My 94 LeSabre has been doing this for about 2 years. Lots of research. Just changed the Crankshaft Position Sensor on 5/10/08 and no problems.
Mine gets ~28 mpg mostly highway driving
bad compression
About 19 mpg in the city and about 28 mpg on the highway.
17 city 26 highway
The 200 Lesabre gets an estimated 19 mpg in the city. The vehicle gets 30 mpg on the highway.
19 city 30 highway.
If you are driving when this happens, try to locate the loose connection around the rear of head lamp. If it happens when you arn't in the vehicle when it blinks. Run don't walk to the nearest dealer for a trade in.
The 1998 Buick Lesabre equipped with 3800 Series II and 4-speed Hydramatic has an EPA estimated highway fuel economy of 27-miles per gallon. Its city rating is 17. The exact economy of the Lesabre will depend on driving habits, maintenance, fuel type, tires and other factors.
Area where your left foot rests while you are driving
One of the main causes for a 1998 Buick LeSabre to die while driving is a problem with the computer. The computer might tell the fuel pump to shut off and stop sending fuel to the motor.
Your 2001 LeSabre is rated at 20MPG City/29MPG Highway. I've found this rating to be fairly accurate. I average 20-22MPG when I'm not using the A/C and have measured highway mileage at just a shade under 30MPG. Pretty good for a big car that has a little pep.
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