I think your car has a standard type ignition coil. You did not say that you have checked this. Many people will tell you that the coil never goes bad, but I have replaced three in different cars in the last 2 years and in each case fixed my problem. If you have a test lamp or meter, check that you have voltage coming to the coil, and if so, swap in a known good coil to test with. Problem solved?
I drive an hour each way to work. My 1989 Buick LeSabre Limited drives beautifully for about 1/2 an...
(More)
I drive an hour each way to work. My 1989 Buick LeSabre Limited drives beautifully for about 1/2 an hour. Once it heats up, the "service engine" light comes on the "temp" idiot light flashes and the motor rolls and tries to quit. However, the car gives no indication of a temperature problem (no smoking, smell, expanding hoses, leakes, nothing). I recently replaced the plugs & wires and the cooling sensor. This morning, the weather was much cooler and the car ran like a dream. A friend of mine put a computer on the car and it gave codes indicating an oxygen sensor needed to be replaced and it had a mis-fire. It gave no codes indicating a temporater problem. What do I do now?