SOURCE: 2000 buick lesabre stall after starting or after running for 30 minutes
I have a 1996 Lesabre. I had a similar problem that slowly got worse. I brought it to two different mechanics that did diagnostic checks and could only "suggest" what to replace to fix the problem. Their problem was that it wouldnt stall out while they had the mv. After replacing a bunch of sensors and the fuel pump/ filter, I solved the problem by replacing the Crank Sensor. Its located behind the lower crank pulley on the 3.8 lt motor. Hope this helps!
SOURCE: Car won't start? 1992 Buick LaSabre
three core plug hahahah it has 3 coils crank sensor is located at the crank pulley it sits inside and creates a magnetic field and produces a low ac voltage 5 ac volts or less module then converts it to a squar wave to fire injectors and coils
SOURCE: 94 buick lasabre runs shuts off then will start again
take the car into to a repair shop to diag code for sartersI know I hate walking
SOURCE: My 2000 Buick lesabre cuts off while driving
Your fuel pump might be going bad. The reason why it cuts off is the fuel pump is pumping just enough to run it for a x amount of time that's why it shuts off but while it's off the pump is pumping fuel into the lines. If it's not the fuel pump then it might be your injectors.
SOURCE: car shuts off every time you let off the gas.
The first thing I would check is the idle air control motor located by the throttle valve. Sometimes they can become caked up with carbon and cleaning them out with carb cleaner or replacing them will fix the problem.
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