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Thread: Symptoms of fuel pump O-ring problem? Reply to Thread
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Topic Review (Newest First)
10-15-2013 01:34 PM
1 Lucky Texan he did say 'continuous' .
10-15-2013 12:46 PM
wilsonhp A high pitched squeal from the tank area is the sound of a normal pump running. On any car, turn the key to the first position (before starting) and listen. the pump will run for a few seconds to pressurize the fuel rail. it will sound like this-a high pitched squeal. once the car is running, the sound is overwhelmed by the running engine sounds and you never hear it.

the squeal does NOT mean it is bad.
10-15-2013 10:19 AM
Dodik generally high pitched sound from tank would be fuel pump going bad from my expirience
10-15-2013 12:13 AM
1 Lucky Texan I suppose a problem with the exhaust could make a high-pitched sound. Is it like a whistle, a squeal or ????

maybe cardoc or others here could help more if you could post a link to a recording of the sound.

As for the cap, If you were reluctant to pull the pump to check, I'd bet a fuel pressure test would be helpful.
10-14-2013 04:49 PM
subaruman49 Wonder if there is a way to prevent the cap from splitting ?

Great info!!! Thanks for sharing
10-14-2013 04:48 PM
zaphar
Quote:
Originally Posted by 1 Lucky Texan View Post
I haven't read of a sound being a symptom but, I suppose it's possible.

Any pressure or vacuum when you remove the gas cap? I suppose a noise could also be made with the evap system. Any trouble codes stored?
I hooked up a OBDII reader recently, but for a different problem (P0037); haven't tried the gas cap thing yet.
10-14-2013 03:56 PM
1 Lucky Texan
Quote:
Originally Posted by zaphar View Post
If there's a problem with the in tank cap or o-ring, will it cause a continuous high-pitched sound to emanate from the fuel tank area when the car is on? My car ('04 Obk EJ259) still starts up, but the sound from the gas tank area makes me suspect a problem like this.
I haven't read of a sound being a symptom but, I suppose it's possible.

Any pressure or vacuum when you remove the gas cap? I suppose a noise could also be made with the evap system. Any trouble codes stored?
10-14-2013 03:52 PM
zaphar If there's a problem with the in tank cap or o-ring, will it cause a continuous high-pitched sound to emanate from the fuel tank area when the car is on? My car ('04 Obk EJ259) still starts up, but the sound from the gas tank area makes me suspect a problem like this.
10-07-2013 08:45 AM
1 Lucky Texan more details on the car and original symptoms please.

In the first few seconds of turning the key from OFF to ON (but not start), do you hear the pump come on for 2-3 seconds? If not, the problem may be electrical.
10-07-2013 02:01 AM
Manus007 Hi I have an outback 2.5, I replaced the fuel filter in the tank and since then the car will not start. It almost kicks over when I first turn the key then just winds over and over. There is no pressure in the tank as when I open the fuel cap there is no noise or anything, I did ave trouble getting the metal cap on and used the old seal. What do you think and advise..
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