I swapped a 92 4.0 into my cj a few weeks ago. I used an e2000 fuel pump.
Everything g was going great until yesterday. While I was driving, I noticed it sputtering like it wasn't getting fuel (I do have plenty of gas). Then after a mile or so it died.
I got under and inspected the fuel pump and noticed that the ground wire had come off of the post on the pump. I replaced it and tightened it thinking its solve the issue but now the jeep won't start at all. When I turn the key to on, I do not hear the pump come on at all.
Any idea what this could be? The pump is brand new and was working fine until yesterday.
Two things I would check first...
1) does the fuel pump still function? If you put 12V straight from the battery to the pump, does it spin?
2) is the fuel pump relay still good? I had the fuel pump relay on my Howell system just up and die for no apparent reason.
If both of these are still functioning, then I'd start investigating the wiring.
The cheapest and best tool in my box is a 12V test lamp, with long leads. I made it from a $5 inspection lamp. It is better than a voltmeter as it only lights up when you have real power which can propel something, whereas a voltmeter will show only potential difference.
You need to get under there and find the voltage. Hook one end to the battery negative and have a search.
If you do not have voltage at the pump, look back and find the fuel pump relay. My guess is that you have a relay which is not working.