General Information

The electronic ignition system on the 3.0L dual overhead cam (DOHC) engine provides spark energy to ignite the air/fuel mixture necessary for combustion. The Engine Control Module (ECM) controls spark under all engine-running conditions. The system components include: the ECM, two Electronic Ignition (EI) modules each which house three primary and three secondary coils, spark plug boots, spark plugs, Camshaft Position (CMP) sensor, knock sensor and associated wiring.

The spark dwell (On-time) and degrees of spark advance are dependant upon engine speed, intake airflow as indicated by the Mass Airflow Sensor (MAF) and engine coolant temperature. The ECM can vary spark advance from 50° BTDC to 30° ATDC under all engine-running conditions when no spark knock is present.