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Old 12-29-2007, 11:59 AM   #1 (permalink)
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Unhappy fuel Pump problem

1997 legacy outback

Symptoms:
Engine turns, spark present, No signs of combsustion at the exhaust pipe. I listen for the sound of the fuel pump at the fuel tank filler and hear nothing. Book says check the fuel pump and main relay, but I can't find them .

Are Relays behind the fuse box?
If so how do you remove the fuse box?
If not where are the realys?

Thanks for listening?
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Old 12-29-2007, 02:47 PM   #2 (permalink)
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People always go for the easiest yet wrong answer.

You have a crank postion sensor and a cam position sesnor. The cam controls fuel injection timing. The crank controls spark. You need to get a mutli meter (analog) with an AC input and test the cam sensor while the engine is cranking. If there is no heartbeat, then thats why you have no fuel. Get yourself a haynes manual as it will explain the test. Fuel pumps do go bad, but thats the last thing that should be suspected, as they dont go bad often.

Another possability is a bad engine temp sesnor. Those three sensors can keep the car from starting if one is bad. They are the most common reason for no start on a computer controled car.

You can access the fuel pump from the plate in the floor of the car opposit the gas fill side (i think its that side). You should be able to feel it running when you turn the car on, as it is a constant on system (I do beleive).

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Old 12-29-2007, 03:47 PM   #3 (permalink)
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^^Well listening for the fuel pump building pressure when the key is turned on (but not start) should be one of the first things to check like he stated. Crank sensors and such mean nothing until the engine is cranking, but if you hear no fuel pump...

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