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Home >> Mercury >> 1989 >> Tracer 4D Hatchback, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Theory/Operation - 4-CYL >> Computerized Engine Controls >> Input Devices (Fuel Injection) >> Map Sensor (MAP)
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Map Sensor (MAP)

Sensor provides ECA with signal reflecting barometric pressure based on manifold vacuum and manifold pressure. MAP sensor input signal affects air/fuel ratio, EGR flow, fuel shutoff on deceleration and shift indicator light.