It starts with the ignition coil that supplies 10,000 volts of high voltage to the spark plug and then creates the necessary spark between the electrode distance. This spark is necessary for ignition as soon as the gasoline-air mixture is pressed into the cylinder. This spark also ensures combustion in the cylinder. There are different types of spark plugs in different sizes. The spark plugs also have different types of heat and of course there are different brands available on the market.