Basic Ignition System
DESCRIPTIONThe distributor ignition system includes the distributor, hall effect switch (camshaft position sensor), ignition coil, secondary wires, spark plugs, knock sensor and crankshaft position sensor. The ignition system is controlled by the Vehicle Control Module (VCM). The VCM monitors information from various engine sensors, computes the desired spark timing and controls the dwell and firing of the ignition coil via an ignition control line to the coil driver.
OPERATION
The distributor connects the ignition coil and spark plugs through secondary wires. The rotor directs the spark to the appropriate cylinder. The distributor has an internal camshaft position sensor that connects to the VCM through the primary engine harness and provides cylinder identification.