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Home >> Ford >> 1990 >> Probe GL, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - EEC-IV >> Emissions/Sub-Systems Checks - TAC Systems >> Vacuum Check Valve

Vacuum Check Valve

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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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