Fuel Module Disassembly Shown Here.
Fuel module: 1 - glass; 2 - fuel filter; 3 – module cover; 4 - fuel gauge sensor; 5 - float
When to change the fuel pump
The reason for replacing the fuel pump, in addition to its complete failure, is usually the changed behavior of the car.
The most characteristic signs of a pump failure are:
- partial loss of power;
- inadequate response to «gas»;
- unstable operation of the engine at minimum idle speed;
- change in the tone of the motor;
- noise in the fuel tank;
- uncertain start of the engine.
In all these cases, as a rule, the mechanical wear of the parts of the electric fuel pump or the burning of its contacts is to blame. Sometimes the fuel filter at the inlet is simply dirty. It can be washed, but it is better to buy a new one and replace it. To carry out these operations, it is necessary to remove the fuel module.
Removing
Put the car on the working place and brake with the parking brake.
For vehicles with a body "station wagon"
Tilt the rear row of seats forward (for 5-seater configuration) or middle row (for 7-seater configuration).
Lift the lid and lift up the floor covering.
For vehicles with a body "van"
Remove trim for center pillar on right side.
Remove the right side of the bulkhead.
Remove the right front cargo area floor.
Operations for all vehicle configurations
Remove cover 1, Figure 11-26, electric fuel pump hatch.
Figure 11-26 - Removing the fuel pump manhole cover.
I pry the latch off with a screwdriver...
... disconnect connector 1, Figure 11-27, rear wiring harness from fuel pump module 2.
Figure 11-27 - Removing the fuel pump module: 1 - block of the rear wiring harness to the fuel pump module; 2 - electric fuel pump module; 3 - nut for fastening the fuel pump module; 4 - fuel tank; 5 - fuel pipe tube
Start the engine and let it run at idle until it comes to a complete stop to relieve pressure in the fuel system, ensuring that exhaust gases are removed (exhaust coil with fan type SERF/SP f. "SovPlym"). Switch off the ignition.
Disconnect wire terminal "masses" from battery (wrench 10).
Press the spring clips of the connector of the tube 5 of the fuel pipeline and, by moving along the axis of the fitting, disconnect the tube from the fuel pump module.
Turn nut 3 (pressure ring) fastening the fuel pump module counterclockwise (tool Mot. 1397 or key 67.78129704 L for removing and installing the pressure ring of the fuel pump module).
Drawing of a simple device for unscrewing and wrapping the pressure ring of the fuel pump module
If there is no fixture, then we unscrew it with a suitable tool, for example, a mounting blade. Resting against the grooves in the floor panel of the body, we push alternately into different ribs along the circumference of the clamping ring. (do the same for assembly)
Remove the nut.
remove the fuel pump module, removing the float of the fuel gauge sensor from the tank.
Remove sealing ring.
Cover the opening in the fuel tank with thick paper or polyethylene.
Disassembly of the fuel module to replace the pump, filter, or sensor is shown Here.
Installation
Note: According to the regulations, the sealing ring and the nut of the electric fuel pump must be replaced.
Install a new O-ring into the groove on the fuel tank.
Install the electric fuel pump module into the fuel tank, aligning marks 1 and 3, Figure 11-28.
Figure 11-28 - Tags for installing the fuel pump module: 1 - mark on the body of the fuel pump module; 2 - mark on the body of the nut for fastening the fuel pump module; 3 - mark on the body of the fuel tank
Install a new nut for fastening the fuel pump module and, pressing the fuel pump module with your hand (to prevent the o-ring from falling out), screw it clockwise by hand onto the fuel tank.
Install the tool for tightening the nut and tighten the nut for fastening the fuel pump module to the position where mark 2 on the nut is opposite mark 3 on the fuel tank (tool Mot. 1397 or key 67.7812-9704 L for removing and installing the pressure ring of the fuel pump module).
Connect the tube 5, Figure 11-27, to the module 2 of the electric fuel pump by moving along the axis of the fitting until the spring lock of the connector clicks. Check the tube is secure.
Connect connector 1 of the rear wiring harness to the fuel pump module.
Install the hatch cover of the electric fuel pump so that the arrow 1 on the cover is opposite the groove 2 in the floor panel of the body.
Further installation is carried out in the reverse order of removal.
Connect terminal "masses" to the battery.