Check the condition and operation of the idle control valve.
SOURCE: I have a 2000 buick lesabre. The fix engine soon
It NEVER was the camshaft sensor! Unless, you've removed the engine lately, which I doubt.
RUN to Advance Auto Parts and buy a can of "SeaFoam" and add to your gas tank per instructions...drive at least 100 miles and the problem should go away...IF it doesn't you'll have to replace the O2 sensors in the exhaust system...Any good mechanic should be able to do this for much less $$ than the dealership DO NOT go to the dealer for repairs!
Good Luck
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: 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.
SOURCE: 1990 Buick Lesabre keeps stalling
Check ecm for part number 1228253. If it has this number in it replace it with a 16198264. Gm had trouble with that ecm for a cutting off problem. Mine would stall driving down the road and when I would put it neutral it would start back up and not have any trouble for the rest of the day. You must set the tps with a volt meter or scan tool.
SOURCE: 2000 buick lesabre- was driving and engine stalled
I had a similar situation and after some research, I discovered it was doing what many referred to as "Phantom Stalling" It would only happen once in a while and when I wanted the mechanic to see it, it never happened for him.
Keep an eye every so often on your RPM gauge (beside the speedometer) and see if it cuts out completely and does not move when you speed up (shows 0 even though your still in in drive and moving). Mine would do that and after a few minutes the car would stall and I would have a hard time starting it back up.
What I found out was that my "Crankshaft sensor" had gone bad. I picked up a new one at AutoZone and had the mechanic replace it.
My car has not stalled since Ive had the sensor replaced and I found that when I was ideling, the idle was a lot smoother than befor.
Hope this helps you.
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