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Signal Rotor/Camshaft Position (CMP) Sensor

Measure signal rotor/CMP sensor air gap. If gap is not .008-.016" (.20-.40 mm), adjust or replace distributor. Check signal rotor/CMP resistance. See I - SYS/COMP TESTS article in the ENGINE PERFORMANCE Section.

Fig 1: Identifying Noise/Filter Condenser Connector Terminals
G91H16359Courtesy of GENERAL MOTORS CORP.