EDIS ICMs respond to the rising SAPW signal generated by the PCM and fire the coil. Many PCMs incorporate software that can fire the spark plugs multiple times at idle and low rpms. This feature is commonly known as repetitive spark. If the rpm is low enough, there is sufficient time to charge the coil and fire the sparkplugs two or even three times. This repetitive spark software in the PCM can be calibrated on or off, and can be calibrated to work below a specified rpm, therefore, each vehicle application may be different. In general, most vehicle applications use this feature, fire the plugs a maximum of three times and restrict operation to 1800 rpm or less. This feature was first introduced on the 1990 Escort.
on October 13, 2007, 5:56 pm, in reply to "Ford Ka 2003, 1.3 Duratec None start"
HDR EDIS Repetitive Spark (Multi-spark)
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Ford KA - Will not start after a head gasket replacement # - Dave Hill October 12, 2007, 8:40 pm
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