Replacing the gasoline pump with your own hands

Depending on what kind of injection system is used in the car, the replacement of the gasoline pump also varies. It is worthwhile to look at how fuel is delivered in carburetor and injector cars. Despite the fact that the former have not been produced for a long time, there are a large number of them on their roads to this day. And some tuners prefer carburetor engines, because at low speeds they are able to give torque and power higher than the injector. But the latter are more convenient to operate. One fact of the absence of a suction is enough.

Petrol pump in carburetor cars

It has one small feature - it is driven by a cam mechanism located on the camshaft. The design does not have a petrol pump relay, since the drive is mechanical, no electronic control is provided. A simple membrane, which is driven by a rod. In the initial position helps her to return the spring. As the rod moves constantly, the membrane also makes motion without stopping when the engine is running. To ensure a normal supply of gasoline to the carburetor, a system of two valves is used.

To replace the fuel pump, you need two tools - a screwdriver and a key to 13. First, you need to loosen the clamps that hold the fuel pipes secure. Remove them neatly, if necessary, perform a replacement. It is better to carry out this work on a cooled engine. After that, you need to unscrew two nuts with a key on 13. This is all the fixing of the housing of the gasoline pump. If you plan to replace the rod, then you need to install gaskets for the gasoline pump. It is necessary to ensure the maximum outreach of the rod, it should be as specified in the manual for a particular car. Further replacement of the gasoline pump is to install a new and connect fuel pipes.

How does the injection engine work?

For reliable operation of the engine with direct injection, an element such as a gasoline pump is used. It creates pressure in the fuel rail, which is necessary for fuel injection. In fact, there is nothing complicated in the process. The fuel-air mixture is in a compressed state. The ramp is equipped with electromagnetic valves (nozzles), which open and close the supply of gasoline. The feed of the electronic control unit, as well as the system of sensors connected to it, is regulated.

Injection motor petrol pump

Here, the design is a bit more complicated, and it's useless to look for a fuel pump in the engine compartment, because it's not there. It is located directly in the tank. But do not think that the elementary replacement of the filter of the gasoline pump will result in the fact that you will need to dismantle the tank. Not at all, just raise the rear seat, under which you will see a layer of carpet or noise insulation. Closer to the right side is a square cutout, which without damage to the car rises.

Under it you will see a plastic cap, which is fixed by two screws. Having unscrewed them, you get access to the compartment of the gasoline pump. Two hoses are connected to it, as well as wires for connection of the motor and the float level sensor. The last two devices are united into one node. To pull out the entire structure, you need to disconnect the plugs, detach the pipes, and also unscrew eight nuts. On most cars, they are twisted with a key for 8. Before starting work, remove the dust so that it does not enter the fuel tank after removing the pump.

Check of working capacity of the fuel pump

If you do not hear a buzz from the rear of the car when you turn on the ignition, then most likely, there is no switching on the gasoline pump. The reasons for this can be many. It is possible that the petrol pump relay has failed. But there may be more unexpected breakdowns, which can not always be recognized immediately. For example, damage to the wiring. Disconnect the power plug from the pump and measure voltage there. If it is not present, and the relay is correct, then it is possible that the integrity of the wiring is broken. But before dismantling the entire cabin to search for an open, check the fuse.

But this is not all the reasons for which there may be no voltage on the fuel pump. Often the alarm unit breaks down. To prevent car theft, installers of security systems break the wire that goes to the fuel pump. It is quite reasonable: if there is no supply of a gasoline pump, then it will not work, will not create pressure in the ramp, which would be enough for the functioning of the engine. If the cause of the fault lies in the central alarm unit, then you need to find the place of connection of the power contacts. And restore the factory condition of the wiring.

Installing the gasoline pump

If the electric motor fails, then there is no sense in restoring the structure. It is worth noting that changing the entire gasoline pump, the price of which is 2500-2600 rubles, there is no sense. It will be cheaper to replace the electric motor with a pump. The price of this device is 1000-1500 rubles, depending on the manufacturer. But if you decide to change the filter and fuel level sensor in passing , the cost of all the elements of the system will be approximately equal to the price of the entire unit.

Installation of the gasoline pump does not take much time, you will need a key for 8, preferably a tubular type, since it is more convenient to work with it. You will also need a screwdriver - cross or flat, depending on which clamps you use. Install a new gasket on the studs, then carefully mount the pump housing into the hole. After that, combine the holes to get the studs in them. Press on the nuts, then tighten them. Now it remains to connect the fuel pipes and install the plugs into their seats. It is quite simple to replace the gasoline pump. "Priora" is one of the new domestic cars, but even on it the installation of the fuel pump is performed according to a similar scheme.

conclusions

Despite the fact that the pump is located at such a distance from the driver, it should always be watched. First, change the filter in time. Secondly, clean the motor contacts from oxides. Pay attention to the fact that when the filter is clogged the engine starts to work under a greater load, sometimes it does not even have time to pump the required amount of gasoline into the ramp. And if you run everything, allow the filter to collapse, then all the dirt will get into the jets, which will instantly clog. Timely replacement of the gasoline pump and filter will avoid such deplorable results.