RAM 2500 Truck 2WD L6-5.9L DSL Turbo VIN C (2002)
The bottom of each fuel injector is sealed to the cylinder head with a 1.5mm thick copper shim (gasket) (Fig. 12). The correct thickness shim must
always be re-installed after removing an injector.
Fuel pressure in the injector circuit decreases after injection. The injector needle valve is immediately closed by the needle valve spring and fuel
flow into the combustion chamber is stopped. Exhaust gases are prevented from entering the injector nozzle by the needle valve.
FUEL INJECTION PUMP RELAY
The fuel injection pump relay is located in the Power Distribution Center (PDC) Refer to label under PDC cover for relay location.
The Engine Control Module (ECM) energizes the electric fuel injection pump through the fuel injection pump relay Battery voltage is applied to
the fuel injection pump relay at all times. When the key is turned ON, the relay is energized when a 12-volt signal is provided by the ECM. When
energized, 12-volts is supplied to the Fuel Pump Control Module. The Fuel Pump Control Module is located on the top of the fuel injection pump
and is non-servicable.
