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Posted

1991Pontiac Grand Prix SE 3.1 LV6/AT-loaded accessories.

I have a problem that this vehicle will not start. It will crank, with a new battery and I have changed plugs and wires. I get spark on wires, fuel pump sounds like it is working to prime system when key is on and after cranking, get fuel pressure to rail when release/check valve on fuel rail is pressed. Car will run with "starting fluid" sprayed in intake. Please Help!.

Posted

Well if it runs on SF then it's deffinately a fuel problem. Could be a number of reasons for that, could be fuel filter, pump, pressure regulator, injectors/harness. Probably more but it's hard to say.

Posted

the oil sensor can cause a no start, because if the sensor detects no oil pressure at cranking, then it will not allow the car to start.

Posted

You are correct Dan. If the engine has a low oil pressure, the oil pressure sensor will shut down the fuel pump to save the engine. Pretty ingenious. :D

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