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Home >> Ford >> 1988 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Operation >> 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.