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#6806476 - 06/27/17 08:52 PM Re: Is there a mechanic in the house? [Re: CharlieCTx]
Wilhunt Offline
Veteran Tracker

Registered: 07/26/13
Posts: 3307
Loc: New Braunfels, San Saba county
Originally Posted By: CharlieCTx
How about start it and pull one wire at a time? If it doesn't stumble when pulled that could help ID a bad wire.

Does it have a stock exhaust manifold or header? If it has a header, after fresh/cold start, check temp on each header tube for one that is cooler than the others (not firing and/or not firing regularly). You can use a grease pencil, candle, drops of water, etc.

It does have stock exhaust. I have pulled the wires as mentioned and it was hard to tell much difference on all except the first 2 cylinders. Wires are new but might be a problem anyway.


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#6806481 - 06/27/17 08:56 PM Re: Is there a mechanic in the house? [Re: Wilhunt]
Wilhunt Offline
Veteran Tracker

Registered: 07/26/13
Posts: 3307
Loc: New Braunfels, San Saba county
Cast I will do the spark plug test as mentioned and check spark from distributor. Will get back next Monday or Tuesday.

Thanks all.

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#6822909 - 07/14/17 06:12 PM Re: Is there a mechanic in the house? [Re: Wilhunt]
RustyMetal Offline
Outdoorsman

Registered: 04/21/17
Posts: 84
Loc: Freeport,Tx
I think TEXASLEFTY was on to something.

Pull your distributor and check the gear on the bottom of the dizzy shaft.
These Jeeps have been know to eat distributor gears after they get fairly worn.

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#6822913 - 07/14/17 06:17 PM Re: Is there a mechanic in the house? [Re: Wilhunt]
RustyMetal Offline
Outdoorsman

Registered: 04/21/17
Posts: 84
Loc: Freeport,Tx
If that's ok, then it may be worth your time to pull the front end off the engine (water pump, etc.) and check the cam timing gears & chain. If you have a lot of miles on that re-(factory?)build then there is a good chance you have a stretched out timing chain.

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#6822945 - 07/14/17 06:51 PM Re: Is there a mechanic in the house? [Re: RustyMetal]
TEXASLEFTY Offline
THF Trophy Hunter

Registered: 10/26/07
Posts: 8734
Loc: The Island Cres
Originally Posted By: RustyMetal
If that's ok, then it may be worth your time to pull the front end off the engine (water pump, etc.) and check the cam timing gears & chain. If you have a lot of miles on that re-(factory?)build then there is a good chance you have a stretched out timing chain.


Not trying to stir the pot here but...............

If the timing chain stretched or the cam/crank gear jumped one or more teeth... I think it would have an extended crank to go with all the other complaints. The other compliant would not be a dead miss that goes away at higher RPM's I think it would be a slight miss with very low power at low rpms and more power than normal at higher RPM's.
_________________________
Originally Posted By: Chunky Monkey
Never been to a camping world. I prefer Dick's to be honest.

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#6823104 - 07/14/17 09:35 PM Re: Is there a mechanic in the house? [Re: Wilhunt]
RustyMetal Offline
Outdoorsman

Registered: 04/21/17
Posts: 84
Loc: Freeport,Tx
No stirring thought...

I didn't mean jumped a tooth, I just meant the chain being stretched out.
Pulling one way and then another under normal driving conditions can result funky running.
(The cam timing advancing and retarding.) And going by the mileage, the factory type timing chains usually don't last more than 60-75k before they start stretching out where they are noticeable. Double roller chains last a little longer, but they don't put them on them at the factory.

I have an '81 v8 (360) that ran rough and funky, and when I put a new chain & gears on it, it ran smooth as glass.

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#6823418 - 07/15/17 11:47 AM Re: Is there a mechanic in the house? [Re: Wilhunt]
Wilhunt Offline
Veteran Tracker

Registered: 07/26/13
Posts: 3307
Loc: New Braunfels, San Saba county
If it had a stretched chain or jumped a tooth wouldn't there be backfiring thru the carburetor? Have not pulled the distributor. Jeep still has a slight miss at high idle speed. has enough power but also has too much blue smoke. Starting to think about valve guide seals and or a for sale sign.

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#6823486 - 07/15/17 02:14 PM Re: Is there a mechanic in the house? [Re: Wilhunt]
RustyMetal Offline
Outdoorsman

Registered: 04/21/17
Posts: 84
Loc: Freeport,Tx
There can be spitting back through the carb, I guess. But that is more typical of the distributor timing being waaay out of whack. In my experiences, spitting back thru the carb is typical of the distributor being 180* off, and it not running at all.

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