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Home >> Nissan-Datsun >> 1983 >> 200SX 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Intake Manifold Vacuum Control System >> Operation >> Vacuum Control Unit >> 200SX
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Vacuum Control Unit: 200SX

The vacuum control unit consists of a diaphragm and control unit. When intake manifold vacuum exceeds a pre-determined value, the diaphragm opens the control unit and allows air to by-pass throttle chamber directly into intake manifold.