RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN 7 (2001)
Fuel Injector: Description and Operation
Fig. 10 Fuel Injector Location
Six individual, high-pressure fuel injectors are used. The injectors are vertically mounted (Fig. 10) into a bored hole in the top of the cylinder head. This
bored hole is located between the intake/exhaust valves.
High-pressure fuel is supplied from the injection pump, through a high-pressure fuel line, through a steel connector and into the fuel injector. When fuel
pressure rises to approximately 31,026 kPa (4,500 psi), the needle valve spring tension is overcome. The needle valve rises and fuel flows through the
spray holes in the nozzle tip into the combustion chamber. The pressure required to lift the needle valve is the nozzle opening pressure. This is
sometimes referred to as the "pop,, pressure setting.
Fig. 11 Fuel Injector Connections
Each fuel injector is connected to each high-pressure fuel line with a steel connector (Fig. 11). This steel connector is positioned into the cylinder head
and sealed with an O-ring. The connectors are sealed to the high-pressure fuel lines with fittings (Fig. 11). The ferrule (Fig. 11) on the end of the
