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Home >> Mazda >> 1985 >> 626 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Feedback Carburetor System >> Operation >> Air Control Valves

Air Control Valves

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The air control valves are part of the air injection system. They help govern flow of secondary air to reed valves in air cleaner.

The No. 1 air control valve controls flow of secondary air to reed valve "A" according to intake manifold vacuum. If also supplies air when 3-way solenoid valve is on.

The No. 2 air control valve (Federal models only) is used in conjunction with No. 1 valve to control air flow to reed valve "A". No. 2 air control valve is vacuum actuated. The vacuum signal is controlled by an ACV solenoid valve which in turn is governed by the ECU.