Mechanics

F150 FUEL PRESSURE

1997 Ford F-150

Engine Performance problem
1997 Ford F150 V8 Four Wheel Drive Automatic 147000 miles

Can anyone tell what the fuel pressure should be on my pickup.

My Haynes repair manual says the OK pressure for 5.4L in on position should be 55psi and running is 55psi.

I called autozone and they said it should be 30 to 45psi. I have tried researching on line to determine what the correct pressure should be. No luck.
Avatar
Sgarbel
September 10, 2010.




Here are the official specs

FUEL PRESSURE
Key On, Engine Off (KOEO) 30-45 psi
Key On, Engine Running (KOER) 27-42 psi

This is tested at the service port without blocking the return line.

Wrenchtech
Sep 10, 2010.


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