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Home >> Lexus >> 1994 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Emission Systems & Sub-Systems >> Positive Crankcase Ventilation (PCV) >> PCV Valve
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PCV Valve

Remove PCV valve. See COMPONENT LOCATIONS  under INTRODUCTION. Inspect PCV hoses, connections and gaskets for leaks and damage. Blow air through cylinder head side of PCV valve. Air should pass freely through PCV valve. Blow air through intake manifold side of PCV valve. Air should pass freely through PCV valve. Clean or replace PCV valve if air does not flow as specified.