No fuel pressure???

Macklin96 · 07-22-2008, 07:29 PM

Well today i go take a ride in my 94 2.5l yj, runs fine, get home shut it off then go to start it a minute later to move it and it just turns over and over. i check the schrader valve and no pressure at all not even a dribble. switched relays and the fuse and still nothing. The fuel pump is only a month old so hoping that is not it. I believe i was told the ground is near the parking brake assembly but i can not find it can someone describe to me better where to find it and what it looks like?

Macklin96 · 07-23-2008, 03:27 PM

well i checked voltage to my fuel pump and it is zero so now i am stumped. relays and fuses are good what else controls the fuel pump? getting spark because if you spray gas through tb it starts but then dies

NewhampshireYJ · 07-23-2008, 05:23 PM

I had a problem like this with my jeep. I did everything changed fuel pump,relays,etc. I checked the power and nothing. I decided to look over the wires i looked behind the driverside rear wheel. Theres 3 of them in black loom. I think like yellow,green,black or something. They were going over the frame and hitting the body. I guess the plastic over the wire got rubbed away and the wires corroded. Fixed it and i was all good.

Macklin96 · 07-23-2008, 05:27 PM

i traced the wires last night and they all look fine. I have a body lift so it was pretty easy

1995_4.5L Jeep · 07-23-2008, 05:46 PM

I had an issue like this. I found a wire lose under the fuse panel that was connected to the fuel pump relay. I believe it was a red and green wire.

NewhampshireYJ · 07-23-2008, 05:47 PM

Test your fuel pump relay in your horns relay place. There both the same so you can test it out.

Alfons · 07-23-2008, 06:44 PM

Do you have a wiring diagram for your jeep? If you do, I'd suggest using a multi-meter to see where you have power and where you don't in the fuel pump circuit.

You mentioned that the fuses and relays for that circuit are good, is there power going through them? Have you tested both the hi & lo amp sides of the relay?

Macklin96 · 07-23-2008, 09:30 PM

i tested the relay by switching them in the horns place. all four relays blew the horn. I guess ill have to bust out the multimeter

07-23-2008, 05:46 PM	#5
1995_4.5L Jeep Registered User Join Date: Dec 2007 Location: Colorado Springs Posts: 238 Profile Gallery Classifieds My Jeeps	I had an issue like this. I found a wire lose under the fuse panel that was connected to the fuel pump relay. I believe it was a red and green wire. __________________ 1995 Wrangler 4.5L 8.8 Ford rear 4.11 gears ax-15 trans 4" lift 33" tires