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Home >> Geo >> 1992 >> Tracker Base, RWD >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Engine Start Signal (Metro, Prizm & Tracker)
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Engine Start Signal (Metro, Prizm & Tracker)

Engine start signal, sent from starter circuit, is used by ECM to determine when engine is cranking. Using this signal, ECM calculates fuel injection timing, idle speed control and throttle opener control (Tracker).

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