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Home >> Dodge and Ram >> 1989 >> Caravan Base, 2.5 J, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Emission Control System Description >> Operation >> Electronic Spark & Fuel Control

Electronic Spark & Fuel Control

All models have systems which electronically control the air/fuel ratio and ignition timing. These functions are controlled by the Single Module Engine Controller (SMEC). The system can adjust air/fuel mixture according to different modes of engine operation.

During closed loop operation, the computer continuously monitors and maintains air/fuel mixture close to the ideal ratio of 14.7:1. For additional information, see appropriate article in the COMPUTERIZED ENGINE CONTROLS section.