Question about 1999 Dodge Durango

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Trying to figure out what the name of a part is

It has a plug wire coming from it to the distributor

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That would be the ignition coil, the part that creates spark at the spark plug. If you follow the electrical path from the coil wire to the distributor cap, and from there, the spinning rotor just under the distributor cap carries the path from the coil wire at the cap's center to the spark plug wires around the dist. cap, and through the plug wire to the spark plug.
The high voltage causing the spark is created in the ignition coil by the engine computer at the precise right moment signaling an ignition module to cut 12 volts current to the ignition coil. This causes the coil to internally build up high voltage which is passed through the coil to distributor cap wire. The computer knows the precise right moment to initiate spark from engine sensors, primarily the crank position sensor and the cam position sensor.

Posted on Nov 07, 2012


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