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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Air Injection Systems >> Vacuum Reservoir
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Vacuum Reservoir

When charged with 15-20 in. Hg. of vacuum, vacuum loss should not exceed 0.5 in. Hg. in 60 seconds. If it does, replace reservoir.