Firebird V8-305 5.0L VIN E TBI (1989)
Knock Sensor: Description and Operation
PFI
The knock sensor is located in the engine block and sends a signal to the ECM to retard ignition timing during a spark knock condition. When the knock
sensor senses no more knocking the ECM advances timing in small increments. This allows the ECM to maintain maximum timing advance under
various conditions.