Distributor: Description and Operation

DISTRIBUTOR IGNITION SYSTEM
The distributor used within the ignition system consists of a signal generator (signal rotor and camshaft position [CMP] sensor) and rotor. All spark timing changes in the distributor are performed electronically by the ECM. The ECM monitors information from various engine sensors, computes desired spark timing, and signals the distributor to change the timing accordingly. No vacuum or mechanical advance mechanisms are used. The ignition system also includes a noise suppressor condenser and noise suppressor filter to eliminate ignition sound. The noise suppressor filter also provides the tachometer (if equipped) with an ignition signal.