72 Avanti has a line coming from the fuel line drain tee.

[Jim S]

My 72 has a line coming from the fuel line drain tee on the frame.  It goes up and ends on the passenger side of the engine.  I had to plug it or else fuel comes running out.  Where is this thing supposed to go? Or should it not even supposed to be there.  I thought the tee on the frame was supposed to have a plug in it to drain fuel if needed.

[AD]

The T-fitting on the frame should have a pipe plug in the bottom of it, which can be removed for draining the tank. 

On the passenger side of the engine, there should be three lines at the fuel filter: 

- one line going into the filter

-one going from the filter to the carb

-one smaller line going from the filter back to the tank. 

Is it perhaps this smaller return line you're looking at? Sometime in the past someone may have made a "modification" that you may need to undo. 

[Jim S]

This is the Chevy motor we are taking about now.  It has a  Quadrajet carburetor with the internal fuel filter.  There's only one line from the fuel pump to the carb.  So I don't see where a return line would connect?

 

Edited 57 minutes ago by Jim S