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Home >> Mercury >> 1981 >> Lynx LS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> THERMACTOR Systems >> Testing >> Air Supply Control Valves >> Air Control/Shut-Off Valve with Orifice

Air Control/Shut-Off Valve with Orifice

Verify air flow at valve inlet and disconnect vacuum line at nipple. Disconnect air supply hose at valve outlet. With engine running at 1500 RPM, some air flow should be heard and felt at valve outlet. Connect direct manifold vacuum to vacuum nipple. A noticeable air flow should be detected when vacuum is applied.

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