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testing fuel pressure [Archive] - StangBangerz Forums
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blk93notch
09-16-2009, 07:17 PM
i was wondering what the best way to test the fuel pressure regulator. its a 90 2.3 if that helps.
RACEME
09-16-2009, 08:46 PM
you can get a pressure tester at autozone tool rental. You can also just stick something in the schrader valve on the fuel rail. If a bunch of fuel sprays out then it is probably ok.
blk93notch
09-16-2009, 09:27 PM
well i got a tester. with the key on theres nothing...then when it starts and runs it creeps up to around 30-35. im getting horrible fuel mileage with the 4 cyl
RACEME
09-17-2009, 07:52 AM
well i got a tester. with the key on theres nothing...then when it starts and runs it creeps up to around 30-35. im getting horrible fuel mileage with the 4 cyl

If you hook up the tester then turn the key on, you fuel pump is supposed to cycle. If you don't get any pressure then there is a problem. Horrible fuel milage could be a number of things. Your fuel pressure regulator could have failed and it is pouring raw fuel thru the motor. Your O2 sensor could be bad also causing a rich situation. Are your spark plugs really really black?