5.18.5. Removal and installation of the fuel pump

If engine capacity falls, the increased noise or periodic "howlings" during the operation of the fuel pump is heard, then, most likely, the fuel pump failed.
At first check pressure in a fuel supply system, having connected the manometer to the union on a fuel stage in podkapotny space (see. "Check of pressure of fuel in an engine power supply system").
If pressure in a power supply system is higher than 400 kPa (4,0 kgfs/cm2), then pressure regulator installed in the module of the fuel pump is faulty and it needs to be replaced (see. "Repair of the fuel pump").
If pressure in a power supply system is lower than 380 kPa (3,8 kgfs/cm2), replace the fuel filter (see. "Replacement of the fuel filter").
If it does not help, try to remove the pump and to wash out a grid of its receiver.
If in this case pressure does not increase, the fuel pump needs to be replaced.
You will need a key "on 13".
1. Reduce pressure in a power supply system (see. "Pressure decrease of fuel in an engine power supply system").
2. Squeeze a plastic clamp …
3. … also disconnect a fuel tube from the pump union.
4. Wring out a spring clamp …
5. … also disconnect a fuel tube from the second union of the pump.

Prevention
Disconnect hoses from unions of the fuel pump carefully, avoiding side efforts not to break the union.

6. Turn off a nut of fastening of "weight" …
7. … also remove contact of a wire from a hairpin.
8. Turn off the remained seven nuts of fastening of a clamping ring on all perimeter …
9. … also remove a ring.
10. Take the pump from a tank, having inclined it sideways not to bend the lever of the sensor of the index of level of fuel, otherwise indications of the index of level of fuel in a combination of devices will be incorrect.
11. Remove a rubber sealing ring of the fuel pump from a tank flange. The ring which cracked, lost elasticity needs to be replaced new.
12. Install the fuel pump and all removed details as it should be, the return to removal.

Notes
At installation of the module of an electrogasoline pump the adjusting arrow on a cover of the fuel pump has to be sent to the fuel tank towards a back part of the car.
At connection of fuel-supply lines be guided by the arrows on unions specifying the direction of supply of fuel.