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Home >> Opel >> 1976 >> Opel Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Emissions System - Exhaust Gas RECIRCULATION >> Operation >> Vacuum Control Valve

Vacuum Control Valve

Used only on some Federal models, this valve is mounted in line between an intake manifold vacuum source and vacuum line of EGR system. When intake manifold vacuum exceeds 13-14 in. Hg, this valve will bleed off excess vacuum.