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Home >> Renault >> 1977 >> R12 GTL, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Fast Idle - Deceleration - Control >> Testing >> Vacuum Valve
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Vacuum Valve

Disconnect pipe between vacuum valve and throttle plate opener. Connect a vacuum gauge to outlet of vacuum valve. Start engine and bring to normal operating temperature. Open throttle, then release it. Vacuum gauge should read 21.5 in. Hg.