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91 JEEP YJ7 4.0 NO FUEL PRESSURE IN FUEL RAILING


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TEXPARTYBOY
New User

Jan 30, 2016, 2:56 PM

Post #1 of 3 (763 views)
91 JEEP YJ7 4.0 NO FUEL PRESSURE IN FUEL RAILING Sign In

WE REPLACE THE FUEL PUMP TWICE FIRST WAS A REMANUFACTURED PUMP AND THERE WASNT STILL NO PRESSURE IN FUEL RAILING SO HE PURCHASED A NEW FUEL PUMP AND THE SAME PROLEM


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 30, 2016, 3:09 PM

Post #2 of 3 (760 views)
Re: 91 JEEP YJ7 4.0 NO FUEL PRESSURE IN FUEL RAILING Sign In

! - I think it looks like this..........



That plug to the left in the pic should have power and ground to it or you are barking up the wrong tree.
Just wondering what you meant by a rebuilt pump meaning the motor of it? I never heard of such a thing,


T



kev2
Veteran
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Jan 30, 2016, 3:43 PM

Post #3 of 3 (754 views)
Re: 91 JEEP YJ7 4.0 NO FUEL PRESSURE IN FUEL RAILING Sign In

is there 12v at pump with key on?
DID YOU CK FUEL PUMP FUSE AND RELAY?
FYI - you must check voltage when key moved to on - the PCM will only power pump @2 SECONDS IF ENG DOES NOT START...






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