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Carburetor for 79cj7

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Carburetor for 79cj7
J

Jmacias22

Jeeper
Posts
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Location
California
Vehicle(s)
1979 Cj7
Hello all,

I have a 79 CJ7 that I took to pass smog yesterday and it did not pass because the carburetor is not good anymore. I live in CA and I wanted to o ow if anyone can steer me in the right direction to a carb that I can put on my jeep to pass smog that won't cost me an arm and a leg (expecting our first child any day now). Thank you in advance!
 
I do not see where that you are listing what motor you have so I am going to assume the AMC 258 i6 / 4.2l inline 6 with a 2bbl, I didnt realize how expensive the rebuilt 2bbl has gotten at the parts store considering how little there is to rebuild

rebuild and adjust:
Moses Ludel's 4WD Mechanix Magazine - Rebuilding the Two-Barrel BBD Feedback Carburetor - Moses Ludel's 4WD Mechanix Magazine, HD Video Network and Forums

rebuild videos:
https://www.youtube.com/results?search_query=carter+bbd+rebuild

rebuilt:
https://www.google.com/webhp?source...5&ion=1&espv=2&ie=UTF-8#q=carter+bbd&tbm=shop
 
Jmacias22 said:
Hello all,

I have a 79 CJ7 that I took to pass smog yesterday and it did not pass because the carburetor is not good anymore.
Click to expand...
What exactly is wrong with your carb that it doesn't function as it should?
A rebuild kit is $20-$30
 
thanks for the reply! The smog machine was saying it was using too much gas. The levels on the screen were always red. So I asked the guy and he said it's the carb.
 
Gert, I thought about rebuild, but I can't do it because I really don't know what I'm doing. Some places in the town I live in charge upward of $100 an hour for a rebuild. With the cost of the labor alone I could almost buy a new one. But, I might try it!
 
What do the spark plugs look like? If there is a lot of carbon build up on them, you are running too rich. You might want to install smaller jets in addition to rebuilding.
 
The spark plugs are about two years old, I do not drive the jeep too much, I'd say maybe once a week to the store and back.
 
What engine do you have?
Rebuilding a carb is fairly easy work.
If you take a pic of the carb and post it here we can ID it.
There are many step by step videos on how to rebuild a carb.
Unless you have extra money for someone else to do it.
 
Jmacias22 said:
The spark plugs are about two years old, I do not drive the jeep too much, I'd say maybe once a week to the store and back.
Click to expand...
Age of the plugs doesn't necessarily mean anything. You have to acutally take them out and look at them.
Like Posi said, post some pictures of the carb and we will all be able to help you through it.
 
When considering the cost of a new or a replacement carb. Even a new one will need to be tuned for your engine. More money, more money ,more money........

There are only a few instances where a carb is truly worn out. The worst is a crack somewhere in the casting, cracks can't be fixed. Then there is or are worn shaft bushings where uncontrolled vacuum leaks can be extremely frustrating. Even then there are carb. shops that will replace worn shaft bushings.

If the CJ ran and passed emissions in the past and everything else in the engine is the same I'm not at all sure you suddenly have jetting problems. As others have written, you need to either rebuild or have someone else rebuild the carb. If you want to drive and enjoy your CJ, try not to go cheap here. Also, while you are at it you need to do all the other supporting stuff like checking the quality of your vacuum lines and those often problematic vacuum caps. Replace the fuel filter, air filter and ALL the supporting carb. gaskets. This is the time to do it right the very first time.

With that being said, I have been a parent, and know what a first child is all about and for the next year time and money will be difficult to find. especially if you want to keep a happy house hold. It stops being about you and your wife, life will be all about the child. As a matter of fact my Motorcycle basically fuel rotted (I.E. destroyed) in the garage and my '80 CJ5 was sold due to the driving refinements a child brought with it.
 
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Everyone so far is right... When the tester said "carb" that was a blanket answer for too much fuel. There's lots of reasons for too much fuel. Carb issue. Vacuum issue. Tuning issue. Incomplete burn. I would replace all vacuum lines with fuel lines (handles vapor better, lasts longer). If this doesn't help, it will never hurt and they'll last longer.

There's a lot of other step-by-step testing to do before you get to a carb rebuild, but if it needs done, let's ID your carb - get the appropriate rebuild kit and some carb cleaner and let this board and YouTube help you out. With a baby on the way, whatever sanity you possess is about to dissipate, so spending some time alone rebuilding a carb might be just what the doctor ordered. If you don't drop it and break it, you can't mess it up without effort and all it will need is someone to help adjust / tune.

Congrats on the upcoming birth! I wish your family all the best! :chug:

Kids are GREAT, I have 4 girls and a wife - that's 5, so I know a bit about the loss of sanity...:eek:
 
As others have already posted, my bet is it is something simple. Cracked hoses, stuck PVC valve will mess with the emissions test. Along with checking your spark plugs, they should look "Brownish", ether have someone help you or with the motor running, Jeep in park, or neutral and parking brake on, spray carb. cleaner around the base of your carb. and vacuum hoses. Carb. linkage also. If the motor speeds up you have a leak. Try spraying some carb. cleaner through the PVC valve too. Then pull the PVC valve off and see if you can blow through it. You should hear it open and close. If your Jeep passes thease simple tests, look up your carb. online and look for directions on how to adjust your carb. Pay attention to where the screws are turned before you start, and try running the Jeep for awhile and check the plugs again. A quarter turn makes a big difference. Try these simple things yourself. I bet you will fix the problem, know more about your Jeep, and feel good about your self.
 
Both of the BBD carbs that I have had had vacuum leaks around the throttle shaft. I worked in a machine shop at the time, so I took the better of the two and bushed the throttle shaft with bronze bushings. It was kind of a pain in the rear, but it did make the carb work pretty well after that.
 
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