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Home >> GMC >> 1989 >> Magnavan 5.7 K, 400/M40 >> Repair and Diagnosis >> Engine Performance >> System >> Early Fuel Evaporation System >> Description
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Early Fuel Evaporation System: Description

Early Fuel Evaporation (EFE) system is used to provide heat to engine induction system during cold driveaway. The EFE system is vacuum operated exhaust heat riser valve type. The EFE system provides rapid heating, resulting in faster fuel evaporation and more uniform fuel distributor.