Early Fuel Evaporation (EFE) Heater

Early Fuel Evaporation (EFE) Heater:

The Early Fuel Evaporation (EFE) system provides rapid heating of the air/fuel mixture during cold start conditions. Rapid heating of the air/fuel mixture provides quick fuel evaporation and more uniform fuel distribution. Rapid heating of the air/fuel mixture improves cold driveability. The EFE system also reduces the length of time the engine is in open loop. Reducing the open loop operation time helps lower exhaust emission levels. The EFE system consists of the following components:
^ The EFE Heater (Positive Temperature Coefficient heater)
^ The EFE Heater Relay

The EFE heater is located between the throttle body fuel injection unit and the intake manifold. The EFE heater relay is mounted in the relay box.