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Home >> Ford >> 1990 >> Bronco II 4WD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Thermostatic Air Cleaner >> Vacuum Check Valve

Vacuum Check Valve

Apply 16 in. Hg of vacuum to CHECK side of valve and trap. If vacuum remains above 15 in. Hg for 10 seconds, valve is good.

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