E 150 V8-4.6L SOHC VIN W (2004)
Fuel Pressure Regulator: Description and Operation
Gasoline Fuel System
The fuel rail pressure (FRP) sensor (Figure 37) senses the pressure difference between the fuel rail and the intake manifold. The return fuel line to the
fuel tank has been deleted in this type of fuel system. The differential fuel/intake manifold pressure together with measured fuel temperature provides
an indication of the fuel vapors in the fuel rail. Both differential pressure and temperature feedback signals are used to control the speed of the fuel
pump. The speed of the fuel pump sustains fuel rail pressure which preserve fuel in its liquid state. The dynamic range of the fuel injectors increase
because of the higher rail pressure, which allows the injector pulse width to decrease.
Fuel System - 4.6L, 5.4L and 6.8L
Component Location - Gasoline
