Fuel is drawn from the tank by a lift pump (figure 5-12) mounted on the inside of the left frame rail. The lift pump pressurizes…
Fuel pressurized at the transfer pump travels to the charging annulus. The annulus has eight slots. From the charging annulus, fuel is distributed to two…
During end of fill (figure 5-16): • the rotor inlet ports are out of alignment with the annulus slots. Fuel is prevented from entering the…
During fill (figure 5-15): • the two rotor inlet ports align with the charging annulus slots. This allows transfer pump pressure into the rotor passages.…
System Operation The electronic injection pump is the heart of the fuel control system. The rotary distributor pump uses an electromagnetic control valve to regulate…
PCM control can be divided into eight subsystems: • Fuel Control • Timing Control • Glow Plug Control • Boost Control • EGR Control •…
The Powertrain Control Module (PCM), located in the passenger compartment (figure 5-1), controls the EFI system. Internally, the PCM is programmed with calibration information specific…
Fuel Injection System Diagnosis Diagnosis of the fuel injection system includes the following diagnostic steps. INJECTION PUMP To check the fuel supply to the injection…
The fuel return system uses the following hoses and pipes (figure 4-8): • The housing pressure regulator is connected to the return system by a…
Each cylinder has an identical fuel injection nozzle mounted in the pre-combustion chamber. The nozzles are secured with threads and copper sealing gaskets to ensure…