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Home >> GMC >> 1986 >> Safari Van M V6-262 4.3L >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Early Fuel Evaporation ( EFE ) >> Description and Operation >> System Description

System Description


The EFE system provides a means of rapidly heating the induction system during cold engine operation. Rapid heating improves fuel vaporization, which in turn improves mixture distribution and reduces the length of time that carburetor choking is required. Two types of EFE systems are used, the vacuum servo type and the electrically heated type