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Home >> Ford >> 1990 >> Probe LX, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EEC-IV >> Variable Induction Systems Check >> Intake Air Valve Diaphragms
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Intake Air Valve Diaphragms

With engine off, disconnect vacuum lines from both intake air valves. Apply 10 in. Hg vacuum to each intake air valves. Replace air valves if they will not hold vacuum.