Ignition System Modes of Operation

There is only one mode of operation in this ignition system. The PCM sends timing signals to the IC module. The IC module will then amplify and send a signal to the ignition coil which will produce high voltage secondary energy. This high tension voltage will then be distributed through the coil high tension wire, distributor rotor, cap, and plug wires. Since the distributor has no influence on the base timing, adjusting the distributor will not change the base timing. However, the distributor on V8 applications can be adjusted to eliminate the chance of crossfire at the distributor wire terminals. Distributor terminal crossfire may cause poor performance. The V6 engine applications do not use an adjustable distributor.