Fuel tank vent problems

[hotrod52]

I have a 67 Chevelle with an LS2 in it. I have a Rock Valley stainless tank with the Walbro internal fule pump and I have problems with fuel coming out the tank vent. When I first got the car running I used the factory vent tube that goes up into the trunk and I thought that might be the problem so I bought as small breather from O'Reilly and put it above the tank, but I still have the same problem. The puzzeling thing is it normally does when the tank is about 3/4 full. It's like something is pressurizing the tank to force the fuel out the vent. I have Russell braided fuels lines from the tank the engine for my main feed and return. Has anyone had similar issues with a setup like this?

[BayouSS]

Sounds like you need a John Parson's fuel tank vent/baffle.

https://www.pro-touring.com/showthread.php?68791-Fuel-Tank-Vent&highlight=gas+tank+vent

[ErikLS2]

John's vent system is a neat, easy solution. I plan on using a small charcoal canister connected to the vent tube on my Rick's tank and then a vacuum line from that to the purge solenoid on my LS2. Has no effect on performance, no smell and kind to the environment.

[parsonsj]

Sounds like you need a John Parson's fuel tank vent/baffle.Thanks Bill! I've got 'em in stock, ready to ship.

[hotrod52]

I have a single vent tube on my tank, will this system work and how do I get in touch with John to get more details and buy one?

[parsonsj]

Hotrod,

Just drop me a PM, and we can take it from there.