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Unread 07-09-2007, 06:39 PM   #1
atomicflatulenc
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1985 CJ7 
 
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Location: Pemberton, NJ
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fuel gauge not functioning properly

just bought an 85 CJ7, and I have a few bugs to work out. Well more than a few. I'm gonna start a thread for each.

Fuel gauge goes up to full when filled, but stops or gets stuck at half full. Found out the hard way, when I ranout of gas.

Unfortunately, the odometer is working either. Gonna work on that next.

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Unread 07-10-2007, 10:06 AM   #2
atom73
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Fuel sending unit is in the gas tank, its basically a mechanical toilet bowl float. If that sticks it would cause your problem. Mine was completely rusted when i bought my CJ5. It was so bad that it looked like rust corn flakes, I went ahead and replaced the tank, sending unit, lines, pump, and now carb because of all the rust that had been sent through that fuel system. Check your sending unit, you will have to drop the tank to do this.
Mike
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Unread 07-10-2007, 01:38 PM   #3
GPER
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http://www.terrainstompers.com/forum...opic.php?t=861
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Unread 07-10-2007, 03:34 PM   #4
atomicflatulenc
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That's a great idea... but lets just say the odometer is also not working...then what???

I checked the wires going into the odometer, but where do they go to? I can't find it in any of my manuals.
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'85 CJ7, 258 4.2 Howell TBI, NP435, twin sticked Dana300, 4.56 Yukon chromoly: Rear20-extra thick tubes, shaved,trussed,discbrakes,ARB: Front30- flipped tierod,Detroit EZ locker, warn hubs: 3.5" BDS YJ springs and booster, 35" Trxus M/T's, rhino'd, full roll cage, borgenson steering shaft, big daddy steering box bracket...Unknown OIL Leak(working on it...)
FOR SALE $6000
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Unread 07-10-2007, 07:05 PM   #5
atom73
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I am not sure about the odometer, mine is just a shaft driven gear that runs from the tranny to the back of the odo. Its all mechanical and has no electricity in it so if its not working its likely the speedo cable (its a rotating cable that drives the gears in the odo and speedo). Thats on a 77 CJ5 though, I wouldnt think that an 85 is digital though. When I bought mine the PO had taped the speedo cable to the tranny housing, it didnt work, just kept it from dragging. You probably need a new speedo cable as well as the sending unit for fuel. Once you get that stuff fixed you will be finding other little buggers that need replacing.
Mike
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Unread 07-10-2007, 07:35 PM   #6
bdmonist
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There is cable from your TC to the back of the speedometer. make sure it is connected at both ends.

Use this for troubleshooting other guages.
http://users.adelphia.net/~john.stre...eQuickTest.htm
http://users.adelphia.net/~john.stre...QuickFacts.htm
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Unread 07-10-2007, 08:54 PM   #7
JarWithLid
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Quote:
Originally Posted by atomicflatulenc
That's a great idea... but lets just say the odometer is also not working...then what???
Two things:

1. If your speedo works, but odo doesn't, it's something mechanical inside your gauge cluster. Both broke = cable (most likely).
2. Use the search feature on this forum. All of these questions have been answered before, in depth.


http://users.adelphia.net/~john.stre...eQuickTest.htm
http://users.adelphia.net/~john.stre...for_cj_gau.htm
http://users.adelphia.net/~john.stre...e%20Theory.htm
http://users.adelphia.net/~john.stre...QuickFacts.htm

I found all that searching these forums. It's just that easy...
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Unread 07-10-2007, 09:02 PM   #8
atomicflatulenc
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I always try searching first, but never seam to find what I'm looking for as fast as you guys can answer. Thanks for the help!

I can't understand any of that stuff anyway...just gonna have to open the wallet and let a guru take care of it...
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'85 CJ7, 258 4.2 Howell TBI, NP435, twin sticked Dana300, 4.56 Yukon chromoly: Rear20-extra thick tubes, shaved,trussed,discbrakes,ARB: Front30- flipped tierod,Detroit EZ locker, warn hubs: 3.5" BDS YJ springs and booster, 35" Trxus M/T's, rhino'd, full roll cage, borgenson steering shaft, big daddy steering box bracket...Unknown OIL Leak(working on it...)
FOR SALE $6000
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Unread 07-10-2007, 10:01 PM   #9
bdmonist
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Quote:
Originally Posted by atomicflatulenc
I always try searching first, but never seam to find what I'm looking for as fast as you guys can answer. Thanks for the help!

I can't understand any of that stuff anyway...just gonna have to open the wallet and let a guru take care of it...
If that's your answer you are not using this forum for what is here for. If you turn to someone else to fix everything that goes wrong with your Jeep, you'll be broke and won't know anything more than when you started. Take some time and read the articles. Print them out and go step by step and test your guages to see how they work, and if they are working properly. Fixing a speedo cable is as simple as it gets - Give it a try, don't give to someone else to do it, or you'll never be able to afford your Jeep.
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1984 CJ 7, SBC 350TBI, 700R4, D 300, AMC 20, D30, 35" Mickeys, 3.54 Gears, 4" susp. Lift, 2" body lift.

AMC 20 Write Up
In Progress - 4.56 gears, Aussie Rear Locker, Moser 1 Piece Axles
Coming Soon - CV Shafts, Welded Tubes, trusses
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Unread 07-12-2007, 11:34 AM   #10
atomicflatulenc
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testing the gauges seems like the hard part. I've always had trouble with meters...burn them out almost every time. I'll probably end up doing more damage.
__________________
'85 CJ7, 258 4.2 Howell TBI, NP435, twin sticked Dana300, 4.56 Yukon chromoly: Rear20-extra thick tubes, shaved,trussed,discbrakes,ARB: Front30- flipped tierod,Detroit EZ locker, warn hubs: 3.5" BDS YJ springs and booster, 35" Trxus M/T's, rhino'd, full roll cage, borgenson steering shaft, big daddy steering box bracket...Unknown OIL Leak(working on it...)
FOR SALE $6000
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Unread 07-12-2007, 11:47 AM   #11
jbo-cj7
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Just try it, if you really can't get it fixed then take it to someone. Its not going to hurt you to try it plus you might learn a thing or two about your rig. Sounds like you don't want to take the time to do it but it might benefit you if you do.
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Unread 07-12-2007, 11:53 AM   #12
atomicflatulenc
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Its not a time thing, just don't want to end up paying more to fix my mistakes.
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'85 CJ7, 258 4.2 Howell TBI, NP435, twin sticked Dana300, 4.56 Yukon chromoly: Rear20-extra thick tubes, shaved,trussed,discbrakes,ARB: Front30- flipped tierod,Detroit EZ locker, warn hubs: 3.5" BDS YJ springs and booster, 35" Trxus M/T's, rhino'd, full roll cage, borgenson steering shaft, big daddy steering box bracket...Unknown OIL Leak(working on it...)
FOR SALE $6000
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