Wednesday, December 18, 2013
How to Replace the Fuel Pump in a 1991 Nissan 240SX
The 240SX is a two-door compact car that Nissan sold in North America from 1989 to 1998. The 1991 model belongs to the first generation of the 240SX that was in production from 1989 to 1995. These vehicles were equipped with a 4-cylinder, 2.4-liter engine that uses sequential fuel injection. This type of fuel injection uses an electric fuel pump to deliver fuel at high pressure. The fuel pump for the 1991 Nissan 240SX is accessible from the trunk of the vehicle.
Instructions
- 1
Remove the fuse for the fuel pump from the fuse box under the dashboard. Start the engine and let it run until it stalls. Crank the engine twice to relieve the pressure in the fuel system. Turn the ignition off, and replace the fuse for the fuel pump.
2Disconnect the cable for the negative terminal on the battery with a socket wrench to prevent accidental sparking. Open the rear trunk and disconnect the electrical connector for the fuel gauge. Remove the cover for the fuel tank. Disconnect the fuel lines from the fuel pump assembly.
3Remove the retaining bolts for the fuel pump assembly with a socket wrench. Lift the fuel pump assembly out of the fuel tank, and discard the O-ring on the fuel tank. Plug the resultant opening in the fuel tank with a clean shop rag to keep dirt out of the fuel tank.
4Remove the shop rag from the fuel tank opening. Install a new O-ring onto the fuel tank. Place the new fuel pump assembly into the fuel tank, and fasten the fuel pump assemblys retaining bolts with a socket wrench. Attach the fuel lines and electrical connection, and replace the cover for the fuel tank.
5Connect the cable to the negative terminal of the battery with a socket wrench. Start the engine and check the fuel system for leaks.
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