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Unread 08-29-2013, 10:42 AM   #46
LumpyGrits
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What gauge wire are you using?
Your pull'n to many amps through to long a 'run' and under sized wire. That why it's HOT!!!!!!!!!!!!!
That is a fire hazard!!
STOP driving it till this is fixed......
LG

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Unread 08-29-2013, 10:57 AM   #47
Gigemags05
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It's the fuel pump wiring that came with the harness. It is awful thin. I'd guess 16 gauge, maybe 18.

So the hot wires could be the cause of the jeep dying?

Also, the wiring is run down the frame near the exhaust. Should I run it down the opposite side?
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Unread 08-29-2013, 10:59 AM   #48
SLO_Ken
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Quote:
Originally Posted by LumpyGrits View Post
What gauge wire are you using?
Your pull'n to many amps through to long a 'run' and under sized wire. That why it's HOT!!!!!!!!!!!!!
That is a fire hazard!!
STOP driving it till this is fixed......
LG
What gauge wire do you suggest? I also just installed an electric fuel pump near the tank. The pump reportedly pulls ~5A, although I have not personally measured it. I used 12awg stranded wire for power and ground.
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Unread 08-29-2013, 11:09 AM   #49
LumpyGrits
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12 ga. stranded is good.
Also measure votes at the pump. You must see at least 12VDC. DC motors don't like lower voltage than what they are rated for.
YES, get the wire away from exhaust heat. Bet you may have some burned insulation that is grounding the hot wire.
LG
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Unread 08-29-2013, 11:14 AM   #50
Gigemags05
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Thanks! I bet that's it, too
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Unread 09-07-2013, 04:46 PM   #51
Gigemags05
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Update:

Replaced all the fuel pump wiring and rerouted it along the opposite rail.

It's only been driven about 5 miles, but it didn't die. I've got my fingers crossed that it fixed the problem.
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Unread 09-22-2013, 02:19 PM   #52
Gigemags05
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Well, I'm about at my wit's end. I thought I'd finally fixed it, but today it cut out and died on me again. It had been running fine for a week or so. Drove it about 15 miles today and it cut out and died as I was almost home.

I haven't got a clue what could be causing this.
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Unread 09-22-2013, 04:32 PM   #53
LumpyGrits
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Are the FP wires hot again?
LG
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Unread 09-22-2013, 05:32 PM   #54
Gigemags05
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Yes, pretty warm.
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Unread 09-22-2013, 05:42 PM   #55
LumpyGrits
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Then I still feel you FP is bad. It's cut'n out. The wires should not be warm other than air temp induced.
You did rewire it with 12 ga stranded wire, correct?
I don't recall now-----Did you try another FP?
LG
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Unread 09-22-2013, 06:07 PM   #56
Gigemags05
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I did not use 12 gauge stranded. I used the same size wire that was previously used on the harness, which came from hesco. I believe it's 14 gauge. Maybe even 16. It's awfully small. The reason I didn't go larger is that I wasn't sure how to splice the much thicker 12 gauge wire with the smaller hesco wiring.

I did not try a new fuel pump. When I talked to the tech at air tech, they assured me tat my pump was running within spec and that I must have faulty wiring.

I'll call them back tomorrow and explain that the fp is cutting out.

Also, should I call hesco and ask which wiring I should be using?
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Unread 09-23-2013, 12:56 AM   #57
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If you feel your wiring is undersize just replace it. A few feet of good quality wire in 12 or 10 gauge will do it. Get yourself a soldering iron, some solder and some heat shrink sleeve, cut and twist the wires together, solder them and get the heat shrink over the top.

If you have too small a gauge it may not burn but the volts will drop and low voltage will lead to problems at the pump.

Also make sure you have a return ground to the battery that is at least as large. DC current flows round the circuit so any restriction anywhere will be an issue.
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Unread 09-23-2013, 10:02 AM   #58
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I contacted both airtex and Hesco this morning.

Airtex tech told me that I am probably overworking my pump due to having an inline filter before the pump (in addition to what is presumed to be a screen inside the tank). He claims that since the E2000 is made to push rather than pull, that the micron filter is making it work too hard. Also said the pump is most likely shot, and that it should be under warranty, just to take it back to where I got it from.

Benny at Hesco thinks it might be a ventilation issue. He said many times with an old jeep the valves, etc, get clogged and the tank isn't venting properly. That would make the pump have to work too hard and shut down. He reccommended drilling a small hole in the gas cap. Also said that the wiring that is used on the Harness is directly from Chrysler, so it should be just fine.

Does anyone know how to check and see if my ventilation system is functioning properly in the tank? If its a ventilation issue, is his suggestion of drilling a hole in the cap a valid one? How big of a hole?

Should I remove the fuel filter? That seems weird to me.
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Unread 09-23-2013, 11:35 AM   #59
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To check if the tank is venting run the jeep for a few minutes and while it is running take the gas cap off. If you get any kind of whoosh sound it's probably lacking ventilation.

Considering the pump mfr. has told you the 1 micron filter is likely the culprit I'd start there. Remove it from the system and see if the problem persists. If the pump is warrantied, might as well get a new one while you're at it as well.
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Unread 09-23-2013, 11:56 AM   #60
Gigemags05
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ok thanks for the tip, I'll test the ventilation tonight.

I have already contacted the dealer I bought the pump from and they are replacing the pump free of charge.


The reason I am weary of running the pump without the filter is because every build thread that I have seen mentions using an inline fuel filter before the pump. But if the manufacturer is telling me not to, then I will abide by his advice.
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