Sequential Multi-Port Fuel Injection (SFI)
The fuel charging and controls system consists of the:
The fuel charging and controls system is:
Fuel is metered into each intake port in a sequential firing order. Fuel injectors pulse to follow engine firing order, in accordance with engine demand on a tuned intake manifold.
The basic fuel requirement of the engine is determined from the data supplied to the PCM by the MAF sensor, which measures the amount of air being drawn into the engine.
The various sensors detect any changes in the operating conditions and send signals to the PCM. This permits the PCM to control the opening duration (pulse width) of the fuel injectors and maintain optimum exhaust emission control and engine performance for all operating conditions.
Throttle Body (TB)
The TB :
Fuel Injectors
The fuel injectors:
Fuel Rail
The fuel rail:
Ford Focus Brake Shift Interlock Override
NOTE: If it is necessary to use the brake shift interlock override
procedure to move the selector lever out of the PARK position, it is possible that
a fuse has blown and the brake lights are not operational. Before driving the vehicle,
verify that the brake lights are working.
This vehicl ...