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Enrichment System

The enrichment system consists of a metering jet and a solenoid-operated on/off enrichment valve which provides additional fuel for main metering system. The activation of on/off valve is controlled by length of time current is supplied to solenoid. Under heavy acceleration, heavy engine loads, cold start or warm-up, additional fuel is required. ECU energizes solenoid at pre-set duty cycles as additional fuel is needed.