Induction System
WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for burning fuel in the cylinders.
The solenoid-operated fuel injectors, mounted in the upper intake manifold, meter fuel into the air intake stream according to engine demand.
The ten fuel injectors are:
- Positioned so that their tips direct fuel just ahead of the engine intake valves.
- Connected in parallel with the fuel pressure regulator.
Fuel is supplied from the fuel tank by a high-pressure electric fuel pump mounted in the fuel tank. Fuel is filtered and sent to the fuel injection supply manifold.
A fuel pressure regulator on the fuel injection supply manifold controls the fuel delivery pressure at a constant 269 kPa (39 psi).
Excess fuel supplied by the fuel pump but not needed by the engine is returned to the vehicle fuel tank by a fuel return line.