When you turn the ignition key to start, you should hear the pump make a noise for just a moment. A gauge will tell you if the pump is putting out the correct pressure.
The 1996 Nissan 240 fuel pump is located on the front side of the fuel tank. You will need to get beneath the vehicle in order to view the fuel pump.
in the floor of the trunk or hatch
The fuel pump is located in the fuel tank. There is an access plate under the carpet above the fuel tank.
Your local auto parts dealer
The fuel pump on a 1991 Nissan 240 SX is located back by the fuel tank. It is an in-line pump, in the fuel line that runs from the gas tank to the carburetor. It is about the same size as a large soup can.
I have a 91 240SX and had a similar issue, my Fuel Pump had to be replaced.
It is in the fuel tank! Access panel is behind the rear seat and under the carpet. Pros only I am afraid.
hard starting or it fill like you run out of gas. it will turn but won't start.
It's below the light silver peice, under the right side of the engine bay.
It is in the fuse panel located in the engine compartment, it should be right above the battery. The fuel pump relay is in there, but if I remember correctly, its coded "EGI pump" on the diagram.
The fuel pump access cover is located under the rear seat. It is held in place by 4 screws. Once the cover is removed you will have access to the fuel pump components. The large locking ring should twist off easily and the fuel pump assembly can be lifted from the fuel tank.
First thing would be that the car won't start. You can also just look in the trunk next to the spare tire hole and under the plate is your fuel pump. If it is not there then you will know.