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

73,835

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 of 1 people found this helpful.
2,335

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

73,835

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 of 1 people found this helpful.

Your Answer

Grand Am

Looking for a Used Grand Am in your area?

CarGurus has 36 nationwide Grand Am listings starting at $3,695.

Postal Code:

Pontiac Grand Am Experts

  • #1
    tenspeed
    Reputation
    7,790
  • #2
    John Saffrahn
    Reputation
    1,610
  • #3
    Tom Demyan
    Reputation
    1,520
View All

Related Models For Sale

Used Pontiac Grand Prix
5 Great Deals out of 83 listings starting at $1,800
Used Pontiac Firebird
21 listings starting at $8,900
Used Pontiac GTO
2 listings starting at $13,900
Used Ford Mustang
8 Great Deals out of 1,120 listings starting at $1,250
Used Chevrolet Camaro
807 listings starting at $13,404
Used Chevrolet Impala
130 Great Deals out of 1,053 listings starting at $2,600
Used Chevrolet Malibu
102 Great Deals out of 2,228 listings starting at $2,994
Used Honda Accord
76 Great Deals out of 1,059 listings starting at $1,200
Used Honda Civic
303 Great Deals out of 3,475 listings starting at $995

Used Cars For Sale

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.