The ECU controls the spark plug directly without any other components.

The HT lead carries low-voltage electricity to the battery.

The ignition coil increases the voltage from the battery to a level suitable for ignition.

Modern vehicles no longer use distributors in most systems.

Spark ignition systems are only used in diesel engines.

A worn spark plug can cause the engine to misfire.

The ignition system operates only when the engine is being started.

Diesel engines use glow plugs instead of spark plugs for ignition.

Ignition timing is crucial for engine performance and efficiency.