Electronic Ignition (1.9L): Notes

The electronic ignition system on both Single Overhead Cam (SOHC) and Dual Overhead Cam (DOHC) engines provides spark energy to ignite the air/fuel mixture necessary for combustion. The Powertrain Control Module (PCM) controls spark under all engine running conditions. The system components include: the PCM, Electronic Ignition (EI) module/coil pack, spark plugs, spark plug wires and knock sensor. The spark dwell (On-time) and degrees of spark advance are dependent upon engine speed, Manifold Absolute Pressure (MAP), and Engine Coolant Temperature (ECT). The PCM can vary spark advance from 39 degrees BTDC to 3 degrees ATDC under all engine running conditions when no spark knock is present. The electronic ignition system on both SOHC and DOHC engines provides spark energy to ignite the air/fuel mixture necessary for combustion. The PCM controls spark under all engine running conditions. The system components include: the PCM, Electronic Ignition (EI) module/coil pack, spark plugs, spark plug wires and knock sensor. The spark dwell (On-time) and degrees of spark advance are dependent upon engine speed, MAP, and ECT. The PCM can vary spark advance from 39 degrees BTDC to 3 degrees ATDC under all engine running conditions when no spark knock is present.