Timing Problem Question - JeepForum.com

 
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post #1 of 10 Old 12-06-2007, 07:28 AM Thread Starter
Ehlien
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Timing Problem Question

I'm looking for some advise/best guesses on deteriorating driveability.
I have a carbed engine with automatic trans.
When cold the vehicle wants to stall when you apply load and you have to get it well warmed up before it will pull away without wanting to stall right out unless you rev it very high
When your driving and acellerate sometimes it will intitally stumble or hesitate
Sometimes it will puff or backfire after it is turned off.
I suspect its the timing shifting to more advanced timing.
Best guesses??
Other possibilites?

Thanks

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post #2 of 10 Old 12-06-2007, 07:54 AM
Mr.Crowley
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if it is the cater carb with the metering rods they sound clogged..Easy fix..front of carb has a plastic do-hicky on top,unscrew pull off and clean out..re-install..most idle problems are that..
http://http://www.jeeptech.com/engine/carter.html

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post #3 of 10 Old 12-06-2007, 08:12 AM Thread Starter
Ehlien
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No unfortunatly its not a stock engine. Its a 350 chevy with an eldebrock card which I think is a rochester or carter knock off .

So you don't think the brute's timing is off?
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post #4 of 10 Old 12-06-2007, 09:53 AM
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Have you checked the choke to make sure its working properly?

Do you have an electronic choke, or a manual one?

If your choke is sticking at or near the closed position, your carb will be
starved for air, and give you all the bad drivability issues you are describing.

When your Jeep is cold, the choke should close, and as your Jeep is warming
up, it will open slowly until it reaches its full open position.

If its not set right, or the choke pull off is not functioning correctly then
the choke plate can stay closed even after the engine has warmed up, and
the engine will not be able to get the right amount of air it needs.

Also, make sure if your distributor has a vacuum advance to it, that its
working properly, and that you are getting vacuum to it.

If your distributor is a mechanical advance, make sure the weights are
not stuck, and that they can move freely.

If your distributor is not advancing properly, that can cause off idle problems
too.

Alot of backfiring problems are caused by a carb being out of wack, and
not set up correctly. Check the specs on your carb, and get a re-build
kit for it if its not in good shape, and out of spec for your Jeep.

Most times, a simple re-build with a $20.00 kit, and all the proper adjustments
are all it will take to get your carb functioning properly again.

Jim
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post #5 of 10 Old 12-06-2007, 10:20 AM
Mr.Crowley
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Quote:
Originally Posted by Ehlien
No unfortunatly its not a stock engine. Its a 350 chevy with an eldebrock card which I think is a rochester or carter knock off .

So you don't think the brute's timing is off?
well thats a horse of a different color then..check the choke..once you make sure the chokes working correctly then move onto the timing..And edelbrock carb is fairly simple to mess with..

1980 cj7 258 weber,5'' of lift,33'' boggers,lincoln locked,lockright and a snorkle...Khaki Jeep Club member No. 1
1984 cj8 350 on 35's..the wifes
Quote:
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"offroad it, and wave then you might understand"
BLS Home Chapter... Where it all Started
:hahaha: yj

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post #6 of 10 Old 12-06-2007, 12:27 PM Thread Starter
Ehlien
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I'll check that one out. It just might be the choke. It's a mechanical choke and the cable works for crap. I'll be its sticking !!!!!!!!!!!!!!!!!!! It's realaly not set up for cold weather running. It would probably be better to swap it out for an electrical choke.
Thanks
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post #7 of 10 Old 12-06-2007, 12:47 PM
Mike Romain
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Quote:
Originally Posted by Ehlien
I'll check that one out. It just might be the choke. It's a mechanical choke and the cable works for crap. I'll be its sticking !!!!!!!!!!!!!!!!!!! It's realaly not set up for cold weather running. It would probably be better to swap it out for an electrical choke.
Thanks
Mechanical chokes usually work best in the real cold.

One thing that can cause your symptoms is a lack of heat pipe. The air filter should have a hot air intake from the exhaust that opens when cold so it sucks warmed air. The carb can ice up without it and be boggy or even freeze solid.

Mike
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post #8 of 10 Old 12-06-2007, 12:58 PM
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post #9 of 10 Old 12-06-2007, 04:19 PM
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Quote:
Originally Posted by Mike Romain
Mechanical chokes usually work best in the real cold.
While I also believe it is a choke related issue, I tend to disagree with this statement. I have found that a properly set up auto choke will virtually always work as well or better and is invisible 99% of the time.
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post #10 of 10 Old 12-06-2007, 08:55 PM Thread Starter
Ehlien
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Well the heat riser tube is missing too so that could be an issue too.
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