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post #1 of 4 Old 05-16-2003, 08:42 AM Thread Starter
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Join Date: May 2003
Location: south dakota
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gas gauge

how hard is it to replace the gas gauge in a cj-7?


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post #2 of 4 Old 05-16-2003, 03:06 PM
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1979 CJ5 
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Location: Rancho Cucamonga
Posts: 23
Why do you need to replace it? Is it discolored or disfunctional?

Before you replace it, are you sure it is bad? If it's not reading, the problem "May" be in the Wiring or the Sending-Unit in the Gas-Tank.

Sometimes it's a loose or corroded wire/connection or a bad ground-strap to the outer sending-unit. Other times the Float in the tank has developed a leak (Brass Float) or the Resister-Strip that the Float-Arm bears against has burned out.

You can check connections and the continuity of the wire to the tank, and check the guage by Grounding-Out the wire that leads to the tank.

You can test the Sending Unit by removing it from the Gas-Tank (probably need to Drain/Drop tank to get at it) and can test the Unit with a Volt/Ohm Meter/Tester.
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post #3 of 4 Old 05-16-2003, 05:07 PM
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1978 CJ7 
Join Date: Jan 2003
Location: Lancaster
Posts: 1,761

1978 cj-7 had since 1979
401 .030 over- full floating flat top pistons
crower solid cam 292 dur .500/.510 lift
turbo 400 tranny 2500 stall
model 20 transfer case
aj delux glass body
4" lift
dana 30 frount
dana 44 rear
4.56 gears
13.461 @ 92.45 mph on 37" super swampers on 1/4 mile
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post #4 of 4 Old 05-17-2003, 03:28 PM Thread Starter
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its disfunctional. its on my uncles jeep that i was thinking of buying from him and i was just wondering if it was to hard to do or not.

thanks for all the info and the link.
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