[30 Closed Cab PU]

I have no idea what that is. From factory the shutoff valve feeds the sediment bowl on the firewall, and then onto the carb.


How is gas getting to the sediment bowl?


The line from the shutoff to the intake manifold pretty much bypasses the carb, kinda like spraying gas or quick-start into the carb air intake.


Maybe it was hard starting in the winter, so they added an additional line into the intake manifold to prime the intake manifold? Dunno. While starting or running pouring raw gas into the intake manifold does not seem to be a good idea.