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Unread 06-17-2013, 06:01 AM   #1
CJ51973
Registered User
1988 YJ Wrangler 
 
Join Date: Aug 2004
Location: Versailles, KY
Posts: 2,313
Cap vacuum

I seem to have a lot of vaccum when I remove my gas cap. I didn't have this issue in the past as I hade a bad vent hose on the filler neck. I fixed when I dropped the tank & fixed my rear frame last winter. I removed the hose from the charcoal canister, took out the little orfice and blew in it with the gas cap off. I don't think I was doing anything. Should I be able to blow through the vent line for tank like this? Just thought I'd ask before taking more stuff apart and using the air compressor to find the blockage. Thanks for the help!

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Unread 06-17-2013, 07:05 AM   #2
Siva283
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1995 YJ Wrangler 
 
Join Date: May 2011
Location: Falling Waters, WV
Posts: 3,698
Have you checked your rollover valve. I am pretty sure the vent at the gas cap is only for when your fueling up otherwise the gas cap seals it.
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 06-17-2013, 08:27 AM   #3
CJ51973
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1988 YJ Wrangler 
 
Join Date: Aug 2004
Location: Versailles, KY
Posts: 2,313
I am talking about making sure I am venting to the charcoal canister during normal run. When I had the bad hose I know it would get air through the cracks in it. Since I have fixed it and it is now hot I get a pretty good hiss each time I take the gas cap off for fuel.
So, I have two of these on opposite sides of the tank (see second picture). And I think this is the cross section of it (first picture). It looks like a spring holds it closed (although it is open in the cross section). So my weak lungs might not push these down. Am I wrong here?
images1.jpg

images.jpg

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