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Home >> Ford >> 1987 >> Bronco 5.8 H >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Description >> Orifice Valve

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: Ford Evaporation Emission Control System (F150/250 Regular Cab Shown, Others Similar) Canister must be at lowest point in system. Courtesy of Ford Motor Co.
G8746