CJ has all vacuum lines essentially capped off - Page 3 - JeepForum.com
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post #31 of 33 Old 04-03-2010, 08:03 AM
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1979 CJ7 
Join Date: May 2009
Location: Worthington, Ky.
Posts: 11
1979 258 6cyl. 2 barrel carb.

Last edited by 79cj97tj; 04-03-2010 at 08:19 AM.
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post #32 of 33 Old 04-03-2010, 08:20 AM
Mike Romain
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1986 CJ7 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant
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Originally Posted by 79cj97tj View Post
Your links are scrambled, but I managed to view the photos.

Yours actually runs like that???

The carb float bowl vents are plugged which can starve the engine for fuel and I don't see a gas tank vent.

If the gas tank isn't vented, then it too can form a vacuum and starve the engine for fuel.

The gas tank vent was the charcoal canister and it's flow is needed by the PCV valve for the PCV to operate properly. The PCV controls engine sludge.

You could get a PCV from a 75 which didn't use an active suction canister to get the proper crankcase ventilation. They had the 3 hole canisters that vented into the air filter snout.

Your distributor also looks like it may be using manifold vacuum instead of the nipple on the valve cover side which is a ported nipple.

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post #33 of 33 Old 04-03-2010, 09:13 AM
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1979 CJ7 
Join Date: May 2009
Location: Worthington, Ky.
Posts: 11
Hey Mike, I went out and took the bowl vent cap off. The distributor line goes down to the side off the block. Thats where it was when i did this. Its in the haynes manual going there. I havent had any gas tank vaccum issues yet.The gas tank vaccum line is still there just not hooked up to anything. But like i said it runs good. Idles great, timings good. Plenty of power. I thought about the bowl vent when i did that. Thanks for mentioning it. By the way im new to this photobucket stuff. Took me an hour to do those three pics. My wife said i wasnt hitting enter. Oh well. Thanks for bringing this stuff to my attention though. Im not a very good mechanic, just thankful its a 79. lol
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1984 , 258 inline 6 , cj7 , vacuum lines

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