1994 Buick Lesabre keeps shutting off.. Service Engine Soon light does not come on and it will restart. Additionally radio stays on unless actual switch is turned off. Sometimes the speedometer waves about right before the car turns off, but not every time. It's not the negative battery cable, but have no other ideas.
Your best bet ,take it to a qualified repair shop that has the proper knowledge an testing equipment .
003 Fuel System Tests Scan Data Tests
003 Engine Peformance Tests Scan Data Tests
SOURCE: URGENT - 1994 Buick LeSabre stalls in mid-ride
I have the same vehicle, and had the same problem. I took it to my mechanic, and after all of the codes were read we replaced the Ignition Control Module, then the Crankshaft Position Sensor.
It runs just fine now.
Best bet would be to have someone hook up the code reader. The car will tell you what it needs(not specifically, but it'll tell you where to look).
Good luck!!!
Kindest Regards,
Ollie
SOURCE: Interior lights won't turn off 1999 BuicK LeSabre.
yes there is a relay switch in engine compartment or under dash
SOURCE: 1994 Buick Lesabre service engine soon light. Can't read code.
I found several shops in my area, Albany, NY that had the older code readers. It worked fine, and cost me $30.00. It showed a bad O2 sensor that I replaced myself. I suggest you go to a reliable shop. Auto Zone/Advance etc.. do not have the right code readers. Joe
SOURCE: rough idle engine shakes
possible IAC (idel air control valve) takes about 30min to change out
SOURCE: 1995 Buick LeSabre - Stalls then restarts while driving
Has the fuel filter been chg. lately. If it has, maybe a fuel pressure test is in order. Fuel pump might be geeting weak and does not show up until it gets warmed up. Fuel pumps are a common problem on this type of cars.
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