Question about 1992 Pontiac Grand Prix

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Car cranks but doesn't start and no fuel pressure

My car cranks but doesn't start i changed the starter and fuel filter, it now cranks and acts like its going to start but dies after a second or two. I checked the fuel pressure and there is no pressure at all. But at times there seems to be good pressure but now its as if it has lost all pressure, fuel pump works. What should I do to fix this problem?

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  • theozzman86 Oct 16, 2008

    even if i can hear the pump running?



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The fuel pump is probably bad, bad pumps can produce some pressure at times but not enough to run the car.

Posted on Oct 16, 2008

  • hansandfranz Oct 18, 2008

    pumps can be noisy and not produce much pressure. but if your car starts what is the pressure before starting. if the pressure drops after it is started the oil pressure switch could also be a culprit. the fuel pump gets its power throught this switch after the engine is running



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Did you check the fuel pressure at the fuel rail? with key in the on position to activate the pump? If you did and there was no pressure I would first check for the obvious, gas in the tank, leaking fuel from a line, check for flow before the fuel filter, located at the rear of the vehicle near the gas tank. take the fuel pressure line off put it in a catch can and have somebody turn the key to the on position to activate the pump, if it flows chances are the filter is plugged. Also pay attention to the sound of the pump if it is very loud there is a good chance the pump is failing and needs to be replaced. It could also explain why sometimes it dies. The pump is going out of range. Hope this helps

Oct 16, 2008 | 1992 Pontiac Grand Prix

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