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Heated Air Intake System - CARBURETED Models: Testing: Tr7
- Disconnect vacuum line and apply a minimum of 9 in Hg. Flap should move to fully closed (hot) position. Remove vacuum, flap should return to fully open (cold) position.
- Disconnect sensor vacuum supply line and apply a minimum of 9 in. Hg vacuum to sensor. Flap valve should move to closed position and hold until vacuum is released.
- Apply 9 in. Hg vacuum to one-way check valve. Flap valve should close and hold closed for 20 seconds after vacuum is released.