FixVault

Orifice Valve

On all vehicles, liquid fuel is prevented from entering vapor lines by restricted orifices. Orifices usually are a .050" (1.27 mm) orifice valve, located in emission control valve in fuel tank dome.

Fig 1: Evaporation Emission Control System (F150/250 Reg. Cab Shown; Others Similar) Canister must be at lowest point in system.
G8746