For trouble-free operation and increase the resource of the fuel pump, professionals recommend:
use a sporty driving mode less often.
Self-diagnosis and replacement of the fuel pump is quite simple. To do this, you just need to carefully follow the recommendations of professionals. The same applies to preventive measures. Refuel with quality gasoline and do not forget to replace the fuel filter in time.Then you will have problems with the gas pump much less often. Good luck on the road!
We will show you how to replace a fuel pump in a BMW E39 car with your own hands. It is quite simple to do this, the main thing is to observe safety precautions. We take out the sofa of the rear passengers, the technological hole will be on the right, unscrew the 3 screws securing the top cover with a Phillips screwdriver. Disconnect the pump power supply chip.
VIDEO
First, we will explain what a fuel pump is and what work it does for your car. The gas pump is an integral part of the car's propulsion system.
You sit on the steering wheel of your car and turn on the ignition, but the car won't start? And you need to rush to an important business meeting or meet guests at the airport. The car starts, but after driving a short distance, it stalls. What happened? The obvious reason for the refusal of the car to obey you unquestioningly is the breakdown of the fuel pump, or rather its suction valve. If you, as a driver, are still far from the technical characteristics of car units, then we will tell you what this means.
First, we will explain what a fuel pump is and what work it does for your car. The gas pump is an integral part of the car's propulsion system. Where is the fuel pump located in the car? And this location is in two places, depending on the type of fuel pump. If your fuel pump is of a mechanical design, then you need to look for it outside the fuel tank. If you are the owner of an electric fuel pump, then this habitat is located inside the fuel tank. The main function that gas pumps perform is to supply fuel to the engine. Until recently, during the stagnation period, this car part was extremely difficult to get, especially if you have a foreign-made car, today it is not difficult to buy a gas pump for foreign cars. Now let's look at what reasons the gas pump can break down.
There will be two reasons. The first reason is very dirty fuel filters. And the second, no less important reason for its breakdown is the driver's habit of driving a car with an almost empty tank. If the spring of the suction valve of the gasoline pump suddenly breaks in your car, then you need to replace it with a piece of foam rubber. So let's get to work. Take a piece of foam rubber and cut a small cube out of it, so that its sides would ideally fit the dimensions of the fuel pump valve. The height of the parolon cube should be no higher than 8-10 mm. The valve should only slightly press against the seat. And all the work came to an end. You quickly and easily coped with the task. After the relay has been repaired, your fuel pump will work perfectly without failures for many more years.
DIY gas pump repair
Car electric gasoline pump repair. Why does the electric petrol pump fail and how to repair it
Article A short educational program: why is it necessary, what happens to it and how is the repair of an electric gasoline pump carried out.
In the earliest automobiles, fuel entered the engine by gravity. Because of this, sometimes curious situations arose when the rise had to go in reverse.
But this was only at the beginning of the distant twentieth century, and since then the fuel pump has become an integral part of the modern fuel system.
The fuel pump is based on an electric motor. If the resource depended only on it (and this is approximately what happens in Western cars), then the fuel pump would be enough for about 150-200,000 kilometers.
But the fact is that the fuel pump uses the fuel itself as a lubricant, and our fuel is somewhat abrasive:
it is full of the smallest particles, which over time grind off the working elements of the pump, and it begins to lose its working properties long before the electric motor fails;
if the fuel filter is heavily soiled, the situation is even worse.
As a rule, the performance of the fuel pump is much higher than required, so the initial signs of excessive wear can be detected in time. By extraneous noise. This is possible only in our conditions, since the worn-out mechanical parts of the pump begin to make noise.
Although the performance of the fuel pump significantly exceeds the operating parameters, it should not be delayed with the repair.
The fact is that at the moment the engine is started, the voltage of the on-board network drops sharply and the pump performance - even if it is enough for the engine to work - may not be enough to start it. In the end, the matter may end with a jamming of the fuel pump, and then the car will become completely.
The rate of wear can be somewhat reduced by timely cleaning of the fuel system and regular replacement of the fuel filter.
But in winter, the following can happen: if water is in the fuel, then it can freeze and short-circuit the armature winding. This can also lead to seizure of the fuel pump.
The wear of the fuel pump is accompanied by a rather amusing symptom: fuel consumption is reduced. But at the same time, the throttle response of the engine also decreases, so there is nothing to be especially happy about.
1. The first step is to release the pressure in the fuel system. This is done very simply, just remove the fuel pump relay, start the engine and wait until it stalls.
2. After that, the terminals are removed from the battery and the fuel module is removed from the gas tank. In some cases, for this you have to partially disassemble the interior, since the hatch is located under the sofa.
After removing the pump from the fuel module, its flaw detection is carried out, and then repair work is carried out.
3. Quite often, the fuel pump is jammed due to the fact that the protective coating of the inner surface of the bronze ring is erased. As a result, the ring collapses and becomes jammed.
The problem is not at all the low quality of the spraying. The essence of the problem is precisely the abrasiveness of the fuel, and therefore the problem can be eliminated only by changing the fuel.
In the event of such a breakdown, a new ring is made, the top layer of which is cemented. The rollers are also replaced - the fact is that they also work, and if only one ring is replaced, then the operation of the fuel pump will remain ineffective.
4. The electric motor of the fuel pump may also be damaged. In this case, the collector fails, or the brushes wear out. If the capabilities of the service station allow, then you can rewind the anchor.
If axles are produced, they are replaced with new ones with passport parameters. All worn out and broken parts of the fuel module are also replaced with new ones. Finally, the fuel module is assembled and installed back into the vehicle.
The process of repairing the fuel pump is a good reason to thoroughly clean the fuel system, flush the gas tank and replace filters and consumables.
on the topic -Honda Dio 56: repair of an electric gasoline pump in three parts.
Conclusion. As you understand, your desire alone will not be enough to repair the electric petrol pump. You also need special equipment, which is available at a good service station.
Or you have only two ways - to buy new parts or replace them from several faulty pumps.
When you have the time and desire, you can repair a gas pump on a VAZ 2106 with your own hands. In this article, we will tell you in detail about the self-repair of the fuel pump.
Repair of a gas pump on a VAZ 2106
You can clean (replace) the strainer and replace the diaphragms without removing the pump from the engine. But for the convenience of work, it is better to remove the fuel pump and disassemble it on clean paper or cloth.
Note, if you do not have time for repairs, you can simply replace the fuel pump with a VAZ 2106 with your own hands.
1. Using the "10" wrench, unscrew the pump cover mounting bolt.
2. Remove the cover and carefully remove the mesh filter.
3.We inspect the inlet valve (for which we press on it with a thin screwdriver), if necessary, correct its position in the saddle. We wash the filter in a solvent and blow it with compressed air.
4. Use a Phillips screwdriver to unscrew the six screws connecting the upper and lower halves of the pump housing.
5. Then we disconnect these parts.
6. Check the outlet valve in the same way as the inlet valve. We wash the upper part of the case in gasoline and blow it off with compressed air.
7. Rotate the diaphragm assembly 90 ° and remove it from the bottom of the case. Remove the spring from the stem.
8. Using the "8" wrench, unscrew the nut.
9. Then successively remove: the upper steel cup, two working diaphragms, outer and inner spacers, the lower cup and washer.
10. To avoid damaging the safety diaphragm when removing and disassembling the pump, which eventually sticks to the body and the gasket, separate it with a thin knife or flat probe.
11. After cleaning the filter and replacing the torn diaphragms, assemble the pump in the reverse order of disassembly.
12. Install the strainer into the pump casing so that its opening is located above the valve. The flange of the filter hole should fit into the valve hole.
13. After assembling the pump, check its performance. We lower the pump inlet into a container with gasoline and press the manual pumping lever several times. In this case, a pulsating jet of fuel should appear from the outlet nozzle. This means that the pump diaphragms are intact.
14. Again we lower the pump with the inlet pipe into the gasoline and, plugging the outlet connection with our finger, create pressure in the inner cavity of the pump with the manual pumping lever. After 10-15 seconds, letting go of the finger, we check for residual pressure in the pump - gasoline should come out in a stream. If it is not observed, check the tightness of the joints of the body parts and valves. If the tightness cannot be restored by tightening the screws, it is better to replace the pump with a new one.
Do-it-yourself repair of a gas pump on a VAZ 2106 has been successfully completed. Enjoy the trip.
If the dynamics of the car sharply decreased, "dips", jerks during movement began to be observed, and after parking the car would not start. You may have to resort to repairing the gas pump. Mechanical petrol pumps are less and less common, as they are not efficient enough to meet the needs of injection and diesel vehicles.
Electric gasoline pumps can be submersible (located in the gas tank), and pumping up. Their common function is the same - to provide fuel supply to the intake system.
Gasoline pumps of machines of the old generation are mechanical. Over time, their gaskets dry out and must be replaced. For replacement, only a screwdriver and a repair kit are needed. We remove the fuel pump, rinse it with gasoline (so that the dirt does not clog inside), untwist it and take out all the parts, remembering the order in which they are located. We replace the old parts with new ones from the repair kit. We collect the fuel pump on new gaskets. We carry out the assembly by tightening the bolts crosswise for a uniform clamping force. It happens that the reason is a breakdown of the fuel pump valve. It can be pressed out and replaced. But the part is extremely rare on sale as a spare part, and the replacement is quite difficult, so it is more advisable to buy a new gas pump. Also, a weakened diaphragm spring can serve as the cause of poor operation of the fuel pump at high engine speeds. Its normal length is 47mm. If, when measuring, the length differs from the standard, then the spring must be replaced.
There can be several reasons for the breakdown of the electric gasoline pump: this is a breakdown of the motor, a rupture of gasoline pipes in the body of the gasoline pump, a dirty mesh (internal filter). We remove and disassemble the fuel pump. The internal filter, corrugated pipes and the petrol pump motor can be found at auto dealerships.
Having disassembled the fuel pump, we look at the condition of the conductive rotor plates.If you have experience and a soldering iron, you can replace worn plates by replacing them with new, homemade ones. We grind new plates to perfect condition.
Diy fuel pump repair scheme:
With the replacement of pipes, everything is easier: a new gasoline pipe must be heated in boiling water until the rubber softens and put on the place of the old one.
The motor with the mesh can be changed without problems - we install new ones in place of the old parts, we assemble everything. As a rule, after such manipulations, the gas pump works like new.
The main element of the fuel system of a modern car is the fuel pump, the main function of which is to transfer fuel from the gas tank to the engine. This is one of the most capricious parts of a car, requiring constant monitoring and maintenance. Diagnostics, repair and replacement of the fuel pump can be carried out independently, without resorting to the services of a car service.
The main function of a fuel pump or a gasoline pump is to supply a certain amount of fuel under pressure to the carburetor (carburetor type motors) or to injectors (injection type motors). The fact is that the gas tank is in the back of the car, and the power unit is in the front. Therefore, fuel can flow to the engine only under a certain pressure, which is created by the pump.
The fuel pump starts supplying fuel when the engine starts. Inside the pump, due to the movements of the diaphragm, the inlet valve opens. Gasoline begins to flow, which in the next cycle of movement of the diaphragm through the exhaust valve under pressure is supplied to the engine.
On modern cars, two types of gas pumps are used - mechanical or electric ... The former are used in carburetor engines, the latter in injection engines.
The mechanical pump is usually installed on the body of the gas tank, the electric one is inside the tank. Some car manufacturers use both types of pumps at once.
The mechanical fuel pump has a fairly large size. Its main elements are:
diaphragm return spring;
When power is supplied to the gasoline pump, the lever begins repeated up and down movements. Due to these movements, the diaphragm is displaced, and gasoline enters first into the pump, and then into the engine.
This is how fuel is supplied in carburetor-type engines. Since the distance between the carburetor and the fuel pump is usually small, such devices can supply fuel even at minimal pressure.
Electric petrol pumps are small in size and simple in design. Inside the pump housing are:
diaphragm return spring;
The core of the electric pump is the core. Due to the additional valve, it reciprocates and opens the valves for the inlet and outlet of fuel. Such a pump works only at high fuel pressure in the system and heats up very much while the car is moving. For more efficient cooling, it is usually mounted in a gas tank.
The fuel pump is powered by the power unit. At the moment the engine starts, the on-board computer signals the fuel system to supply fuel. Electricity is supplied from the engine to the fuel pump, and a small motor inside the pump creates the necessary pressure in the system. In the first few seconds after starting the car, you can hear the gas pump humming, pumping gasoline.
A certain amount of fuel enters through the inlet valve into the pump chamber, then through the outlet valve into the fuel filter. There, the fuel is cleaned of dirt and impurities and sent to the engine. The petrol pump turns off automatically, together with the engine.
In vehicles with an injection-type engine, the fuel pump is located inside the gas tank, and in the case of a carburetor engine, under the hood or near the gas tank.On some models, two fuel pumps are installed at once: one on the gas tank, and the other on the engine. The exact location of the pump in your car can be found in the service book or operating manual.
The technology for diagnosing, repairing and replacing a fuel pump is usually not very difficult. If there is a desire, time and a minimum set of tools, all work can be easily performed independently.
In order to remove the fuel pump, it is proposed to perform a series of sequential steps.
Locate the device on the engine that is connected to the fuel supply system.
Disconnect the plug with wires from the fuel pump.
Disconnect the fuel supply hose.
Disconnect the collet and remove the four mounting bolts.
Gently pull the fuel pump out of the socket by hooking it onto the rubber gasket.
Clean the device from oil, dust and dirt.
VIDEO Often the cause of malfunctions in the operation of the gas pump is the gasket. The tightness of the connection between the pump and the engine and, as a consequence, the amount of fuel supplied to the pump depends on the degree of its deterioration.
Replacing the gasket is fairly straightforward.
To replace the rubber gasket on the fuel pump, it is necessary to remove the device and clean the seat itself about adhering dust and dirt.
Remove the fuel pump.
Remove oil and dirt from the pump seat. Lubricate the new gasket with a little gasoline.
Install the gasket into the slot.
Place the fuel pump carefully on the gasket and secure it with bolts.
To replace faulty elements, the fuel pump must be disassembled. The algorithm for disassembling the pump and replacing the filter mesh is not very difficult.
Remove the housing by loosening the retaining clips.
Disconnect the power connectors.
Remove the tubes from the fittings. This can be tricky as the connection uses heat shrinkable materials and the tubing is tightly attached to the fittings. Cut the shrink surface with a knife and remove the tubes.
Unclip the clips to fit the pump diameter.
Remove the mesh.
Remove dirt from the mesh. If there is mechanical damage, replace the mesh with a new one.
Perform all the steps in reverse order.
A complete cleaning of the fuel pump, as a rule, is carried out in a car service. The pump is removed into machines, disassembled, washed with special means, dried by a compressor and assembled.
Gasoline in the fuel system is constantly under high pressure. However, sometimes, due to incorrect operation of the pump, the pressure can drop. In these cases, high pressure in the fuel system is created artificially. This process is called pumping the fuel pump. It is performed in several stages.
Disconnect the hose connecting the fuel pump and engine. To avoid fuel leakage, direct the hose into an empty container.
Rotate the starter without starting the engine. If at the same time the fuel pump has time to pump 0.5 liters of fuel in half a minute, then it is in working order.
To restore high pressure, connect a regular pump to the hose connecting the fuel pump to the gas tank and pump up the system with compressed air.
The fuel pump of the Volvo FH 12 is installed in the gas tank and is a rather complex device. Its replacement is carried out from the car as follows.
Remove the carpet from the trunk floor.
Fold down the rear seat backrest - underneath you will see a small hatch.
Using a 10 wrench, unscrew the five nuts securing the hatch cover and remove the cover.
Disconnect the fuel pipe pieces.
Disconnect the two hoses from the pump, labeling each one first.
For trouble-free operation and increase the resource of the fuel pump, professionals recommend:
refuel only with high-quality fuel;
maintain the maximum fuel level in the tank;
do not use a car with a discharged battery;
timely replace the fuel filter;
use a sporty driving mode less often.
Video (click to play).
Self-diagnosis and replacement of the fuel pump is quite simple. To do this, you just need to carefully follow the recommendations of professionals. The same applies to preventive measures. Refuel with quality gasoline and do not forget to replace the fuel filter in time. Then you will have problems with the gas pump much less often. Good luck on the road!
