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Home >> Mazda >> 1971 >> 1200 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> MAZDA Air Injection System (Piston Engines) >> Operation >> Coasting Richer Device
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Coasting Richer Device

With carburetors used on 1200 and 616 models, when decelerating, mixture will be too lean to burn and air injection system will not reduce these unburned hydrocarbons. As a result, this device supplies additional fuel only when decelerating. Coasting richer device is controlled by a combination of a speed switch, accelerator switch and on manual transmission cars only, and a clutch switch. When all switches are ON, by-pass passage is opened, allowing a richer mixture to be produced. Device only operates when accelerator pedal is released above a certain speed and on models so equipped, when clutch is engaged.