So here's what happened from the start... I drove to work and parked... To that point I had ZERO problems with my rig. 8 hours later I get in to go home, I was in a hurry because of an emergency... I started to 'start' the truck, as I was turning the key I slapped her in 'drive', thinkin it had started, in an attempt to leave quickly... When I released the key, I realized it hadn't started... I then attempted to start it again and again and it wouldn't fire... It turns over JUST FINE... it just won't start, since the time I initially tried to start it, the low fuel light has been on and it doesn't read that there is any fuel... Needle stays dead on gauge... I thought maybe someone siphoned my tank so I put fuel in it, so I know the cap is on tight... There is spark at the battery and I've made sure all my relays and fuses work... And now ive replaced the ENTIRE fuel pump and module, assembly... That's where I'm at...

 

Have you unpluged your battery yet? Disconnect your battery cables for about five min then touch them together hook them back up and give it a try.

 

Yeah, I had them disconnected for a whole day while I did my pump...

 

normally when you turn the key to the ON position, you will hear the fuel pump priming. if your not hearing that, the pump has no or insufficient 12V. I would recommend a Chiltons or haynes repair manaul to trace the relays and fuses. Worst case, drop the tank, pull the pump and bench test with 12V source to make sure your pump IS good. You may jusy have a poor connection INSIDE where the pins are in the harness to the pump. Im willing to bet its a fuse or relay if the gauges are inop also. Hit those first. NOTE: If the pump isnt getting 12V your gauge will not work either

 

IFuel Pump, wires, module assembly EVERYTHING for the fuel pump is good... All connections at the tank are made, cap is on tight, relays test good... At a loss... Not sure what's up at all..

 

I'd look more into your ignition system at this point

 

Turns out it was just a CPS (Crank Sensor).. Well, I gotta new fuel pump outta this mystery... All I can do is laugh, thanks for all the advice guys!! Really...

 

I am confused how a crank sensor affected the gas gauge reading empty

 

im confused too. mine fires, then putters and dies. no sound from the pump at all. done replaced the ballist thing, fuel filter and nothing. before i heard the pump and it fired and ran, notta prob. now, no sound, jeep doesnt stay running.
ive been told that it could be the computer. does a 90 even have one?
surry fer hijacking.