Engine Fuel Temperature (EFT) Sensor (Discovery Series I)

The EFT sensor is located on the fuel rail and measures the fuel rail temperature rather than the fuel. EFT sensor informs ECM when fuel rail is hot. Because of fuel vaporization and possible bubbles in the fuel rail, ECM will increase injector pulse width during hot engine restarts to clear bubbles. During engine operation fuel circulation keeps fuel rail cooled. There is no default strategy for the EFT sensor. An EFT sensor fault may result in a hot engine restart problem. A fault is indicated by illumination of the MIL.