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Engine Control Module (ECM) can fail on Buick LeSabre

Problem Description and Possible Solution

The Engine Control Module (ECM) can fail causing stalling, and engine and transmission drivability concerns.

Problem Data
RepairPal Verified
Average mileage: 149,352 (55,000–269,229)
10 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1997, 1998, 1999, 2000
31 people reported this problem
Viewing 1 - 10 of 10 comments
replaced fuel pump, regulator, ignition modules, TPS, MAP,Plugs and wires,temp sensor, IAC. Car has a miss 90% of he time. acceleration power is in busts, but the engine smooths out, Some times the chime freaks out for no aperant reason while driving. Some times when accelerating from a stop right around 50 mph it acts like you let let off the throttle, it dont die but wont go. you let off the throttle and back on, its fine. changing ECM next.
car just turns over but dont seem to be firing
Driving down the road and lost all power,steering wheel barely moved but radio stayed on,got it towed. Replaced fuel pump and relays,but it still isn't getting power or fuel pressure like when you turn the key it tries to turn over but it doesn't and idk what it could be. I've been told computer,fuse length or ignition switch because of the chip in key.any suggestions are greatly appreciated
Had to be towed again to have this module replaced for the THIRD time on Sept. 10 Car just quits in the
middle of the street or wherever. Very dangerous! Module is waranteed for a year...only last 5 months or less.
The problem isn't repaired. I found out from a repair bill in 1/10/12 that I possible problems with Engine Module Control (EMC). But I never had it repaired. But now I am having problems with engine going off and back on while driving it.

I have to warm up my engine before my transmission will run normally. It only takes a minute. That could be the problem with my engine.
Car won't turn over. Replaced the battery & everything lites up. But nothing from the engine.
car studders between 30 and 50 miles an hour
Bad engine performance . Obd test . Car not fixed yet .
Fuel mileage was down, transmission was acting weird and I didn't know what was going on until the belt tensioner went bad and required the battery being disconnected for awhile. Everything improved after the computer was reset, but within 2 weeks, it needs reset again to get things back in order, so I'm assuming the ECM needs replaced.
A sudden crank but no start issue led me into a misdiagnosis nightmare! I replaced just about everything associated with this problem.
Nothing changed. Many dollars later, I found pcm at a junkyard for $20.
Solved the problem.