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Home >> Porsche >> 1983 >> 944 Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> DME Digital Engine Control >> Operation >> Data Sensors >> Auxiliary Air Valve
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Auxiliary Air Valve

Auxiliary air valve provides additional air during cold engine starts and warm-up. It is located next to throttle body. The valve consists of an electrically heated bi-metel strip, movable disc and air by-pass channel. The heater coil on the bi-metel strip is energized by the fuel pump relay.

Control of the valve is based upon engine temperature. The air by-pass channel is open when engine is cold and gradually closes as temperature rises. At predetermined temperatures, air by-pass channel is blocked and additional air flow stops.

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