1986 Jeep CJ7 Stalling while driving

Tiny
IRWIN93
  • MEMBER
  • 1986 JEEP CJ7
  • 6 CYL
  • 4WD
  • MANUAL
  • 250,000 MILES
Hi, I have a 1986 jeep cj7. I bought it 5 years ago and am trying to get it going again after sitting for about 3 years. I changed the fuel filter, plugs, wires, changed the fluids, battery. It starts and runs great up until it heats up (gets to operating temp) Once it hits a certain temperature while driving, it starts to sputter, gag and eventually stalls out. I have to pull over and let it cool down. Once it cools down, it starts fine until it reaches the temperature again and it stalls out again. I replaced the carb in it with the same one that was in there. It was/is an Autoline c6213 carb. I noticed that there was no electrical going to the stepper motor on this carb so not sure if the previous owner wired it differently so you can bypass the stepper motor. I do notice that when it is started the metering pins do not move and once it reaches operating temperature, the pin still remains the same.

A couple things to note. The jeep will idle at operating temperature forever. It doesn't miss a beat until you get driving it for a few minutes and then it starts to stall. After making it back from the road and is hot, it will still remain idling without any problems. I have looked for vacuum leaks and everything seems okay. I have not changed the vacuum lines as of yet. When I bought this jeep it ran great for 2 straight summers and I have not done anything different to the jeep. Any direction would be appreciated as I am learning about the 4.2 L I am not sure all that has been modified as some electrical and some vacuum lines seem to be plugged etc.

A couple questions:

1.) Should I replace the carb again but use the model Autoline c6214? This model does not have the stepper motor.

2.) On this new carb there was not a linkage to hook up the Manual choke. I will not be driving this jeep in the winter so do I need to have a manual choke?

3.)Could a bad fuel pump be the cause of this problem?

4.) Any direction would be grateful I really want to get my jeep roadworthy again. Thanks so much for your time. This site is awesome.


Joel

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Friday, July 8th, 2011 AT 3:01 AM

11 Replies

Tiny
CJ MEDEVAC
  • EXPERT
I'll be right back with a bunch of stuff to look over!

The Medic
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Friday, July 8th, 2011 AT 3:33 AM
Tiny
CJ MEDEVAC
  • EXPERT
This will save me a bunch of hunting and pecking!

These 2 posts, are the same feller

He's a trooper!

I've been waiting for you to finally show up here!

CJs, being the best constructed vehicles ever, prevent them from tearing up!

I have nothing to do for long periods of time, 'cept try to answer what I can at other forums!

Some of this, does pertain to you, but maybe not, for years to come!

You will probably see the stuff you want answers to---I think you need a original type ('79) BBD carb---Or if you like better, one like mine! (you should see my under hood pics)

Once you run thru this stuff....I will assist you all I can, you will see how far I will go in these posts!

Return---Ask questions!!!....Be more specific with your wants, do they check your emissions?.......Don't leave me hanging!

http://www.2carpros.com/questions/1980-jeep-cj7-v8-wont-start

http://www.2carpros.com/questions/1980-jeep-cj7-timingtuning-problem-with-a

The Medic
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Friday, July 8th, 2011 AT 3:48 AM
Tiny
IRWIN93
  • MEMBER
I am in BC canada and they do not check emissions here. I have read through about half of the info on the links you sent me. I will have to continue reading and see if it pertains to me.

As being specific to my wants. I want my jeep to run better. Lol. I am a firefighter here in BC and so I work on my jeep on my days off.

I will try to get a couple pictures of the engine and maybe you can get a better idea of what is going on. As for me, I will keep reading and learning to see if I can get my baby up and running smoothly again
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Friday, July 8th, 2011 AT 4:39 AM
Tiny
CJ MEDEVAC
  • EXPERT
Roger!

Power Brakes?

Heck give me a full description!

It only takes a few vacuum lines to make it run beautifully!

Being so old (but so elegant still!) And having been screwed with over the years, the emissions stuff, most likely is useless and a burden, as far as extra unneeded factors in the equation.

We'll get you bare minimum, and running well!

If you like, you can make your engine EZ to see like mine.

That is also a plus. Efficient burning, also cuts out on pollution.

We will begin surgery, when you are ready!

Keep asking questions

Thank you for responding!

The Medic
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Friday, July 8th, 2011 AT 4:51 AM
Tiny
CJ MEDEVAC
  • EXPERT
See anything usable?

Think Imma babbling idiot!

Are you able and have the tools to do this stuff?

The Medic
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Saturday, July 9th, 2011 AT 3:43 PM
Tiny
IRWIN93
  • MEMBER
I haven't been able to take any pictures yet. I do have the tools available for the most part I think. Anything else I can pick up if needed. The Jeep runs great until it gets to operating temp. Then the stalling happens. I will try to get the pics to you this week and you can take a look and see if it is a big mess or just needs some medic lovin. I am going to try to tweak the carb a bit and see if this helps. I will keep you posted
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Saturday, July 9th, 2011 AT 10:13 PM
Tiny
CJ MEDEVAC
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Without your pics. And little to do on my end

Do you have the correct fuel filter. Set up like mine, top, small n. Ipple returning to the fuel tank. The extra stuff on mine, in the pic, is not a must.I have rerouted my lines for looks and to be user friendly.

In the second pic, my neighbors Jeep, with a BBD carb, shows the Bowl vents. When I still had a BBD on mine, I put a "useless", clear fuel filter on it, so that it could breathe and keep trash out. It used to run to the canister.I installed my filter, where he is pointing

Since I have no canister, my fuel tank vent (the green hose), was dangling.
I added fuel line to it and got it up as high as I could. Now mounted on the firewall with a Fuel filter vent installed on it too. Around here, "Dirt Daubers" will plug every hole they can find, with their mud nest!

Are either of these vents Plugged or capped off on yours. Needs to breathe!

The Medic
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Sunday, July 10th, 2011 AT 2:17 AM
Tiny
CJ MEDEVAC
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Read this one too!

http://www.2carpros.com/questions/1981-jeep-cj7-lack-of-power

The Medic
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Sunday, July 10th, 2011 AT 2:37 AM
Tiny
CJ MEDEVAC
  • EXPERT
Sent you a message

Home Page--Click on you--look on the left side of the page.

The Medic
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Sunday, July 10th, 2011 AT 6:55 PM
Tiny
WMBNC
  • MEMBER
A friend had the same issue. Did all the wires, filters etc. Turned out to be a bad gas tank. Rust and debris gets shaken around while driving clogging the filter inside the tank. Replace the tank, issue was gone.

Wmb.
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Thursday, August 18th, 2011 AT 10:49 PM
Tiny
CJ MEDEVAC
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HOW ARE WE COMING ALONG?

THE MEDIC
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Thursday, October 6th, 2011 AT 3:20 AM

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