Question about 1994 Pontiac Grand Prix
I have a 1994 Grand Prix . The engine shuts off when going down the road . It seems to happen mostly when all lights are on dash and head lights. computer, starter and battery have all been replaced. Cleaned off all connectors in both fuse boxes under hood. Door locks won't release when turning key off. The radio also comes on by itself when the key is not in ignition. and will shut back off when moving steering wheel there are also radio controls in the steering wheel. I'm thinking it's something electrical.
These engines have a sensor known as the Crankshaft position sensor, they are most of the time the part that causes these problems, it is located on the front of the engine, it gets it's signal from the crank pulley/harmonic balancer, if it goes open when hot the engine dies, when the sensor cools back down the eng will restart.
Posted on Oct 10, 2008
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