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Where does the coil fire from - Mitsubishi Cars & Trucks

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Here's (sort of) how it works: the coil gets a constant low voltage (12 volts or less) signal from the ignition switch to the coil's primary wiring.. The computer tells the ignition module when to interrupt the ground source for the primary windings. When ground is interrupted, the primary winding's electromagnetic field is collapsed, thereby inducing high voltage in the coil's secondary wiring or windings (much higher voltage due to many more secondary wire's windings than the primary windings). The coil's secondary winding (or wire) is directly tied to the coil tower's big wire that delivers high voltage to the distributor cap and on through the rotor to the spark plug wire and then to the spark plug.
Are you more confused, or did my explanation help? The coil is the key to produce high voltage to jump the sparkplug gap with a spark. The trick is to wrap the inside wiring around an iron core or rod (thus the term windings), and when current is passed through the wire it creates an electromagnetic field which has a strong (strange?) effect on the coil's secondary wiring, or windings.
Look at it this way: Anybody can explain it (I just did), but how many of us truly understand electromagnetic theory?To me, it's a magic black box, lol.

Posted on Feb 08, 2012

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