I have a 1997 grand prix gtp that runs for 2 sec then shuts down. I can hear the fuel pump still running for 1 - 2 sec after it shuts down . it will start and do the same thing.

10

Asked by Oct 24, 2013 at 10:04 PM about the 1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: Maintenance & Repair

11 Answers

Does the smoke smell chokey? Thinkin' the mix is wrong due to bad data from the block sensor, the intake air temp sensor and the coolant temp sensor...these things play into the resulting air/fuel combination that you'll be trying to ignite....a couple of seconds before spark plugs foul up? Could this be?

63,165

Will it keep running if you put your foot on the accelerator pedal? If so, it's probably a bad IAC (Idle Air Control) valve. HTH. -Jim

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10

no. its like as if i turned the key off. .the only code is p1441.evp canster purge valve leak

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purge valve?...would try a fresh fuel cap first~

63,165

I'd replace the purge valve first. Check your vacuum hoses for damage and leaking as well. Could be either the purge valve is stuck open, sucking raw gasoline into the engine and flooding it. Or you have a vacuum leak that's upsetting the air/ fuel mixture. HTH. -Jim

the purge valve failures I've seen in the past have made it so that the tank is difficult to fill...one guy actually used a funnel because the pump kept shuttin' off~

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the fuel pump relay---there is one for ten bucks~ https://www.google.com/#q=1997+grand+prix+fuel+pump+relay&tbm=shop

the zinger was "won't shut off"....an unhappy relay will do this~

63,165

True, Judge, if the purge valve is stuck shut. If stuck open it'll pull gas into the engine. BUT you made me think of something just now. Perhaps a vacuum is being created in the fuel system because of the purge valve. Try running it a few minutes with the gas cap off. If it starts and runs like that, there we go. Bad purge valve. Thanks Judge! -Jim

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https://www.google.com/#q=1997+grand+prix+purge+valve&tbm=shop ____hey, and not too expensive too, if this will help the situation...but the motor staying running can only be a stuck or sticking relay...there ain't no other thing what might cause this situation~

1 out of 1 people think this is helpful.

....always suspecting the throttle position sensor...you might put an ohm-meter on this to see if any point it reads zero ohms or a mostly infinite ohms...and should be replaced~

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