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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) >> Ignition Switch Start Position
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Ignition Switch Start Position

Informs ECA of key position. Information is used in calculating fuel injection amounts.