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Home >> Saab >> 2001 >> 9-3 Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Ignition System >> Timing Control Systems >> Advance Components

Advance Components

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Timing advance is controlled by the ECM. Trionic engine management system uses spark plugs to measure combustion chamber resistance, which is in turn used to control ignition timing, turbo charge and throttle position.