Spark plugs are an essential part of a car's ignition system. As the name suggests, they provide a spark of electricity that ignites the fuel and air mixture, and gets the engine up and running.

A mechanic holding four old, used spark plugs with a gloved hand - Trigub/Shutterstock Spark plugs play a key role in igniting the air-fuel mixture that enables the engine to transition from cranking ...

Spark plugs play a key role in igniting the air-fuel mixture that enables the engine to transition from cranking to running on its own. Considering the relatively lengthy service life of these small ...