What is the purpose of the small secondary fuel line that goes into the bottom of the pump?? Can i block it off when using an after market high capacity pump? Should i plug it off leave it open? I rhought it is part of an emissions piece
-
-
Re: 71 Bb Fuel Lines
By '71, tanks used SEALED gas caps. The secondary line from the pump back to the tank is there for pressure relief... -
Re: 71 Bb Fuel Lines
Jeff-----
It's a fuel return line. Among other things, it helps prevent vapor lock. You can eliminate it if you use a fuel pump that has no provisions for it. You should cap off the line if you use a pump without the feature.
Actually, though, my recommendation would be to use a stock type fuel pump and leave the fuel return line connected. For a STREET application, I wouldn't try to re-engineer the fuel system.In Appreciation of John HinckleyComment
Comment