Testing and Inspection for Knock Sensor on Horizon L4-97 16L VIN A (PEUGEOT)
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Knock Sensor: Testing and Inspection
1.
Connect a suitable timing light to the engine.
2.
Start engine and increase speed to 1200 RPM.
3.
Connect a suitable vacuum pump to the vacuum transducer. Set pump to 16 inches vacuum.
4.
Tap on the manifold near the sensor. Using the timing light, check for a decrease in spark advance. The amount of decrease in timing is
proportional to the strength and frequency of the tapping. The greatest decrease in timing will be approximately 11 degrees.
