My fuel tank has 2 vent tubes comming off of it on the drivers side. Currently the way it is they are tied off together by the PO. I notice on my buddys Cj his go to a black module, then go to the evap canister.
My black module is gone but my evap canister(un hooked) is still there. Im pretty sure the tubes need to go some to vent, right?? Or is it ok to leave them capped
When i fuel up my tank lets out some pressure, when i open the gas cap.
ok thanks for the pics. Im missing the liquid check valve and rollover check valve. Only thing i have left is a capped off line going to the evap canister. Basicly all the emissions was hacked out. What would be the best way to do something with the 2 vent lines??
I don't have my jeep right now because I am overseas. If I remember right one of the vent lines should go to the evaporative cannister. You may want to look up which of the four ports (in the cannister) that line should run into. The second vent line should run to the "out" side of the fuel filter. Your fuel filter should have two ports on one side of it; one goes to the carb and the other to the vent on the gas tank. This lets the psi above the recommended 4psi (I think) run back into the gas tank so that line is not really a vent but a return line from the fuel filter.
My roll over check valve was a rusty hunk when I bought my jeep and was not hooked up and the canister up front was gone. I capped one of the tubes coming from the tank. The other tube I hooked a new piece of fuel hose to it, routed it up by the tail light and put a chevy fuel filter on it. According to legend: the fuel filter will let the tank vent properly and act as a check valve to prevent water from entering and fuel from sloshing out.
79 CJ5 4" Skyjacker
35" Dunlop MT's, 9000lb Warn
304 built with Edelbrock cam,valve springs,timing set,intake,Holley truck avenger carb, DUI ignition, fenderwell headers w/Supertrapps, Twin Sticked D20
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Just buy the check valves they do more than just stop fuel from sloshing out. A fuel filter will let it all run out when you roll it. I know there was a post on here not to long ago about the same subject.
Don't know where you can get a liquid check valve as the one I have is my original from the factory.
Do you know if the liquid check valves go bad. I am redoing my 82' CJ7 and figured I would replace it since it is so old but can not find one. I have the original jeep part number but the dealership said that is is discontinued item.
My 1976 CJ7 did not come with a factory roll over valve either, just check valve and the factory manual confirms this. However I think it is a good idea to add it just in case you do roll over, you do not want fuel spilling all over you after a wreck.
The roll over valve was added sometime after 1976.