Replacing Fuel Sending Unit -
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post #1 of 7 Old 06-29-2004, 02:57 PM Thread Starter
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Replacing Fuel Sending Unit


I have the infamous bouncy fuel gauge so I was going to replace the Fuel Sending Unit. I assume this unit is on/in the fuel tank.

Any advise from someone that's done this would be great. Part numbers and/pics would also help.



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post #2 of 7 Old 06-30-2004, 06:10 AM
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for my 94 ZJ, the fuel sending unit was part of the fuel pump, in the tank. depending on your year/model it may be the same situation.

i supposed if you're going to do all the work to drop the tank, and you have high miles, you may just want to replace the fuel pump as well if you're 100% certain it's the sender (and assuming it can't be fixed cheaply)


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post #3 of 7 Old 06-30-2004, 01:06 PM Thread Starter
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thanks steve

yeah, it's a 1998 GC. I have access to a lift but was hoping i didn't want to drop the tank if I didn't have to.

If anyone has replaces the sending unit before I'd love to hear the war stories.


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post #4 of 7 Old 06-30-2004, 01:11 PM
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screw all that dropping of the tank BS. do the Swampy Bypass Mod instead. You'll be MUCH happier.

2000 WJ Limited - 2.5" Rusty's springs WAAG 1-piece front brush guard custom built WAAG nerf bars PIAA 580 lighting Custom Paint One-off Aluminum Treadplate Door Entry Guards & Rear Bumper Step
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post #5 of 7 Old 06-30-2004, 01:16 PM Thread Starter
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good idea but....

Thanks for the link!

The only issue is that it's not my car, I'm doing it for a friend!! I don't think she'd like me cutting holes in her rig! If it were mine, no problem!

Thanks again! I used in-line pumps on my race car and prefer them!

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post #6 of 7 Old 06-30-2004, 02:52 PM
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Yep you got to lower the gas tank. I did mine without a lift; I just jacked the rear up a bit to allow the tank to swing down. I live in the North East, so the two hanger bolts were rusted on. I used a hacksaw blade in my hands to saw them off. You can access the worm clamps on the fuel tank fill-tube & vent line without removing the rear tire. Once the tank is removed you can wipe the inside of the tank clean. I paid $308.00 at my local parts store for a replacement gas pump/sending unit.

Cheers Steve

94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new

88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new
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post #7 of 7 Old 06-30-2004, 03:08 PM
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exactly. jacked the rear of the jeep up on stands, and dropped the tank. paid about $300 for the pump.

overall, the job wasn't nearly as tough as i thought.

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