Firebird V8-305 5.0L VIN E (1992)
Knock Sensor: Testing and Inspection
ESC Check
CIRCUIT DESCRIPTION:
Electronic Spark Control (ESC) is accomplished with a module that sends a voltage signal to the ECM. As the sensor detects engine knock, the voltage
from the ESC module to the ECM is reduced. This signals the ECM to retard the timing, if engine speed is over approximately 900 rpm.
