Fuel Pressure psi?
05-05-2009, 03:15 PM
#1
1st Gear Member
Thread Starter
Join Date: Mar 2009
Location: missouri
Posts: 125
Fuel Pressure psi?
93 lx 5.0
was told by the dealership that it should be
key on engine off: 40 psi
key on engine on : 32
they had no info for under a load or at higher RPMs?
what you guys say.
or could it actually be my O2s i do get codes 41 and 91 but no check engine light
the car only has 62,000 miles on it and is stock as it can get.
all the parts are original except
cap and rotor
plugs and wires
fuel filtr
air cleaner
ingnition coil
im about ready to just take it in somewhere and let them go over it and replace all the sensors and control parts but dont want to do that
was told by the dealership that it should be
key on engine off: 40 psi
key on engine on : 32
they had no info for under a load or at higher RPMs?
what you guys say.
or could it actually be my O2s i do get codes 41 and 91 but no check engine light
the car only has 62,000 miles on it and is stock as it can get.
all the parts are original except
cap and rotor
plugs and wires
fuel filtr
air cleaner
ingnition coil
im about ready to just take it in somewhere and let them go over it and replace all the sensors and control parts but dont want to do that
05-05-2009, 07:27 PM
#3
3rd Gear Member
Join Date: Feb 2008
Location: Florida
Posts: 836
Fuel pressure at WOT(underload) should be 40 psi, you can sumulate this by disconnecting the vacuum port on the regulator. Fuel pressure at idle should be 32 psi. Best thing to due is hook up a fuel pressure gauge with an extention hose, tape the gauge to the windshield and drive the car. At no time should the pressure fall under 30 psi.
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