hypodiesel06

hello everyone. i have a 96 xj with a 4.0L, and it has died, and it is driving me nuts trying to figure out what is wrong. Well......the problem all started last weekend at haspin. i was riding some trails when it started to spit and sputter, i had to keep pumping the gas pedal to even keep it running, after about a min of doing that it came out if it and ran great. it did this a couple times that weekend. i drove it 3 hours home and it did great. went to work the next day and left work, went to a buddies house and it started doing it again in his drive way, but this time it stalled, and has not ran since. the fuel pump was not coming on, so i figured this was the problem. so i put a new fuel pump, sock, and fuel filter on. well.... pump is still not coming on!!! have no pressure at rail. any kind of ideas would be great. thanks alot!!!!!!

hypodiesel06

did an ohms test on crank sensor and it passed? I have no idea?

jaqattack02

What about the relay for the fuel pump? Tried replacing that? What about the wiring to the pump? Have you had someone sit back there and verify that the new pump is coming on?

JeepingDan

X2

hypodiesel06

bought new relay. and definate pump is not coming on. and i unplugged it there at the plug and im only getting 4v back there?? 12v at relay. i could really use a wiring schematic., if any one knows where there is one at. does the computer have anything to do with fuel pump. i hear it does. if i can get wiring diagram i would be set.

FlyingLow

Dunno if it'll help but try a Haynes manual. Most problems can be figured out with one of them. Worth their weight in gold.

hypodiesel06

yeah....ill probably have to get one of them

FlyingLow

If Haynes doesn't have it try a Chilton. A little older, a little harder to find, but basicly the same idea. Best of luck

hypodiesel06

thanks man!!!

jaqattack02

Sounds like it's probably a wiring problem. Definitely pick up a Haynes manual, they're a great investment. A computer issue is possible, but I'd be willing to bet that the Haynes manual will have a way of diagnosing if it's a computer issue. If I think about I'll look later.

hypodiesel06

well.....the jeep is going to the shop!!! im not very good with wiring issues and im gettin pretty frustrated!!! ill let you all know what the verdict is when i get it back?!!!!

hypodiesel06

well the verdict is in!!!!! after spending all this money, fuel pump, filter, and crank position sensor. it turned out to be a broke wire under my rear seat!!!!!!!!!!! so this problem is solved. should have took a little more time and traced some wires!!!!!!!!!!!