2000-2002 Dodge 5.9 L VP44028X Electronic Fuel Injection Pump (245HP) Dodge 5.9 L VP44 Electronic Fuel Injection Pump for 2000 - 2002 trucks with 6-speed Manual transmissions.  

 

 VP44 Pump General Information :

The fuel injection pump (VP44) is an electronic rotary distributor pump. The pump performs four basic functions: Producing the high fuel pressure required for injection Metering the exact amount of fuel for each injection cycle Distributing the high-pressure, metered fuel to each cylinder at the precise time Varying the timing relative to engine speed. A cam ring with three plungers, a rotor, and an electronically controlled fueling solenoid valve is used to develop and distribute the high pressure required for injection. A worn or damaged internal transfer pump, plunger, or fueling valve can affect the pressure and amount of fuel injected, thus reducing the power from the engine. Generally, if the fuel injection pump is injecting fuel from one outlet, it will deliver from all outlets. VP44 Timing Principles Timing in the VP44 is controlled by an internal timing piston coupled to a cam ring inside the pump. The timing piston is moved by fuel pressure. The amount of fuel pressure in the timing piston assembly housing is controlled by an internal transfer pump and a pulsating timing solenoid valve. As pump speed increases, the fuel pressure to the timing piston assembly also increases. Based on the inputs from the fuel pump control module (FPCM), the timing solenoid valve pulses to vary the pressure to move the timing piston, which results in the cam ring moving to the desired position to achieve the commanded timing. The more pressure created by the internal transfer pump and timing solenoid valve, the more the timing will advance; therefore, timing range capability is increased at higher rpms.



Knowledge Base: Bosch VP44 Info & Installation Fuel Injection Pumps for Cummins 5.9L