ford Workshop Repair Guides

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Catalytic Converter > < Vacuum Check Valve, AIR|Description and Operation

Tempo L4-140 2.3L HSC (1986)

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Vacuum Check Valve: Testing and Inspection

Apply 54 kPa (16 in. Hg.) vacuum to "check" side of valve and trap. If vacuum remains above 50.6 kPa (15 in. Hg.) for 10 seconds, the valve is
acceptable.

Catalytic Converter > < Vacuum Check Valve, AIR|Description and Operation