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Home >> Audi >> 1987 >> 5000 CS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Digital Control System - Turbo & QUATTRO >> Operation >> Ignition Control >> Engine RPM Speed Sensor
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Engine RPM Speed Sensor

An engine RPM speed sensor, located in the upper part of bell housing, detects movement of ring gear teeth on the flywheel. This signal is used to determine engine RPM and ignition timing point.