If the system pressure is less than 250 kPa (2.5 kgf/cm2), replace the fuel filter (see «Fuel filter replacement»).
If this does not help, try removing the pump and flushing the mesh of its receiver. If the pressure still does not rise, the fuel pump must be replaced. The composition of the fuel pump includes a fuel level sensor, a fuel filter and the actual electric pump. All these elements are installed in the bracket and the fuel pump housing.
The main malfunctions of the fuel pump:
- failure or incorrect operation of the fuel gauge sensor;
- clogging or damage to the fuel filter of the pump;
- failure of the electric pump.
In most cases, the malfunction of the fuel level sensor is caused by contamination or oxidation of its contact group.
You will need: screwdriver, keys «at 17», «at 13».
1. Disconnect the wire from the terminal «–» battery.
2. Reduce the pressure in the supply system (see «Reducing the pressure in the power system»).
3. Remove the fuel tank (see «Removal and installation of the fuel tank»).
4. Unscrew the nut of the fuel drain pipe..
5.... and disconnect the fuel line from the fuel pump.
Note. The fuel supply fuel line and wiring harness block were disconnected when the fuel tank was removed.
6. Turn away nuts of fastening of the pump …
7.... and remove the pressure ring.
8. Remove the fuel pump with the fuel level sensor from the tank.
9. Remove a rubber sealing ring of the fuel pump. A cracked, loose ring must be replaced.
10. If the storage cup remains in the fuel tank when the pump is removed, remove it.
Note. Before reinstalling the pump, secure the accumulator to the housing with plastic clips.
11. Turn out screws of fastening of the gauge of the index of level of fuel..
12.... and disconnect the sensor.
13. Disconnect the block of wires from the bracket..
14.... and from the fuel pump motor.
15. To replace or clean the fuel filter, pry its base with a pointed tool and remove it from the pump housing. Remove the lock washer.
16. Overcoming the force of the spring, press the pump housing down along the guides, remove the locking pin..
17.... and remove the housing together with the electric motor from the bracket guides.
18. Turn out two screws and remove..
19.... cover..
20.... and a rubber bushing.
21. Remove the fuel pump from the housing.
22. Remove the rubber sealing bushing from the housing; if there are cracks or tears on the bushing, replace it.
23. Install the electric pump and all removed parts in the reverse order of removal.
24. Before installing the manhole cover, start the engine and check the fuel line connections for leaks.
Note. When installing the fuel pump in the fuel tank, the arrow on the flange of the fuel pump cover must point towards the rear of the vehicle.