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Fuel Pressure?

steveissteven

Active Member
Joined
December 31, 2000
Messages
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City, State
LAS VEGAS, NEVADA
Year, Model & Trim Level
'93 SPORT
I have a '93 Explorer Sport 4.0 with Auto Trans

Anyone know what the proper fuel pressure should be at idle?

Mine is reading 31psi at idle with Pressure Regulator Vacuum Hose attached.

Is this right?

What should it be with Regulator Vacuum Hose removed?
 






My 91 FSM gives a 30-45psi range with engine running, and 35-45 Key On Engine Off. Also gave me a 35-45 psi at idle with vac line plugged.

Do this with the engine at idle also try it while you accelerate the engine see what the pressure does- should be within 3-5psi of idle.

good luck.
 






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