Jeep 5142345AA Regulator-Fuel Pressure

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All wheel drive (AWD) models have a saddle fuel tank configuration and have main and auxiliary fuel pumps. Each fuel pump has a sending unit. The auxiliary fuel pump contains the fuel pump reservoir, fuel pressure regulator and fuel filter. Relieve the fuel system pressure. Disconnect the negative battery cable from the remote ground terminal or battery. Remove the rear seat cushion and fuel pump module cover. On AWD models, remove main and auxiliary fuel pump module covers. Disconnect the fuel delivery line quick-connect fitting and on 2015 and later models, also disconnect the fuel vapor line from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Disconnect the electrical connector from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Before removing the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly, make alignment marks on the assembly and the fuel tank (if marks don't already exist), to ensure the assembly will be correctly realigned when it's installed again. Using adjustable-joint pliers, loosen the lock ring that secures the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Carefully lift the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly from the fuel tank. Angle the module so that you don't bend the float arm of the Fuel Level Sensor or damage the fuel pump inlet strainer. If you're removing the auxiliary pump on an AWD model, raise the fuel pump module and disconnect the internal fuel line. While the pump is removed, inspect the pump inlet strainer. Make sure that it's not clogged or damaged. If the inlet strainer is dirty, try washing it in clean solvent. If it's still clogged, replace it. Installation is the reverse of removal. Line up the marks, and tighten the fuel pump module lock ring securely.

All wheel drive (AWD) models have a saddle fuel tank configuration and have main and auxiliary fuel pumps. Each fuel pump has a sending unit. The auxiliary fuel pump contains the fuel pump reservoir, fuel pressure regulator and fuel filter. Relieve the fuel system pressure. Disconnect the negative battery cable from the remote ground terminal or battery. Remove the rear seat cushion and fuel pump module cover. On AWD models, remove main and auxiliary fuel pump module covers. Disconnect the fuel delivery line quick-connect fitting and on 2015 and later models, also disconnect the fuel vapor line from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Disconnect the electrical connector from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Before removing the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly, make alignment marks on the assembly and the fuel tank (if marks don't already exist), to ensure the assembly will be correctly realigned when it's installed again. Using adjustable-joint pliers, loosen the lock ring that secures the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Carefully lift the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly from the fuel tank. Angle the module so that you don't bend the float arm of the Fuel Level Sensor or damage the fuel pump inlet strainer. If you're removing the auxiliary pump on an AWD model, raise the fuel pump module and disconnect the internal fuel line. While the pump is removed, inspect the pump inlet strainer. Make sure that it's not clogged or damaged. If the inlet strainer is dirty, try washing it in clean solvent. If it's still clogged, replace it. Installation is the reverse of removal. Line up the marks, and tighten the fuel pump module lock ring securely.

All wheel drive (AWD) models have a saddle fuel tank configuration and have main and auxiliary fuel pumps. Each fuel pump has a sending unit. The auxiliary fuel pump contains the fuel pump reservoir, fuel pressure regulator and fuel filter. Relieve the fuel system pressure. Disconnect the negative battery cable from the remote ground terminal or battery. Remove the rear seat cushion and fuel pump module cover. On AWD models, remove main and auxiliary fuel pump module covers. Disconnect the fuel delivery line quick-connect fitting and on 2015 and later models, also disconnect the fuel vapor line from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Disconnect the electrical connector from the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Before removing the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly, make alignment marks on the assembly and the fuel tank (if marks don't already exist), to ensure the assembly will be correctly realigned when it's installed again. Using adjustable-joint pliers, loosen the lock ring that secures the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly. Carefully lift the fuel pump/fuel pressure regulator/Fuel Level Sensor assembly from the fuel tank. Angle the module so that you don't bend the float arm of the Fuel Level Sensor or damage the fuel pump inlet strainer. If you're removing the auxiliary pump on an AWD model, raise the fuel pump module and disconnect the internal fuel line. While the pump is removed, inspect the pump inlet strainer. Make sure that it's not clogged or damaged. If the inlet strainer is dirty, try washing it in clean solvent. If it's still clogged, replace it. Installation is the reverse of removal. Line up the marks, and tighten the fuel pump module lock ring securely.

The following procedure is only applicable to earlier style fuel pump/pressure regulator/sending unit assemblies with a removable fuel pressure regulator. Before attempting to remove the regulator, verify with a dealership parts department that the regulator is removable. If it is, follow the procedure below to replace the regulator. If it is not removable, the fuel pump and fuel pressure regulator must be replaced as a single assembly. The fuel pump/regulator assembly can be purchased without a new fuel level sending unit, allowing for the swapping of the old sending unit to the new assembly. Alternatively, the whole assembly, including a sending unit, can be purchased. To replace the regulator, first relieve the system fuel pressure and disconnect the negative battery terminal cable. Remove the fuel tank and then the fuel pump/regulator/sending unit assembly. Carefully pry the pressure regulator out of the assembly by spreading the retaining tabs apart. If replacing the regulator, use new O-rings during installation. If reusing the old regulator, replace the upper and lower O-rings with new ones. Do not install a new or used regulator with old O-rings. Coat the new O-rings with clean gasoline during installation. The installation process is the reverse of removal.

To replace the left fuel level sensor and fuel pump module, start by removing the module and cutting the wiring harness clip. Loosen the two retaining clips and pull out the sensor. For the right fuel level sensor, fuel pressure regulator, and fuel filter module, remove the module and disconnect the sensor.

To relieve fuel pressure, disconnect the negative battery cable. For the 3.3L and 3.8L engines, detach the vacuum hose and remove the regulator retainer screw and retainer. Inspect O-rings and replace them if damaged. Installation is the reverse of removal, ensuring lubrication and O-ring installation.

The fuel pressure regulator is on the bottom of the upper section of the fuel pump module. Detach the fuel lines and electrical connector from the bottom side of the upper section and remove them from the fuel pump module. Replace the section of the fuel pump module that contains the regulator. To reinstall, switch the removal steps going from the last step to the first step.

Loosen the locknut securing the assembly using a brass punch and hammer, and carefully lift it from the fuel tank, being mindful of the float arm and fuel pump inlet strainer.

If replacing the regulator, use new O-rings during installation. If reusing the old regulator, replace the upper and lower O-rings with new ones. Do not install a new or used regulator with old O-rings. Coat the new O-rings with clean gasoline during installation.

Reinstall the assembly and tighten the locknut securely.

After installing the new parts, the negative battery cable should be reconnected, and a thorough check for fuel leaks should be conducted. Finally, the air cleaner assembly can be installed.

Using two flare nut or open end wrenches, loosen the return tube nut and install the fuel pressure dampener. Ensure that the fuel return tube nut is securely tightened.

The fuel pressure regulator is located on the bottom side of the upper section of the fuel pump module.

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