V 2500 P/U 4WD V8-350 5.7L (1987)
Knock Sensor: Description and Operation
Electronic Spark Control (ESC)
Electronic Spark Control (ESC) is used on some models. The ESC system is used in conjunction with the EST system to provide additional spark retard
during engine detonation. A knock sensor signals a separate ESC controller to retard the timing when it senses engine knock. The ESC controller signals
the ECM which reduces spark advance until no more signals are received from the knock sensor.
