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Home >> BMW >> 1974 >> 3.0CS Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Vacuum Advance/Retard Systems >> Testing >> Vacuum Solenoid Valve
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Vacuum Solenoid Valve

Ensure that valve is open to vacuum flow when de-energized. Connect solenoid to 12-volt power source. Vacuum solenoid valve should close.

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