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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Engine Controls - Theory & Operation - 3.3L Gasoline) >> Ignition System >> Ignition Timing Control System >> Ignition Timing Advance Control

Ignition Timing Advance Control

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. However, it is still accessible from the selected car via links, so may be relevant.

Amount of spark advance or retard is determined by inputs that PCM receives from coolant temperature, engine vacuum and engine RPM. During engine operation, PCM can supply an infinite number of advance curves to ensure proper engine operation.

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