89 grand prix 2.8l.when i turn the key it wont turn over and i noticed gas on the ground. come to find out its coming out of the throttle body. seems like all the injectors are pumping fuel at once.

20

Asked by Jan 21, 2014 at 08:24 PM about the 1989 Pontiac Grand Prix LE

Question type: Maintenance & Repair

5 Answers

21,495

a vacuum controlled fuel pressure regulator has a vacuum hose and a diaphragm is inside to regulate. if diaphragm splits it sends fuel down the hose to intake. excessive fuel will block piston, you cannot compress a liquid

1 of 1 people found this helpful.
71,025

Once you get the gas out of the cylinders you'll need to replace the spark plugs. They're gas fouled now. HTH. -Jim

1 of 1 people found this helpful.
20

so the regulator is probably bad?

1 of 1 people found this helpful.
20

the amount of gas that came out was unbelievable. i opened the throttle body and it poored out

1 of 1 people found this helpful.
71,025

Either the regulator is bad or you've got a fuel injector(s) that's stuck open and allowing gas to just pour out when the fuel pump comes on. Also pull the vacuum line for the EVAP system at the intake. If the purge valve is stuck open that'll pull gas up into the intake as well. HTH. -Jim

Your Answer

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,641 nationwide Grand Prix listings starting at $1,449.

ZIP:

Pontiac Grand Prix Experts

  • #1
    Js08016
    Reputation
    4,420
  • #2
    Tom Demyan
    Reputation
    3,060
  • #3
    munron
    Reputation
    2,470
View All

Related Models For Sale

Used Pontiac Bonneville
489 listings starting at $3,699
Used Pontiac Grand Am
1,087 listings starting at $994
Used Ford Mustang
537 Great Deals out of 35,434 listings starting at $1,200
Used Chevrolet Monte Carlo
4 Great Deals out of 1,290 listings starting at $1,488
Used Chevrolet Camaro
411 Great Deals out of 30,554 listings starting at $1,450
Used Pontiac Firebird
6 Great Deals out of 769 listings starting at $2,500

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
12 Great Deals out of 399 listings starting at $1,900
2007 Pontiac Grand Prix For Sale
12 Great Deals out of 381 listings starting at $1,449
2006 Pontiac Grand Prix For Sale
419 listings starting at $3,995
2005 Pontiac Grand Prix For Sale
5 Great Deals out of 342 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.