No fuel pressure.

[kevin92xj]

So over the last few years, I havn't drivin the Jeep much but on occassion it tends to crank no start. a couple times it started again after beating on the fuel pump/tank with a mag light. So I figured the pump was going bad. So this week I finally replaced the fuel pump with a replacement Airtex assembly/module. Thought it was all good and drove it to work a couple times during the week, then tonight after work I jumped in and same old crank no start. Swapped relays, jiggled wires, checked connectors, nothing helped. Has good spark, has no fuel pressure. I did notice the wires at the pump felt warm, which leads me to believe the new pump is shorting/bad. Anyone have any suggestions before I slash the tires and set it on fire? I'll take the old fuel pump with me tomarrow to see if it works with the existing wiring, also going to take a multimeter to check voltage and grounds. Its a 92 XJ 4.6l, AW4. :explosion

 

[BigDog]

Sounds like you might being getting a short somewhere to me and seeing how it was doing it before I would lean more to it being somewhere else not in the pump.

 

["beej"]

try bypassing the fuel pump resistor (white ceramic block on drivers side fender near air box, they get unplugged or have a loose connection it can casue all kinds of werid issues with the fuel pump)

 

[kevin92xj]

try bypassing the fuel pump resistor (white ceramic block on drivers side fender near air box, they get unplugged or have a loose connection it can casue all kinds of werid issues with the fuel pump)

I'll have to check it out. thanks!

 

[Mitchen]

try bypassing the fuel pump resistor (white ceramic block on drivers side fender near air box, they get unplugged or have a loose connection it can casue all kinds of werid issues with the fuel pump)

i believe that resistor is only on renix motors correct me if im wrong. never seen it in a HO


also check the regulator deal on the fuel rail my friends was clogged or something to that extent and would intermittently work some days and others it wouldnt.

 

[ruger81]

They are on a HO as well


This needs moved to oem tech

 

[Muddy Beast]

Fuel filter clogged? That could cause things to get hot if your pump was over working...I imagine.

 

[kevin92xj]

Fuel filter clogged? That could cause things to get hot if your pump was over working...I imagine.

I changed the filter when I changed the pump, so it better not be clogged. I think I'm gonna do an inline pump to solve all this.