How to Change a Fuel Pump on Nissan Cars

by Contributing Writer; Updated June 12, 2017

So, you've got a full tank of gas. Now you have to get that gas to the engine to give you some get-up-and-go. That's the job of the fuel pump, located in the top of the fuel tank. The pump is an electrical device that feeds fuel from the tank, through the fuel lines, to the engine. A car that will crank, but not start, is often a sign of problems with the pump. Changing the pump will take about an hour.

Under The Hood:

 How to Change a Fuel Pump on a Nissan Titan

Pull the truck up on blocks and activate the parking brake.

Slide under the truck and locate the fuel pump. This is located under the driver's side on Titans.

Unplug the usage cord from the side of the fuel pump. You may have to lift the front clip on the plug, as it is what keeps the plug secured.

Loosen both sides of the fuel pump with an end wrench and remove the pump. Cover the input valve side with your finger to prevent too much fuel from leaking out.

Wipe both the input and output valve with a clean rag to remove any sludge and debris.

Slide the new fuel pump onto into its slot, and tighten both sides. Make sure not to get either of the valves cross-threaded.

Replace the usage cord plug. Make sure that the latch is completely secured.

Items you will need

  • Standard end-wrench set

 How to Replace the Fuel Pump on a 1997 Nissan Altima

Removal

Disconnect the fuel pump fuse from inside the car's fuse box in the driver's floorboard. Start the car and run the engine until it stalls, then crank the engine for another three seconds to completely depressurize the fuel system.

Loosen the mounting bolts for the bench and back portions of the back seat using a wrench, lift up the seat back to release it from its clips and remove the seat from the car.

Unscrew the four screws for the fuel pump access cover with a screwdriver and remove it. Please note that the fuel hoses are connected to the access cover.

Disconnect the electrical connector for the fuel pump and then disconnect the fuel hoses, loosening the hose clamps with pliers. Label the hoses so you know which line on the pump module each hose connects to.

Mark the pump's locking ring to show its position with the car body. Unscrew the locking ring by hand and the assistance of a lock ring tool; if it is stuck, lightly tap it with a small hammer and drift.

Lift the fuel pump assembly out of the fuel tank.

Installation

Install the replacement fuel pump in the tank and make sure it seats properly.

Screw the locking ring in place and then tighten it fully using the locking ring tool.

Connect the fuel hoses to the pump module with their hose clamps, then connect the electrical connector.

Seat the access cover back in place over the pump module and tighten the screws.

Reinstall the back seat into position, lower it so the seat back clips into place and apply the mounting bolts.

Items you will need

  • Wrench

  • Screwdriver

  • Pliers

  • Labels

  • Lock ring tool

  • Hammer and drift

 How to Replace the Fuel Pump on a 1998 Nissan Altima

Open the fuel cap to relieve pressure in the fuel tank.

Open the fuse box cover in the passenger compartment. The fuse box is located below and to the left of the steering wheel and has a snap-off cover. Remove the fuel pump fuse, which is a 15A fuse, third fuse from the bottom, second column from the left.

Start the engine and let it run until all fuel has been used from the lines and the car dies. Attempt to start the car to ensure the procedure was successful. Open the hood and remove the negative battery cable. This helps avoid sparks that can lead to a fire when working with gasoline.

Remove the bottom of the rear set. There is a pull handle on the front of each side of the seat. Pull the handle and at the same time pull the seat up and toward you. Repeat on the other side to release the seat. Remove it from the vehicle. An assistant will make this job easier.

Remove the inspection hole cover by removing the screws around its edges with a Phillips screwdriver.

Disconnect the two fuel lines, marking them beforehand so you can replace them to the correct connector during reassembly. The connectors are a quick-release type. Press the two tabs on the side of the connector and pull the two ends apart.

Remove the lock ring. Nissan makes a special tool for this (J38879), but you can also use a very large pair of channel-lock pliers or vise grips. If it's not too tight, you might even be able to turn it by hand. Unscrew the lock ring counterclockwise.

Lift up the tube plate and disconnect the fuel tube and electrical connector on the bottom of the plate. Both of these pull off without any type of retainers.

Reach into the hole pull out the fuel pump. There are large tabs on each side that you must pinch together to be able to pull the pump out of the tank.

Pull off the rubber O-ring that surrounds the hole and replace it with a new one. Insert the new fuel pump into the tank, making sure both tabs lock into place.

Attach the fuel tube and electrical connector of the new pump, to the bottom of the tube plate and seat the plate back into the inspection hole.

Replace the lock ring by screwing it clockwise. The factory specifications are for 22 foot-pounds of torque, but as long as you tighten it firmly, it will be all right.

Snap the two fuel lines to the tube plate. Make sure they are attached to the proper place.

Connect the negative battery cable. Replace the fuel pump fuse and close the fuse box cover. Turn the car's ignition to "On" without starting it, then turn it off. Repeat this several times to prime the fuel lines. Start the car and let it run a few minutes. If it runs fine, the procedure was a success. Turn off the car.

Replace the inspection hole cover and replace the screws. Replace the seat bottom by putting it in place, slightly raising the front of the seat and pushing it back as far as possible. Let the front down. Pull the handles in the front and press the seat back. The bottom should lock into place. Release the handles and try to pull the seat, to make sure it locked firmly.

Items you will need

  • Socket set

  • Phillips screwdriver

  • Locking ring tool (Nissan part-J38879)

  • Newspapers

 How to Replace a Fuel Pump in a Nissan Altima

Determine the fuel pump that your Nissan Altima will require. This depends on the make and model and engine size of your vehicle. Models made before 2002 will have a 2.4 L KA24DE engine and models made after 2001 may have a 2.5 L QR25DE or a 3.5 L VQ35DE engine.

Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench.

Access the fuel pump by taking out the rear seat and removing the access cover. Unplug the fuel pump's electrical connection and disconnect the fuel lines from the fuel pump. Remove the locking ring or screws with a socket wrench and disconnect the fuel gauge assembly so that you can disconnect the fuel tube from the fuel gauge.

Remove the fuel pump by holding the connector for the fuel line in one hand while pressing down on the two locking tabs at the same time. Lift the fuel pump out of the fuel tank. Discard the O-ring.

Install the new fuel pump using the items included in the kit, especially the O-ring. If you have a threaded lock ring, torque it to between 22 and 26 ft. lbs. If you have lock ring with six retaining screws, torque them to between 18 and 22 in. lbs.

Items you will need

  • Fuel pump kit

  • Socket wrench set

  • Torque wrench

 How to Replace a Fuel Pump in a Nissan Maxima

Select the new fuel pump for your Nissan Maxima. You will not only need to know the make and model, but also the engine size. Models made from 1981 to 1984 have a 2.4 L or 2.8 L diesel engine, and 1985 to 1999 models have a 3.0 L engine in several different types and configurations. Models built from 2000 to 2003 have a 3.0 L or 3.5 L engine, and the Nissan Maxima has been equipped with a 3.5 L engine since 2004.

Prepare your vehicle for fuel pump servicing. Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench. Locate the access panel under the rear seat or in the trunk, depending on the specific model.

Disconnect the electrical connectors for the fuel gauge and fuel pump, then remove the fuel send and return hoses. Some models require you to unbolt the fuel pump from the fuel tank. Others require you remove a locking ring and lift the fuel pump out of the tank. Discard the O-ring.

Install the new fuel pump using the items included in the kit and be sure to replace the O-ring seal and clamps on the fuel line hoses. Use a torque wrench to tighten the attaching bolts for the fuel tank strap to 22 in. lbs. (if present).

Complete the installation by reversing the removal procedure.

Items you will need

  • Fuel pump kit

  • Socket wrench set

  • Torque wrench

 How to Replace a Fuel Pump in a Nissan Sentra

Choose a new fuel pump for your Nissan Sentra. This will require you to know the make and model, engine size and engine type. Models made from 1982 to 1986 may have a 1.5 L, 1.6 L or 1.7 L diesel engine and 1986 to 1990 use 1.6 L engines. Models made from 1991 to 1994 may have a 1.4 L, 1.6 L or 2.0 L engine.

Look at later versions of the Nissan Sentra. Models manufactured from 1995 to 1999 may have a 1.6 L or 2.0 L engine, and engine sizes for 2000 to 2006 models are 1.8 L, 2.5 L and 2.0 L. The current generation debuted in 2007 and is available with a 2.0 L MR20DE engine.

Prepare your vehicle for fuel pump servicing. Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench.

Lift up the rear seat and open the inspection cover under the rear seat. Disconnect the send and return fuel lines from the fuel pump and unplug the electrical connections from the fuel gauge and pump.

Remove the six mounting bolts from the fuel pump assembly and raise it out of the fuel tank. Discard the O-ring seal or gasket.

Install the new fuel pump using the items included in the kit, especially the O-ring seal or gasket. You should also replace the fuel hoses and clamps at this time. Tighten the mounting bolts on the fuel pump to between 18 and 22 in. lbs. with a torque wrench.

Items you will need

  • Fuel pump kit

  • Socket wrench set

  • Torque wrench

 How to Replace a Fuel Pump in a Nissan Pathfinder

Determine which fuel pump your Nissan Pathfinder will need. This depends not only on the make and model, but also the engine size. Models built from 1991 to 1995 came with a 2.5 L K, 3.0 L Mitsubishi 6G72, 3.3L EGA or 3.8 L EGH engine. Models made after 1995 may have a 2.4 L EDZ, 3.0 L Mitsubishi 6G72, 3.3 L EGA or 3.8 L EGH engine.

Relieve the fuel system pressure and disconnect the negative battery cable with a socket wrench. Remove the fuel filler hose from the fuel tank. Disconnect the evaporative emissions hose and vent pipe from the fuel pump assembly. Remove the fuel tank shield and the drive shaft.

Support the fuel tank with a hydraulic jack and take off the bolts on the fuel tank strap with a socket wrench so that you can lower the tank. Unplug the fuel pump's electrical connection and fuel supply hose.

Remove the lock ring on the fuel pump with tool J-45722 and take out the fuel pump. Install the new fuel pump using the items included in the kit.

Complete the installation by reversing the removal procedure.

Check for leaks by turning the ignition on without starting the engine.

Items you will need

  • Fuel pump kit

  • Hydraulic jack

  • Socket wrench set

  • Tool J-45722

 How to Replace a Fuel Pump in a 1995 Nissan Altima

Remove the plastic panel in the passenger side footwell (next to the glove box). Then remove the plastic fuse box cover. Pull out the fuel pump fuse (refer to the diagram on the underside of the fuse box cover).

Crank the engine and let it run until it shuts off. Then, crank the engine again to completely relieve the fuel system pressure. Turn the engine off and remove the key.

Disconnect the negative battery cable (--) with the pliers. Loosen the nut around the cable and lift it away from the terminal.

Pull the straps along the bottom of the rear seat cushion to remove it from the floorboard. The fuel pump access cover is underneath the rear seat cushion.

Remove the four Phillips head screws from the fuel pump access cover. Lift the cover away to view the fuel pump assembly.

Disconnect the electrical harness attached to the assembly, and then carefully pull off the two hoses (use a pair of pliers to open the clamps). Label or mentally note the hose connection ports; you don't want to crisscross them when installing the new fuel pump.

Matchmark the locking ring per its position. Make a small mark on the ring and the vehicle (this is to prevent overtightening during re-installation). Use the fuel pump locking ring tool (number J-38879) to twist and remove the locking ring. Do not attempt to remove it with pliers or other tools; this could cause damage.

Lift the fuel pump assembly from its mount. Detach the fuel pump from the assembly by pinching the two tabs together. Insert the new fuel pump into the assembly.

Remove the old o-ring gasket from the assembly. Attach the new o-ring gasket to the assembly.

Re-insert the fuel pump assembly into its mount. Attach and tighten the locking with tool J-38879. Line up the matchmarks to prevent over-tightening (this could cause damage to the threads) or under-tightening.

Re-attach the electrical harness and the fuel pump lines per their original position. Reinsert the fuel pump fuse into the passenger side fuse compartment.

Reconnect the negative battery cable. Insert the key and cycle it between "On" and "Off" a few times, back and forth. This will help rebuild system pressure.

Start the engine. Inspect the fuel pump area and connections for leaks. Turn the engine off, replace the fuel pump access cover, and tighten the screws. Replace the rear seat cushion to finish.

Items you will need

  • Pliers

  • Rubber gloves

  • Phillips screwdriver

  • Shop towels

  • Fuel pump lock ring tool (J-38879)

  • Marker or label

  • Replacement fuel pump

  • Replacement gasket (o-ring)

About the Author

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