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Discussion Starter · #1 ·
My gas gauge suddenly drops while I'm drive, like it thinks my Jeep is off, that's how far it's dropping. I've had this issue before but today it would show 1/4 of a tank and then go back down immediately. What could be causing this?
 

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That ain't a gas gauge, that right there is a guess gauge
Now that's funny.

It's probably just sticking. Although mine doesn't drop completely it doesn't read the same as it did a few years back. I pay more attention to the odometer than I do the fuel gauge.
 

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Discussion Starter · #6 ·
After filling the tank it doesn't move like it did. This is probably a stupid question, but I'm going to ask it anyway..,how do you use your odometer as a "gas gauge"?
 

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Figure out how miles you get to a tank, or 3/4 of a tank. Then reset your trip odometer every time you fill up, or just pay attention to how many miles you've driven since your last fill up
 

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My guess would be sending unit failure or bad ground if that is the only gauge acting up.

Does it only do it when it reaches a fuel level or is it anytime no matter level in tank?
 

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My current TJ's sending unit had two 'dead' spots in it. As my fuel level dropped to just the right amount, the gauge would go totally dead... but then once I got below the critical level, it would suddenly spring back to life and work normally. One dead spot was just above 1/2 tank, and the other spot was right at the top of the red zone.

Replacing the sending unit fixed this.
 

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Discussion Starter · #10 ·
I guess it's only at a certain point because now that its full it doesn't do it anymore. I guess I'll see in a few days when I have to fill up again.
 

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Does anyone know if there is an after market fix for the sending unit in the Wrangler? I’m a rural route carrier and I think the bumpy roads cause the issue. I replaced the fuel pump / sending unit and it worked fine for a couple months then back to the same issue. It indicates correctly when first started but goes to empty After a little driving.
 

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Does anyone know if there is an after market fix for the sending unit in the Wrangler? I’m a rural route carrier and I think the bumpy roads cause the issue. I replaced the fuel pump / sending unit and it worked fine for a couple months then back to the same issue. It indicates correctly when first started but goes to empty After a little driving.
I changed my fuel pump nearly two years ago and had an intermittent non start. The issue was the contacts in the loom side connector. I took it apart and closed the terminals up slightly. I could feel the difference it made when pushing the connector back together. I've had no problems since. I couldn't swear to it but it seemed to me like the pins in the connector on the new pump were ever so slightly thinner than the original pump.
 
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