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Home >> Ford >> 1993 >> Probe Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EEC-IV >> Emission Systems & Sub-Systems >> Exhaust Gas RECIRCULATION (EGR) >> Vacuum Check Valve
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Vacuum Check Valve

Apply 16 in. Hg vacuum to check side of valve, and trap. If vacuum remains greater than 15 in. Hg for 10 seconds, valve operation is normal. If vacuum does not remain greater than 15 in. Hg for 10 seconds, replace valve.

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