91 wrangler fuel gauge stops at the half-way mark? - Jeep Wrangler Forum
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Old 04-07-2018, 12:03 AM
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91 wrangler fuel gauge stops at the half-way mark?

Was jokingly told by the PO that the fuel gauge is a "typical Jeep gauge" in that it'll stop at the half full mark and stick there so I'd better fill up when it his half. Well he was right. Is there a good fix for this or do I need to just fill up when it hits that mark? I use the odometer to monitor the gas use and I keep a 3 gallon fuel can in the back just in case.


Easy fix?


RnS

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Old 04-07-2018, 12:28 AM   #2
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I have no idea. Just wanted to say my fuel gauge on my 89 is a suggestion only.
I go by miles and keep a small 1 gallon can in the back.
I’ve gone to just filling it up when it gets to about half of a tank mostly because it only takes 5-10 minutes to fill it up that way.
lol.


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Old 04-07-2018, 10:00 AM   #3
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Try taking the gauges apart and cleaning all of the copper connections with a pencil eraser until they’re shiny-looking. They get pretty corroded back there and it can interfere with the signal from the sending unit.


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Old 04-07-2018, 01:09 PM   #4
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FSM (factory service manual) has a diagnostic test for the gauge and the sending unit. it's been said there's one on this forum for free. I haven't looked. I paid $35 for mine and it's been worth every penny
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Old 04-07-2018, 02:06 PM   #5
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There are a couple things that can cause this problem. The gauge, possibly. More likely in the tank, either the sending unit is corroded or the baffle is lose our warped.
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Old 04-07-2018, 02:07 PM   #6
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If you drop the tank, go ahead and do the 20 gal tank mod and if you are replacing the sending unit get the 20 gal one
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Old 04-07-2018, 10:46 PM
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Quote:
Originally Posted by dsaylor View Post
Try taking the gauges apart and cleaning all of the copper connections with a pencil eraser until they’re shiny-looking. They get pretty corroded back there and it can interfere with the signal from the sending unit.


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Did this and the gauge works past the half full/empty mark. Tested it today on a 300 mile run down south and back and it worked. Terrible cross winds running there and back and I made 16mpg. Darn soft top is like a sail in the wind.

Thanks for the info brother!
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Old 04-09-2018, 07:31 AM   #8
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Quote:
Originally Posted by RichnSteph View Post
Did this and the gauge works past the half full/empty mark. Tested it today on a 300 mile run down south and back and it worked. Terrible cross winds running there and back and I made 16mpg. Darn soft top is like a sail in the wind.



Thanks for the info brother!


Glad to hear it! I always check the least-expensive options first. Haha.


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Old 04-13-2018, 11:05 AM   #9
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How hard is the tank to drop down
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Old 04-13-2018, 12:16 PM   #10
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Old 04-13-2018, 12:52 PM   #11
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How hard is the tank to drop down
Its not that bad, you will want to run it low before doing it to cut down on the weight. Remove the filler neck and put a jack under it and take the skid plate loose and lower it down. May have to get creative going past exhaust pipe.

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