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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 46 (Engine Controls - Theory & Operation - 5.2L Gasoline) >> Computerized Engine Controls >> Input Devices >> Optical Distributor

Optical Distributor

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

Optical distributor provides engine speed and crankshaft position signals. The pick-up unit operates by detecting light passing through a rotating ring. PCM uses this information to control fuel injection, ignition timing and idle speed. For more information, See IGNITION SYSTEM  .

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