How the Ignition System Works

Any kind of fire requires three things: fuel, air, and an ignition source. With the exception of electric vehicles and diesel engines, most engines use a spark to ignite the fuel and air inside the engine.

The ignition system in your car is designed to ignite the air-and-fuel mixture at the right time, when the engine has compressed the mixture and it is ready to explode and drive the engine in a rotating motion. To do this, it uses a high-voltage spark that is timed to the engine through the computer or, in older cars, through a mechanical device called a distributor.

000.jpg

Spark Plug Spark plugs generate the spark ...

Get Auto Repair and Maintenance now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.