Do you take back seat out to replace fuel pump on 94 nissan sentra ex car

On the 94 sentra the fuel pump relay is located under the hood, driver's side to the left of the battery, third slot from the front of the car, should be green in color.

Here is the best solution i can find, apparently the fuel filter in a 2006 Sentra is connected to the fuel pump in the tank, under the back seat there is an inspection cover that will allow you access to the fuel pump. Here is an ehow link that walks you through the entire process. How to Replace Fuel Filter in Nissan Sentra eHow

1984 Nissan Sentra? I believe this fuel pump is mounted on the engine, thats a mechanical fuel pump, you sure its not a 1994? If its a 94, you can change the o-ring yourself if you're up for it. On 94's the pump is mounted under the back seat through an access panel via 4 phillips screws.

fuel filter is part of the fuel pump meaning you have to replace fuel filter and fuel pump as a assembly.

not sure about your altima, my daughters sentra tells me to remove rear seat , can gain access to fuel pump for replacement ! call dealer !

You need a fuel pump update kit. Go to your closet Nissan dealership and ask them for a rebuild kit for your fuel sending unit. What has happened is the check ball that keeps gas in the fuel line is not seating well and letting all the gas go back into the fuel tank. So when you try and start the car fuel has to come from all the way in the fuel tank.

First you should check the fuel presure,that way you will notice there was somting wrong,fuel filter,plug on the line.

lift the back seat and there should be an acces panel there

1991-96 Sentra
See Figures 6 and 7

CAUTION Fuel injection systems remain under pressure after the engine has been turned OFF. Properly relieve fuel pressure before disconnecting any fuel lines. Also observe all safety practices outlined earlier in the Fuel System Safety Precautions. Failure to do so may result in fire or personal injury.

1. Following proper procedures, relieve fuel system residual pressure.
2. Disconnect the negative battery cable.
3. Drain the fuel tank.
4. Remove the rear seat cushion.
5. Remove the inspection cover.
6. Disconnect the fuel gauge and the fuel pump electrical harness connector.
7. At the fuel filler door, disconnect the fuel filler tube from the body.
8. Raise and support the vehicle safely.
9. Disconnect the ventilation hoses.
10. Disconnect the fuel outlet, return and evaporation hoses, at the front of the tank and plug the open fuel lines.

If equipped, remove the tank protector.

1. Support the tank, remove the fuel tank mounting bolts, and lower the tank from the vehicle.

To install:
If the sending unit or the fuel pump are removed, a new O-ring must be installed.

1. Install the fuel tank to vehicle and torque the mounting bolts to 20-26 ft. lbs. (27-37 Nm). If removed, install the fuel tank protector.
2. Connect all the fuel lines and ventilation hoses.
3. Lower the vehicle and connect the filler tube to the vehicle body.
4. Connect the fuel gauge and fuel pump electrical connections.
5. Install the inspection cover and rear seat cushion.
6. Pour fuel back into fuel tank.
7. Connect the negative battery cable.
8. Start engine and check for fuel leaks.

Fig. 5: Exploded view of the fuel tank components-1988-90 4WD Sentra



Fig. 6: Exploded view of the fuel tank components-1991-94 Sentra/NX Coupe



Fig. 7: Exploded view of the fuel tank components-1995-96 Sentra


Hope this help (remember rated and comment this) TY for using Fixya.

You have to remove the rear seat cushion and there is an inspection hole cover over the sending unit and fuel pump. The 2 come out as one unit. Remove the fuel line coupling and then the 6 screws holding the inspection cover on. BE CAREFUL not to bend the level sending arm. If you remove the fuel filter, make sure you mark which way it came of so it cam be put back in the same way.
Bob 2003 Nissan Sentra SE-R SPEC V