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Unread 07-03-2010, 05:56 PM   #1
MoC
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1986 CJ7 
 
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Vapor Lock

I think I am experiencing a vapor lock issue with my 258 and 2100. I have always had a cheap-o clear plastic advanced fuel filter that does not have the vapor return line. I have been noticing hard starts once it is warmed up. Starts fine when it is cold. I also can see bubbles in the clear filter when I turn it off. I am going back to the factory filter. Can someone tell me where the vapor return line connects to on the canister? There may be a better term for it but vapor return was all I could think of.

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Unread 07-03-2010, 06:31 PM   #2
mcmud
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1983 CJ8 
 
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The fuel return line is continuous to the tank, not connected to the vapor canister. There should be a hard line running along the left side frame rail and ending very near the canister. If it is open I suggest that it is cleaned out prior to using it. You will find that a rubber hose is connected to it at the aft end and that is where I would cut and allow access for cleaning it. Once you make that connection be sure to watch for leaks.

If the first section of the return line which runs near to the filter and then avoiding the intake/exhaust manifolds is missing you should bend a new one.

The air bubbles that you see are a common occurrence with each pulse of the pump. That is the reasoning of the dual output filter's orientation with the return in on top of the carb fill line.
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Unread 07-03-2010, 08:00 PM   #3
MoC
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Anyone have a picture of the line where it ends by the canister? Just went and looked and did not see it, but it was a little dark.
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Unread 07-03-2010, 08:05 PM   #4
dslywalker
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[IMG][/IMG]
I got them but can'y seem to to be able to post them
http://www.jeepforum.com/forum/f8/fu...ister-1062753/
If you look at post #1 that where it goes

Last edited by dslywalker; 07-03-2010 at 08:09 PM.. Reason: more info
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Unread 07-04-2010, 01:57 PM   #5
MoC
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Alright found the line and got the correct filter installed. The PO had pulled it and stuck it on the PVC port of the cannister. Getting ready to go for a ride and see what happens.
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Unread 07-04-2010, 02:02 PM   #6
mcmud
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MoC I hope that you did locate the correct line.

It will be running along the frame rail with that line that has been wrongly identified above.

That line in the referenced photo is the fuel tank vent line, not to be confused with the fuel return line.
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Unread 07-04-2010, 03:25 PM   #7
MoC
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Yes sir got the correct one. The fuel tank vent is green and still connected. Thanks for checking! Problem solved by the way. Ran around town for 2 hours working on the honey do list and started right up each time.
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