Dodge Nitro. Manual — part 674

Courtesy of CHRYSLER LLC

10. Remove fuel injection pump mounting nuts (2).

11. Slide pump rearward from mounting studs.

INSTALLATION

FUEL INJECTION PUMP

Fig. 73: Identifying Fuel Injection Pump & Fuel Quantity Solenoid
Courtesy of CHRYSLER LLC

1 - FUEL INJECTION PUMP
2 - FUEL QUANTITY SOLENOID

CAUTION: Cleanliness cannot be overemphasized when handling or replacing diesel

fuel system components. This especially includes the fuel injectors, high-
pressure fuel lines and fuel injection pump. Very tight tolerances are used
with these parts. Dirt contamination could cause rapid part wear and
possible plugging of fuel injector nozzle tip holes. This in turn could lead
to possible engine misfire. Always wash/clean any fuel system component
thoroughly before disassembly and then air dry. Cap or cover any open
part after disassembly. Before assembly, examine each part for dirt,
grease or other contaminants and clean if necessary. When installing new
parts, lubricate them with clean engine oil or clean diesel fuel only.

1 - FUEL INJECTION PUMP
2 - FUEL QUANTITY SOLENOID

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

1. Slip pump (1) over mounting studs.

2. Be sure pump is fully seated before tightening mounting nuts. Tighten injection pump mounting nuts

(2) to 24 N.m (18 ft. lbs.) torque.

Fig. 74: Identifying Injection Pump Sprocket Mounting Nut & Sprocket
Courtesy of CHRYSLER LLC

3. Position sprocket (1) to pump shaft and install nut (2) finger tight.

Fig. 75: Identifying High-Pressure Fuel Sensor, Electrical Connector & Fuel Lines
Courtesy of CHRYSLER LLC

4. Install banjo bolt for fuel line (4) at rear of injection pump. Tighten bolt to 28 N.m (20 ft. lbs.) torque.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

5. Install fuel line (2) and fitting to rear of injection pump. Tighten fitting to 28 N.m (20 ft. lbs.) torque.

6. Connect electrical connector to high-pressure fuel sensor (1).

Fig. 76: Fuel Injection Pump Timing Marks
Courtesy of CHRYSLER LLC

7. Tighten injection pump sprocket nut (4) to 88 N.m (65 ft. lbs.) torque.

8. PUMP ALIGNMENT MARKS: Rotate pump gear (1) until marks (2) and (3) are aligned.

9. Install timing belt.

10. Connect engine coolant hose near rear of injection pump.

11. Fill engine cooling system. Refer to COOLING article.

12. Lower vehicle.

13. Connect negative battery cable.

14. Start engine and check for fuel leaks.

PUMP-FUEL TRANSFER

DESCRIPTION

FUEL TRANSFER (LIFT) PUMP

The fuel transfer pump (fuel lift pump) is part of the fuel pump module. The fuel pump module is located in the
fuel tank. The 12-volt electric pump is operated and controlled by the Engine Control Module (ECM).

REMOVAL

FUEL TRANSFER PUMP

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

The fuel transfer pump (fuel lift pump) is a part of the fuel tank module. It is not serviced separately. Refer to
Fuel Tank Module Removal or Installation for procedures.

SENSOR-FUEL PRESSURE

DESCRIPTION

FUEL PRESSURE SENSOR

Fig. 77: Exploded View Of Fuel Rail - 2.8L Diesel
Courtesy of CHRYSLER LLC

The fuel rail pressure sensor (1) screws into the fuel rail (2) at the top of the engine. The ECM uses this sensor
to monitor the fuel rail pressure.

OPERATION

WARNING:

High - pressure fuel line deliver diesel fuel under extreme pressure from
the injection pump to the fuel injectors. This may be as high as 1600 bar
(23,200 psi). Use extreme caution when inspecting for high - pressure fuel
leaks. Fuel under this amount of pressure can penetrate skin causing
personal injury or death. Inspect for high - pressure leaks with a sheet of
cardboard. Wear safety goggles and adequate protective clothing when
servicing fuel system.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro