Crankshaft Fluctuation Sensor: Description and Operation

Misfire Sensor And Pulse Ring:

The Misfire Sensor is an electromagnetic inductance coil similar in operation to a camshaft or crankshaft position sensor. A four-point stator, or pulse ring, located behind the crankshaft damper generates an electrical impulse in the sensor at each 90 degrees of rotation. The Powertrain Control Module (PCM) monitors the sensor pulses and flags any misfire events. When a specified number of misfires occur within a certain time frame, the PCM will alert the driver to the condition by turning on the Malfunction Indicator Light (MIL).

NOTE: Misfire sensor is not required on 49 State/Canada 7.5L engine.