Fuel Cooling - Transit: Notes
WARNING: This page is about a different car, the 2020 Ford F-550 Super Duty, 2020 Ford F-450 Super Duty, 2020 Ford F-350 Super Duty, 2020 Ford F-250 Super Duty, and 2020 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
Fuel cooling is required to maintain an acceptable fuel temperature during engine operation. The fuel system temperature is monitored by the fuel rail temperature (FRT) sensor, which is an input to the PCM. The fuel conditioning module thermostat will passively recycle returned fuel from the engine to the inlet of the high pressure fuel injection pump during low fuel temperatures, or pass it through the fuel cooler and return it to the tank for further cooling during high fuel temperatures.