you have a bad piece of rubber vacuum hose
that has cracked with age or heat and letting air into the intake. Could be a temperature sensor that
isn't giving the right reading so the engine is running faster and giving a richer mixture if it thinks the engine is colder than it is, for instance.

Good luck.
 
Last edited:

Frampton

Active member
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2003 buick lesabre custom
Since we've had the car (We got it from a family friend who barely drove it), the car has been idling high, but it always goes back to normal after driving it for a bit. However, about a week ago, we went out to drive it and every couple of minutes it would just completely shut off. It's shut off in the past, but after restarting it, it was fine. Last time, however, it must have shut off over ten times.
Could be tps, of course it could be many things. Do u small gas? If so, fuel pressure regulators are known for that...
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Thunderhawk09

Active member
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2005 Buick LeSabre Custom
my number one would be the Ignition Control Module under coils just had this happen last week to a customers car and since we had a spare laying around that had been pulled from her car when the engine swap was performed she runs a mail route and it had shut off 6 times that day but mostly would start right back up We swapped them out and all is good again
 

Frampton

Active member
492
80
28
2003 buick lesabre custom
my number one would be the Ignition Control Module under coils just had this happen last week to a customers car and since we had a spare laying around that had been pulled from her car when the engine swap was performed she runs a mail route and it had shut off 6 times that day but mostly would start right back up We swapped them out and all is good again
Yup. A good possibility but expensive just to guess. Probably should get it checked out for sure.
 
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