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Home >> Ford >> 2003 >> Windstar Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Theory & Operation - CNG, Flex-Fuel & Gasoline >> Computerized Engine Controls >> Output Devices >> Coil Pack
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Coil Pack

A coil in a coil pack is turned on (coil charging) by PCM, and is turned off when 2 spark plugs are fired simultaneously. Spark plugs are paired so that one spark plug fires on the compression stroke and other spark plug fires on exhaust stroke. Next time coil is fired, order is reversed and next pair of spark plugs fire according to engine firing order.

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