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Unread 11-04-2011, 02:52 PM   #1
baseball25s
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1966 CJ5 help

i have a 1966 CJ5 that i am trying to fix up and get running again
couple questions i have is what are the size of the stock tires( i have bf goodrench all terrains on there now but dsont know what size they are )

my carb is acting up and i would like to replace/rebuild it. wich direction should i go and how hard is it to rebuild or clean it
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Unread 11-04-2011, 03:10 PM   #2
John N
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If it's the OEM carb, it's pretty easy to rebuild.
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'81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s...............
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Unread 11-04-2011, 03:15 PM   #3
CO64CJ5
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My '64 originally had G78-15 bias ply tires, which translates to about 215-75-R15. I think you could go up to 235 without looking too far off-stock.

For the carb, it would help to know which carb you have. If you have a 4-cylinder engine, you probably have a Carter YF, which is pretty easy to rebuild.

Last edited by CO64CJ5; 11-04-2011 at 03:16 PM.. Reason: unfinished thought
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Unread 11-04-2011, 03:17 PM   #4
baseball25s
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i have the dauntless v6
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Unread 11-04-2011, 04:13 PM   #5
colojeepguy
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The V6 uses a Rochester 2G 2 bbl. carb,
As posted above, it's pretty easy to work on.
If you get it set up right they work well.
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Unread 11-14-2011, 03:08 PM   #6
baseball25s
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got another question for you experts

i sprayed carb cleaner in the carb and it does not die when i step on the gas anymore

my question is everytime i "get on it" it stuters and back fires real bad

would anyone know a solution to this?
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Unread 11-14-2011, 03:31 PM   #7
John N
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It could be timing related or just need a good basic tune-up. I'd start with points, condenser, plugs, distributor cap, rotor and plug wires...all very basic stuff. Set the timing and see what happens. If it continues, it may need a new timing chain and gears, very common to need this on the V-6, if it's never been done.
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'81 Scrambler w/ FI 360 AMC, 33x12.50 BFG M/T's, 5" of lift, ARB'd Dana 44's F & R, Dana 300 clocked & twin sticked w/4:1, Warn XD9000i, etc...
2002 Grand Cherokee Limited, 2008 Overland Grand Cherokee, a 1976 CJ-7 in pieces and 3 more off-brand 4x4s...............
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Unread 11-15-2011, 03:36 PM   #8
baseball25s
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i most likely need all that done anyway. I think it is the carb though becasue after driving it around the block last night it went back to dieing when i step on the gas. If i spray carb cleaner in the carb it runs fine for a couple days then goes back to doing the same thing
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Unread 11-15-2011, 04:10 PM   #9
CO64CJ5
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Depending on your definition of "get on it", it could be the accelerator pump. If you slowly open the throttle, does it run OK? That is, does the dying only happen when you open the throttle suddenly?

Look down the throat of the carb and see if you can see a little squirt of fuel when you open the throttle. If not, the accelerator pump isn't working right. However, if this is the problem, I can't account for the carb cleaner fixing it for a few days . . .

If you have a manual choke, you might try pulling a little choke when you step on it. Not as a normal operating procedure, but as a further troubleshooting technique.

It does sound like you need to rebuild the carb.
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Unread 11-15-2011, 08:06 PM   #10
Foundrydude
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You could also have partially clogged jets causing a lean condition leading to sputtering and backfiring. First step should be a carb rebuild. If cleaner improved it that's a sign you've got a debris problem. Good luck!
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Unread 11-16-2011, 01:40 PM   #11
baseball25s
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thanks for the help guys

is there anyway to clean the current carb or do i need to rebuild it?
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Unread 11-16-2011, 01:50 PM   #12
Foundrydude
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Rebuild it since if it needs cleaned out the internal seals (like the accelerator pump) are sure to be rotted or torn. With cleaning you always have a question. With rebuild you know.

That is a simple carb, barely more complicated than a lawnmower carb. Lay it out somewhere clean on a sheet of newspaper and tear it down.

good luck
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