Engine Flooding

Asked by Feb 03, 2017 at 07:11 AM about the 2003 Pontiac Grand Am SE

Question type: Maintenance & Repair

My grand am engine has started flooding with gas if it runs more than 30 minutes. Sometimes it turns completely off. I have to squirt gas out from a small pipe like line under the hood. I've had my tank clean, new air filter, and Im not sure what else could need to be replaced.

3 Answers

87,085

The only way the engine could be flooding is if the fuel injectors are leaking. That pipe you are talking about I believe is the fuel rail. Gas would squirt out of it pressing on that access valve. That valve is where you would check the fuel pressure. So you should check or have it checked by doing a fuel bleed down test. Hooking up a fuel pressure gauge to the Schrader Valve it's called, turn the key on, let it build up fuel pressure, turn the key off. Watch the gauge, fuel pressure should not drop more than 5 lbs. in a short period of time.

1 people found this helpful.
7,475

so after you purge gas from the schrader valve it will start ? Sounds like a bad fuel pressure regulator , where ever that may be .

87,085

There is suppose to be pressure at the Schrader valve. Like 30 to 44 lbs. of pressure. A fuel regulator does not cause flooding.

1 people found this helpful.

Your Answer:

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 20 nationwide Grand Am listings and the tools to find you a great deal.

Postal Code:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    8,130
  • #2
    Tom Demyan
    Reputation
    1,680
  • #3
    John Saffrahn
    Reputation
    1,650
View All

Related Models For Sale

Used Pontiac Firebird
27 listings starting at $15,900
Used Pontiac GTO
5 listings
Used Chevrolet Impala
25 Great Deals out of 874 listings starting at $2,894
Used Chevrolet Camaro
11 Great Deals out of 924 listings starting at $11,500
Used Ford Mustang
36 Great Deals out of 1,245 listings starting at $4,685
Used Chevrolet Malibu
38 Great Deals out of 1,801 listings starting at $1,995
Used Honda Civic
112 Great Deals out of 4,691 listings starting at $1,655
Used Chevrolet Corvette
7 Great Deals out of 526 listings starting at $9,950

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.