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Home >> GMC >> 1997 >> Forward Control 6.5 F >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 6.5L Diesel (P Series) >> Computerized Engine Controls >> Input Devices >> Injection Pump Cam Signal

Injection Pump Cam Signal

The injection pump cam signal is an optical sensor and is mounted on the fuel injection pump. The sensor receives a 5-volt reference signal and allows the PCM to measure fuel injector pulse ring RPM and position. This signal is critical to accurate fuel injection timing and start of injection.

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