Adjusting ignition timing and knock sensor of the KE-Motronic system (Audi 100 C4)

In this case, ignition and knock sensor adjustment is performed via the diagnostic system memory. There are no other control options. Sometimes a faulty knock sensor gives itself away by frequent engine ringing during acceleration.

When installing a new sensor, be sure to pay attention to the correct tightening torque of the mounting bolt (15-25 Nm).

Some models have two knock sensors. The left sensor (2) with the mounting bolt (1) is visible in the picture. The tightening torque of this bolt must be strictly observed, otherwise the knock sensor will not work.