Fuel Guage not working - JeepForum.com
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post #1 of 2 Old 01-22-2010, 05:25 AM Thread Starter
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1984 CJ7 
Join Date: Nov 2006
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Fuel Guage not working

Hi Everyone,

Sorry for the 2nd post I had another question for you. I have a 1984 jeep cj7 4cyl t-5. Recently my fuel guage quit working so i've been keeping track by writting my mileage down. How can i fix it? Also if it's the sending unit is it worth just intalling a new tank? In the next few months i'm planning on putting in a amc 360 and I could just put a new fuel tank in now but I wasn't planning on. Is it difficult to install? What size should I get if it's that route?



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post #2 of 2 Old 01-22-2010, 05:32 AM
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1986 CJ7 
Join Date: Mar 2007
Location: Danvers
Posts: 1,668
I believe a common problem is that the ground wire for the sending unit rots away. There's really no way to get to it without dropping the tank.

It would probably be worth it to change the sending unit, but unless there's a leak or something else wrong with the tank I don't see the point in changing that... when I did mine, the tubing that feeds the fuel lines was also on the verge of falling apart, so I just replaced the entire unit.

Here is a link to also help diagnose what may not be working.. scroll down to the "Fuel and Temperature Gauges" section..

Jeep CJ Gauge & Sender Diagnostics


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