Electrics & Electronics: Ignition Systems Ignition components Summary The primary components of the automotive ignition system are: battery,spark plug,engine timing,distributor,spark intensifiers and high tension (HT) leads. The primary components of the automotive ignition system are: Battery Spark plug Engine timing Distributor Spark intensifiers High tension (HT) leads Battery The battery supplies the Electro-Motive Force (EMF) to the ignition circuit Autel MaxiDiag MD703. The battery needs a constant flow of air around it to keep it cool,and must be well maintained if it is to keep the ignition system functioning properly MaxiTPMS TS101 Scanner. Spark plug The spark plug creates the spark that ignites the air/fuel mixture inside the cylind ... Read more »