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Home >> Volvo >> 1998 >> S70 GLT >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Ignition System >> Ignition Timing Control >> Knock Sensor
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Knock Sensor

Models have 2 knock sensors. Knock sensors are fitted to cylinder block to sense detonation inside cylinders. When detonation is detected, ECM retards ignition timing in each cylinder individually until knocking stops.