How to Replace the Fuel Pump on a 1997 Nissan Altimaby Chris Moore
The 1997 Nissan Altima is one of those cars where the fuel pump is installed within the fuel tank, but you do not have to remove the tank from the car to access the pump. There is an access cover underneath the back seat from which you can reach, remove and install the pump. The fuel pump is part of a module that includes the fuel sending unit and replacing a fuel pump on this model means replacing the whole module.
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.
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.