Early Fuel Evaporation System: Description

The Early Fuel Evaporative (EFE) system is designed to improve the atomization of fuel entering the engine during engine warm-up. This aids in the reduction of hydrocarbon (HC) emissions during cold engine operation. The EFE system is provided with a chamber located above a manifold "stove" which is mounted between the intake and exhaust manifolds. During engine warm-up, a heat control valve in the exhaust manifold closes, routing the exhaust gases below the manifold stove to heat the air/fuel mixture before it enters the engine.