Really off topic

[sexymspgurl]

Hey guys,

I like to consider my mechanical knowledge to be great, but I am currently at work and we have a car in the shop that is blowing my mind. I have a an Grand Prix that when the ignition is off is dumping fuel into the intake. I have checked, fuel pressure regulator, IAC, replaced the computer, checks grounds, checked injectors, checked cam and crank sensors, looked at TSB's on ShopKey, etc. I cannot figure out what's wrong with this vehicle. If anyone has any suggestions please post away.

Thanks guys and or gals.

 

[Scott]

Dumping fuel into the intake? What year is the car?

 

[sexymspgurl]

1989 Pontiac Grand Prix LE

 

[DH Motorsports]

relay is stuck open, keeping power to the pump when the car is off?

 

[sexymspgurl]

Just checked that and the relay checks out fine. Still don't have a clue.

 

[Killer]

1989 Pontiac Grand Prix LE

I would just set it on fire.(naughty)

 

[JOS3]

i concur

 

[JDM-P5]

All in favor say "I".
-I

 

[girth]

Does it have the 3.8L V6? If so, let me know if you ever figure it out because I have the same problem with the GM 3.8L in my 1995 Olds. Replaced fuel pressure regular, fuel pump, and fuel pump relay but no dice. I cannot figure it out.

 

[sexymspgurl]

Yep it is in fact the 3.8 V6. I have also replaced those components and still nothing as well. I am completely lost as to what to do next.
Thanks for all your help guys.

PS. I would love to blow the car up too.

 

[kcbhiw]

I bet it's a fuel injector that is stuck open. The injectors on many older GM cars are notorious for sticking.

 

[sexymspgurl]

I hate to piss on anyone's fire, but I tried that too. First I did a motorvac on the car, and I wasn't happy that it had worked so I replaced the whole fuel rail as well as injectors.