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Home >> Plymouth >> 1993 >> Colt GL, 2D Coupe, Standard, F5M21 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Engine Speed (Tach Signal)

Engine Speed (Tach Signal)

ECM uses ignition coil tach signal to determine engine speed.

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