No fuel flow?

What year model are we talkin' about here? Up through part of 70 the vent was VERY simple. Some of the 70 cars (mostly CA) and later had evap systems on the tank. If you screw up that system, you can end up without having a vent.

The early vent system could not be simpler. A simple tube going down and ending in the inside of the frame rail. VERY easy for insects to build mud nests, etc and plug that

tankvent.jpg