Questions and Answers

Buick LeSabre Croaks Hot Q. 1994 Buick LeSabre runs fine when cold. But when it reaches operating temperature it cuts off. I have replaced the fuel pump, relay, cooling temperature sensor, oxygen sensor, and the crankshaft position sensor. And when the engine cuts off the car does not have any fuel pressure. Please give me some advice I am down to my last resort. Thanks! Tommy

A. I assume you have a pressure gauge on it when it shuts off. Could be the pump shutting down. Somewhere there is a fuel pump test terminal under the hood. With a fused jumper wire to battery positive, jump to this terminal and see if the pump comes back to life. The oil pressure switch could have a problem as well.