Petrol pump VAZ 2109: Injector as it works. Replacement and inspection

It will be necessary to consider the features that the VAZ 2109 petrol pump has . Injector if in the fuel injection system, then the electric pump. Its application is due to the fact that there is a need for fuel management in the combustion chambers. But, as you know, gasoline comes first to a special ramp, in which it mixes it with air in a certain proportion (14 to 1). It maintains a constant pressure, by which the mixture is fed into the combustion chamber through the holes in the electromagnetic nozzles. These are devices that turn a fuel-air mixture into very small droplets. In fact, the combustion chamber ignites fog, in which the gasoline is in suspension.

How the fuel pump works

There is nothing complicated in the fuel supply system . The usual pump, which is driven by a rotor of an electric motor. To protect the entire fuel system from getting small particles, a filter is used. But this does not end features, because it is worth noting that it is necessary to maintain the pressure in the ramp at the same level. A gasoline pump VAZ 2109 (injector without it simply can not work), provided that it will constantly pump gasoline, will increase the pressure higher and higher. And from this the work of the system will be disrupted.

Therefore, it is necessary to carry out pressure adjustment. For this purpose, a special device is used, which is called the pressure regulator. It is installed in the fuel rail, connected to the pipeline, which serves to drop excess fuel into the tank. When the ignition is switched on, the pressure sensor in the ramp is interrogated, after which the petrol pump drive starts. After the pressure in the ramp has risen to the required value, the fuel pump is turned off. Therefore, it does not work constantly.

How to remove the petrol pump

Located under the rear seat of the petrol pump VAZ 2109. Injector means its installation directly in the tank. The thing is that the pump is submersible. In one node with it there is a sensor of a level of fuel of a float type. It works due to the fact that the float moves the slider on the variable resistance. In this case, the current changes in the supply circuit. The amount of change is determined by the amount of gasoline that remains in the tank. To remove the pump, you need to use a pair of pliers, a screwdriver and a key for 8.

It is possible that the reason that there is no fuel supply is the non-working relay of the petrol pump VAZ 2109. The injector has it in its composition, and also a fuse that could easily burn. Before starting work, thoroughly clean the entire cover so that dust does not get inside the tank after removal. Then, using a screwdriver, loosen the hose clamps with which the hoses are tightened. Remove them if you do not get them by hand, then try gently squeezing them with pliers and scrolling. Then, using a 8-key, unscrew all the nuts that secure the cover to the tank body. Pay attention to the fact that there are washers. Do not lose them. That's all, now the pump can be safely removed for replacement or repair.

Checking the pump operation

Check is easy even without the presence of special tools for the petrol pump VAZ 2109. The injector can not work without pressure in the fuel rail. Therefore, you need the pump motor to rotate. It is not difficult to check this, it is enough to connect its terminals to the battery. If you are afraid, then plug a filament lamp into the rupture of one wire . It will help to determine the serviceability of the motor winding. Please note that the filter should be as clean as possible. If it is clogged, then change it. Otherwise, the pump will not be able to create the right pressure.

Installing the pump

Pay attention to the condition of the wires when replacing the VAZ 2109 petrol pump . The injector implies the motor power supply from the on-board network, therefore there should not be breakages and destruction of insulation. Installation of the fuel pump is carried out in sequence, return to removal. First put the body in the tank, getting on the studs. Then, tighten all the nuts, then replace the hoses and connect the plug with the wires.