Fuel Tank venting / overflow?

[bigmanjbmopar]

Had some fuel on the ground at the driverside rear of the tank, looking under I see 2 lines going into the trunk. Before I replace the 3" of 5/16th line going to them can anyone tell me what these lines are for?

The fuel line to the pump is on the passenger side.

Looks like one goes up inside the trunk and has a couple of 90 degree tuns on it like a u shape then dives back out by the sending line. I would think that this is the vent line, but what is the on on the outside next to it?

 

[Finallygotmine]

Had some fuel on the ground at the driverside rear of the tank, looking under I see 2 lines going into the trunk. Before I replace the 3" of 5/16th line going to them can anyone tell me what these lines are for?

The fuel line to the pump is on the passenger side.

Looks like one goes up inside the trunk and has a couple of 90 degree tuns on it like a u shape then dives back out by the sending line. I would think that this is the vent line, but what is the on on the outside next to it?

I had the same exact set up. Yes, the line that goes into your trunk is what I was told is called the roll over vent. The other fitting on my tank was actually uncapped and loose. So I was dripping gas all over the place when I put a lot of gas in the tank. You could just cap it off. If you have the other vent and a vented gas cap, that should be plenty of venting. I took my tank to a guy and he braised a fitting in my loose fitting for my fuel injection return line line.

 

[GTXKen]

Both are vents, I used small K&N breathers and mounted them under the car rather than run lines into the trunk.

 

[rich418]

I think the rubber line is 1/4". You can order a new vent kit. The gas cap should be not vented or gas will slosh out.

http://www.jacksautoparts.com/catalog/fuel.html

 

[bigmanjbmopar]

I think that was the problem the old cap had a weak seal and it overflowed now I have a new non vented cap it it has not don't it again. Thanks for the replys good stuff from the pros!