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Unread 04-15-2013, 03:10 PM   #1
Gigemags05
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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.

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Unread 04-15-2013, 03:53 PM   #2
CSP
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Is the pump getting power? The loose wire could have popped a fuse.
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Unread 04-15-2013, 04:19 PM   #3
Gigemags05
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I will check. I don't know where a fuse is for the fuel pump though. The hesco harness only came with two relays and one big fuse. Everything else is still getting power.
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Unread 04-15-2013, 05:16 PM   #4
Gigemags05
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Surely the ground wire coming loose wouldn't burn the pump up would it?

It was working great for a couple of weeks.
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Unread 04-16-2013, 12:21 AM   #5
Gigemags05
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Anyone got any ideas?
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Unread 04-16-2013, 12:49 AM   #6
SLO_Ken
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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.
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Unread 04-16-2013, 01:51 AM   #7
BagusJeep
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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.
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Unread 04-16-2013, 06:46 AM   #8
aggiejon
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I would swap out the fuel pump relay. That would be my first suspect. I highly doubt loss of ground would do anything to the fuel pump.
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Unread 04-16-2013, 08:29 AM   #9
CSP
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Have you tested for power? Have you checked the relay to see if it's getting power?

What have you done other than ask for more internet guesses?
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Unread 04-16-2013, 08:50 AM   #10
Gigemags05
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I've not been home to check yet.


I've gotten some good advice and will follow up
On those leads as soon as I can.


I apologize for not being an automotive expert. I've learned a ton from this forum, but I'm still a rookie and things that are very basic to some are still foreign to me.

I asked the question to get ideas on what to check. If it bothers you, please pass on the thread and read a different one.
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Unread 04-16-2013, 09:06 AM   #11
CSP
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The detail that you haven't been able to check anything yet is an important one to leave out. Not knowing that makes it look like you weren't willing to try anything that's been suggested so far.
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Unread 04-16-2013, 10:06 AM   #12
PERK
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an easy way to check the relay or run the fuel pump to prime is to pull the relay and jump # 30 and #87. pump will run constant if it has power.
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Unread 04-16-2013, 01:53 PM   #13
Gigemags05
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I checked the fuse on the harness and it was shot. So I replaced it, tried to start the jeep and it blew the fuse again.
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Unread 04-16-2013, 02:01 PM   #14
Gigemags05
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The fuse blows as soon as the key goes to the on position.

I didn't have time to check the relays, as I was just home for lunch. Would a bad relay blow the fuse?
This harness only has the one fuse and two relays.
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Unread 04-16-2013, 03:41 PM   #15
SLO_Ken
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Quote:
Originally Posted by Gigemags05 View Post
The fuse blows as soon as the key goes to the on position.

I didn't have time to check the relays, as I was just home for lunch. Would a bad relay blow the fuse?
This harness only has the one fuse and two relays.
Sounds like a short somewhere. How big is the fuse?

I don't know if a bad relay could blow the fuse, but a bad fuel pump definitely could.

These pumps are lubricated/cooled by the fuel flowing through them. If your pump went dry at any time, it could have damaged/seized the bearings or pump head, causing very high current draw.
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