Replacing Fuel Sending Unit. What else? - JeepForum.com
 
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post #1 of 7 Old 06-11-2021, 09:29 AM Thread Starter
YMFriday
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Replacing Fuel Sending Unit. What else?

I'm replacing the fuel sending unit on my '92 YJ 4.0. I'm 90% sure it has the 20 gallon tank, but I haven't owned it very long, so I'm not certain. I thought I ran out of gas yesterday, but gas didn't help, so I'll be dropping the tank. I was figuring to remove the filler & vent hoses while I have it down. Anything else I recommended while I have the tank dropped? I'd like to order everything from Quadratrec at once to take advantage of the free shipping.

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post #2 of 7 Old 06-11-2021, 04:02 PM
jbolty
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filler and vent hoses
pump/sender
check and/or replace the hoses between the tank and the vent, return and fuel
filter


have you checked for power to the pump before doing all this/

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post #3 of 7 Old 06-12-2021, 08:32 AM Thread Starter
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I have not. Any chance you have a link to a thread handy? If not I can search around.
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post #4 of 7 Old Yesterday, 01:45 AM
Chrisnvegas
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Before ordering, make sure it's not an export model. If it is, none of those parts will work.
There is a decal (or not) when you drop the windshield by the wiper motor. It will say "For export"

Export models (like mine) have a different tank, skid, pump and sender. The parts are long gone.
I came with a big beefy pump to handle poor quality fuel in other countries. Anything happens to an export pump or sender and it will need a new tank, skid plate, pump and sender because the shape of the tank is different.

Chances are it's a domestic model but you never know till you look.

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post #5 of 7 Old Yesterday, 10:07 AM
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first check all the fuses

I don't have a wiring diagram for that year but should not be hard to find. you should be able to unplug the harness from the tank without too much trouble. the pump should prime for a couple seconds when the key turns on then stops, unless the engine starts. during that time you can hear it. if there is no sound then check for voltage at the wire

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post #6 of 7 Old Yesterday, 12:13 PM Thread Starter
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I did check all fuses and the relay. They are all fine, but I don’t hear it prime. I’ll need to get the tool to check the voltage.

Thinking back, over the past few weeks I had some difficulty starting it, but I always seemed to be on an incline and I just assumed I was a little bit low and maybe the angle of the tank was telling me I need to fill up. It’s where I was going when it died, actually. When I was waiting for the tow truck, I tried to use some starting fluid to get it going and maybe get it out of the way. It started, but then died almost immediately. Pressing the gas pedal and manually moving the throttle didn’t do anything. And checking the stem on the fuel bar, I have no pressure. I used to be really handy with my old Jeep, but it’s been 17 years and I’ve forgotten quite a bit since I last worked on one.
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post #7 of 7 Old Yesterday, 08:28 PM
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in all likelihood the internal pump is bad but I refuse to throw parts at something until I know for sure. you just need a volt meter or test light

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