System Description

The ignition system includes a battery, a distributor, an ignition switch, spark plugs, and primary and secondary wiring.

The High Energy Ignition (HEI) system controls fuel combustion by providing a spark to ignite the compressed air/fuel mixture at the correct time. To provide improved engine performance, fuel economy, and control of exhaust emissions, the ECM controls distributor spark advance (timing) with the Electronic Spark Timing (EST) system. The system is also equipped with electronic spark control (ESC) that will retard ignition timing if engine knock is detected.