1997 Buick Lesabre just stops

1997 BUICK LESABRE
86,000 MILES • 6 CYL • FWD • AUTOMATIC
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BG993
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when driving the car just dies. you pull over put in park turn off, some times it will start right up, sometimes it will just crank and acts like no fire. wait a few minutes and will start up. it only happens after it's warm up. some times you can only drive a mile and it does it again..trouble code says map sensor. but I've checked it, 5 volts in and varies when running, with nothing when with key on. i did trade it with a known good one just to make sure.
tonite a new twist, driving on highway and it died, did not do anything kept foot steady on gas and coasted about 15 seconds and it fired back up on it's own.
Feb 19, 2008 at 10:13 PM
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BMRFIXIT
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if no trouble code available
check spark and check for fuel pressure
I would check/replace crankshaft sensor as a 1st step
Feb 20, 2008 at 5:02 PM