Spark Your Ride: Understanding Your Car's Ignition System. The car's spark system ignites the fuel-air mixture in the engine's cylinders to power the vehicle. Key components include the spark plug, ignition coil, distributor (in older cars), and control module. The ignition coil transforms the car battery's low voltage into the high voltage needed to create a spark. The distributor directs this high voltage to the correct spark plug in older systems, while modern cars often use direct ignition w

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