Dodge Nitro. Manual — part 659

Fig. 18: Latch Clip-Type 2 Disconnect
Courtesy of CHRYSLER LLC

24. Latch Clips - Type 2: Depending on vehicle model and engine, 2 different types of safety latch clips are

used. Type-1 is tethered to fuel line and type-2 is not. A special tool will be necessary to disconnect fuel
line after latch clip is removed. The latch clip may be used on certain fuel line/fuel rail connection, or to
join fuel lines together.

25. Type 2: Separate and unlatch small arms on end of clip and swing away from fuel line.

26. Slide latch clip toward fuel rail while lifting with screwdriver.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

Fig. 19: Fuel Line Disconnection Using Special Tool
Courtesy of CHRYSLER LLC

27. Insert special fuel line removal tool (Snap-On number FIH 9055-1 or equivalent) into fuel line (1). Use

tool to release locking fingers in end of line.

28. With special tool still inserted, pull fuel line from fuel rail.

29. After disconnection, locking fingers will remain within quick-connect fitting at end of fuel line.

30. Disconnect quick-connect fitting from fuel system component being serviced.

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

Fig. 20: EVAP Can. Vapor Hose
Courtesy of CHRYSLER LLC

31. Wing Type: A special tool will not be necessary to disconnect this type of fitting (2). This line is used on

different fuel and emission components. The graphic shows the fitting used on an EVAP canister.

32. Use two fingers to push on fitting wings (2)

33. Pull and disconnect fitting while holding wings.

34. After disconnection, locking fingers will remain within quick-connect fitting.

CONNECTING

1. Inspect quick-connect fitting body and fuel system component for damage. Replace as necessary.

2. Prior to connecting quick-connect fitting to component being serviced, check condition of fitting and

component. Clean parts with a lint-free cloth. Lubricate with clean engine oil.

3. Insert quick-connect fitting into fuel tube or fuel system component until built-on stop on fuel tube or

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro

component rests against back of fitting.

4. Continue pushing until a click is felt.

5. Single-tab type fitting: Push new tab down until it locks into place in quick-connect fitting.

6. Verify a locked condition by firmly pulling on fuel tube and fitting (15-30 lbs.).

7. Latch Clip Equipped: Install latch clip (snaps into position). If latch clip will not fit, this indicates fuel

line is not properly installed to fuel rail (or other fuel line). Recheck fuel line connection.

8. Connect negative cable to battery.

9. Start engine and check for leaks.

REGULATOR-FUEL PRESSURE

DESCRIPTION

FUEL PRESSURE REGULATOR

The fuel pressure regulator is located within the fuel pump module. It is serviced by replacing the fuel pump
module assembly.

PUMP-FUEL

DESCRIPTION

FUEL PUMP

The electric fuel pump is located inside of the fuel pump module. A 12 volt, permanent magnet, electric motor
powers the fuel pump. The electric fuel pump is not a separate, serviceable component.

OPERATION

FUEL PUMP

Voltage to operate the electric pump is supplied through the fuel pump relay.

Fuel is drawn in through a filter at the bottom of the module and pushed through the electric motor gearset to
the pump outlet.

Check Valve Operation: The fuel pump module contains a one-way check valve to prevent fuel flow back into
the tank and to maintain fuel supply line pressure (engine warm) when pump is not operational. It is also used to
keep the fuel supply line full of gasoline when pump is not operational. After the vehicle has cooled down, fuel
pressure may drop to 0 psi (cold fluid contracts), but liquid gasoline will remain in fuel supply line between the
check valve and fuel injectors.Fuel pressure that has dropped to 0 psi on a cooled down vehicle (engine off)
is a normal condition.

The electric fuel pump is not a separate, serviceable component.

MODULE-FUEL PUMP

2007 Dodge Nitro R/T

2007 ENGINE Fuel System - Nitro