DIY nozzle repair

In detail: do-it-yourself nozzle repair from a real master for the site my.housecope.com.

The injection mechanics is the main difference between a diesel engine and a gasoline engine. In a diesel internal combustion engine, fuel is supplied to the combustion chamber using a nozzle. The device injects fuel in a metered manner into a chamber with a high temperature and pressure, after which the diesel fuel ignites. The nozzle is subjected to the greatest load: the part is constantly in an aggressive environment and works at high intensity. Any negative factor can disable the part or significantly reduce its resource, after which the diesel engine nozzles will need to be repaired.

To understand the mechanics of the injector, we will describe the injection cycle schematically:

The injection pump takes fuel from the tank;
then the pump saturates the fuel rail with diesel fuel;
fuel enters the channels that lead to the nozzle;
inside the nozzle, fuel flows to the sprayer;
when the pressure on the atomizer reaches the set threshold, the nozzle opens and diesel fuel enters the combustion chamber.

Let us describe the design of the part using the example of a primitive mechanical nozzle with 1 spring. In the lateral part there is a channel that provides a continuous supply of diesel fuel. Inside the nozzle chamber there is a movable barrier with a spring and a needle, which drops when the pressure rises. The needle rises, clearing the path of fuel to the sprayer.

Additionally, more advanced types of nozzles can be noted:

Piezoelectric: The spring pusher is lowered by a piezoelectric element. This technology provides a high intensity of opening of the atomizer: fuel economy is achieved, while the internal combustion engine operates more smoothly.
Electro-hydraulic: The design includes an inlet and outlet choke and an electromechanical valve. The operating mode of the components is controlled by the engine control unit.
Unit injectors: used in engines that do not have a high-pressure fuel pump. The fuel is supplied directly to the nozzle. These spraying devices have their own plunger pair inside, which generates the pressure required for injection.

Video (click to play).

Due to excessive loads, the injector may fail due to a violation of the operating mode of the motor. Manufacturers declare the resource of parts to be up to 200,000 km, but due to negative operating factors, wear of parts appears much earlier.

Repair of diesel injectors may be required for the following reasons:

Low quality diesel fuel: the scourge of all "diesel operators". Due to impurities in the fuel, the sprayer becomes clogged; the dosage and the fuel supply mode are violated.
Poor assembly quality of the injection component or factory defect: the injector does not withstand the operating conditions, the part as a whole or individual components fail.
Mechanical damage caused by incorrect operation of adjacent ICE systems.

Usually, breakdowns are of the following nature: the spray angle and the amount of supplied fuel change, the integrity of the body is violated, and the needle travel deteriorates.

Let's briefly describe the "symptomatic series":

jerks and jerks are felt when moving;
The internal combustion engine is unstable at idle, stalls;
when the engine is running, an excessive amount of exhaust is emitted;
tangible loss of traction;
failure of individual cylinders;
gray or black smoke from the exhaust pipe.

It is preferable to entrust the routine maintenance or overhaul of diesel engine injectors to qualified specialists - they will be able to restore and adjust the part on high-precision automated stands.However, a certain set of repair procedures can be carried out in artisanal conditions without the use of complex equipment.

To carry out self-service of diesel engine sprayers, the car owner will need:

a set of open-end or spanner wrenches;
screwdrivers for straight and Phillips head;
clean dry rags;
maximeter;
flushing fluid for internal combustion engines.

It is recommended to carry out work in a dry and lighted, dust-free garage.

Diagnostics of diesel injectors and their maintenance involves removing the nozzles from the internal combustion engine. Before starting work, it is recommended to thoroughly wash the engine and engine compartment to avoid the ingress of debris and foreign particles. With particular fondness, you need to rinse the cylinder head. High pressure tubing should be marked with markings to avoid confusion during reassembly.

Before removing it is necessary to close the nozzle fittings (use plastic caps) to avoid contamination. It is not recommended to use ordinary open-end wrenches to dismantle the nozzles - an inexperienced repairman can strip the threads from the nozzles. If the required qualifications are not available, use spanners and a long-handled head tool.

After removing the nozzles from the holes, dry them and remove external dirt with a rag. O-rings are placed in the holes of the nozzles. When repairing injection parts, they are replaced with new ones without fail. Do not allow dirt from the rings to get into the injection system during removal.

There are several methods to check if the sprayer is working properly. The easiest way is to check the injector while the engine is running:

Start the "engine" at idle speed.
Begin to unscrew the nozzles one by one in turn.
If, after removal, the operation of the motor has deteriorated, then the remote nozzle is operational and must be returned to its place.
By the method of elimination, you will find an injector, the dismantling of which will not change the operating mode of the internal combustion engine. This will be the broken device.

You can use a multimeter for diagnostics. In advance, it is necessary to throw off the battery terminals and disconnect the wiring of the injectors, and then "check" every detail with the device. On high resistance injectors, the device values will be in the range of 11 - 17 ohms; at low impedance, the multimeter will show up to 5 ohms.

The defective injector must be inspected. First, we look for leaks in the body of the part. If there are none, proceed to disassembling the part. We fasten the part in a vise and knock out the sprayer with a gentle tap. Next, you need a thorough cleaning: we soak the parts of the nozzle in diesel fuel or solvent to remove carbon deposits. Remove fumes and deposits with a fine steel grater. After completing the cleaning, you need to check the nozzle at the maximum meter. If the optimal injection parameters have been achieved, the device is ready to be installed in the engine.

In other cases, it is necessary to completely replace the atomizer on the defective nozzle. When installing a new part, carefully remove all factory grease, otherwise the device will not work.

Before disassembling the device, mark all parts with a marker to avoid confusion. Be especially careful when marking high pressure hoses. The nozzle is screwed in by hand as far as possible. Further tightening is done with a dynamometer wrench. For tightening values, refer to the motor manual. After installing the injector, evacuate air from the fuel system. On modern cars, it is enough to turn the starter several times for this; or use a manual priming pump (if equipped).

Let's list the main features:

the resource declared by the manufacturer has been developed;
there are breakdowns on the case, other leaks;
burnt out spray nut: if the problem is not eliminated early, the spray itself will become unusable.

Please note that on some engines, after installing a new injector, it is necessary to "tie" it to the engine: make changes to the settings of the control unit.

Self-repair of injectors is a rather forced measure. Such a service in artisanal conditions can bring success only in the case of the highest qualifications of the master. The main problem of garage repairs is the lack of high-precision bench equipment for diagnostics. The repairman cannot objectively assess the effectiveness of the service measures.

If there is an opportunity to contact a service station, do not neglect it: computer equipment and cleaning stands will extend the life of the injectors and save them from potential expensive repairs. The same ultrasonic cleaning can save a motorist from engine problems for several seasons. It is not possible to repair modern Common Rail injection systems in a garage: you need a mandatory fine-tuning of the part by computer.

Use a cleaning fuel additive to avoid costly repairs and replacement parts. They prevent the formation of carbon deposits and the settling of deposits. The use of additives should be systematic, not one-off. Remember, additives are about preventing breakdowns, not fixing them.

Self-repair of gasoline engine injectors
The concept of injector nozzles and the principle of their operation
Why and when to check injectors
We are looking for faults, we make repairs
Diagnostic tool
Checking the power supply to the injectors
Checking the windings
Ramp diagnostics

If you are the owner of a car with an injection engine, then you should know that good injectors are required for high-quality operation of the injection system. You can check the operation of the injectors of the injection engine and troubleshoot their operation on your own, it is not necessary to immediately rush to the service station.

For the metered supply of fuel to the combustion chambers of the engine, injectors are required. In the fuel system, they allow gasoline to be mixed with air. Thus, a combustible mixture is formed, which then ignites.

Injectors are:

• Electromagnetic - the valve monitors the access of fuel and regulates the atomization of the fuel mixture using the electronic engine control unit. There is a valve on the central distribution system in front of the throttle valve.

• Mechanical - do not dose the fuel supply, but only open access to it under pressure.

The principle of operation of the injectors: an electronic sensor analyzes the volume of the pressurized air supply. The information received by the sensor enters the computer unit for further analysis (for example, engine temperature, air temperature). After that, the computer calculates the size of the volume of air in the fuel mixture required so that the output coefficient of performance (efficiency) from the operation of the engine is as high as possible.

If you decide to buy a used car, or you have already driven about 100 thousand km on your car, then you should check the performance of the injectors or replace them.

The injectors (their condition) are affected by the quality of the fuel consumed. If low quality fuel is regularly poured into the tank, then the nozzles will not last long. They will have to be changed earlier than after 100 thousand kilometers.

Symptoms of malfunctioning injectors can be seen. They will tell you about them:

• Unstable engine idling.

• Increased fuel consumption.

• The engine does not start well.

• The exhaust gases have become more toxic.

• At idle, the ignition skips.

• The car picks up worse acceleration (although the gas is squeezed out "to the floor").

• If you notice at least one of the above symptoms, it is worth checking the injector nozzles.

To extend the life of the injectors, it is desirable:

• Fill the tank with only high quality fuel.

• Regularly add various additives to the tank (sold in auto chemistry departments).

• Every 40 thousand km clean the nozzles (because they get clogged).

Before checking the injector nozzles, pay attention to the fuel filter (it must be clean), the gas tank and the fuel pump sieve (they can have blockages and deposits). Such examinations are required after 30 thousand kilometers for preventive purposes. If everything is in order with this part of the fuel system, proceed to check the injectors.

You can go to the service station, where there is a special stand. Liquid is supplied to the nozzles under pressure, and you will be able to see the operation of each sprayer on the stand (what dose of atomization it produces).

To diagnose injectors, use a multimeter or ohmmeter (these are devices for measuring the resistance of injectors). To determine the condition of the injector, it is required to disconnect it from the high voltage wire. Now we check the nozzle with the device. There are nozzles of low and high impedance (the manufacturer's instructions will tell you about the type of nozzle). The resistance should be 2-5 / 12-18 ohms.

At home, you can also check the injector nozzle. This can be done in several ways:

Start the engine. Touch the working nozzle with your hand - it should pulsate. If no jitter is felt, then the injector is out of order. Add revs at idle speed and let the engine run a little. If the cap nuts that hold the injectors are loosened one by one, the engine speed will decrease. If the speed does not change, then the nozzle needs cleaning or replacement.

Do-it-yourself check of petrol injectors is possible if you have a diagnostic tool:

• Machine on-board computer (will help to identify malfunctions in the engine management system).

• Pressure gauge (determines the fuel pressure). Helps to identify problems with the fuel pump pressure regulator, clogged fuel filters.

• Polarity LED on injectors (you can also determine the polarity on the ignition modules and the coil).

• Ohmmeter or multimeter (determines the resistance of the injectors).

If the ignition is on, and one of the injectors in the injector does not work, then it is necessary to check the presence of power on the injectors. To do this, disconnect the wiring block from the inoperative injector. Two ends of the wires must be attached to the battery, and the other side of the wire must touch the contacts of the injector. Now turn on the ignition.

The injector on the injector requires immediate replacement if the resistance on it is higher or lower than 11-15 ohms. This is determined using an ohmmeter.

How to check the resistance on the injector windings?

1. Remove the negative terminal from the battery.

2. Disconnect the connector with wires from the injector.

3. Connect the ohmmeter wires to the injector electrical connector.

4. Compare the ohmmeter readings with the standard ones (this is indicated in the manufacturer's instructions).

You can also check the injector nozzles on the ramp. For this:

1. Remove the ramp together with the injectors.

2. Get her out of the awkward position.

3. Remove the negative terminal.

4. Connect the harness to the rail harness.

5. Replace the minus terminal.

Connect both fuel pipes and use a wrench to tighten the fittings that hold them. Place a container with a measuring scale under each nozzle (there should be 4 containers). Crank the engine with a starter.

Switch off the ignition. When calm, no liquid should leak from the nozzles.

If leaks are noticeable, the fuel injector is leaking and must be replaced. Compare the amount of leaked liquid in the measuring containers. If the amount of leaked liquid is different, then one of the nozzles needs cleaning or replacement.

Remember to inspect the nozzles for defects. If you find something, change the nozzle. Replace the ramp.

During the operation of a diesel engine, the atomization efficiency of the fuel gradually decreases.At a certain stage, it is necessary to repair or change the nozzle atomizer, and sometimes the entire nozzle. All this can be done on your own, without resorting to expensive car service services.

One of the main elements of any fuel system, including Common Rail (CR), is an injector, the main functions of which are:

fuel injection;
sealing between the injection system and the combustion chamber;
saving fuel consumption.

The injector element from which fuel is injected is called the atomizer. Its leading edge is located in the combustion chamber and is constantly subjected to mechanical and thermal stress. When the fuel passes through the nozzle, the sprayer cools, but during long-term operation this may not be enough. Therefore, the nozzle tip is made of high temperature resistant materials. In the CR system, the spray is built into the nozzle - this increases its service life.

In high-pressure fuel pumps (TNVD) in-line multi-plunger, distribution and individual types of sprayers in the nozzle are fixed with a threaded connection. As a result, the nozzle is a single unit.

For in-line multi-plunger, individual and distribution injection pumps, nozzles with threaded nozzles are used

CR fuel systems or unit injectors have integral (modular) atomizers. Pin injectors are installed on engines with distributed combustion chambers, and nozzle nozzles on engines with direct injection.

In the Common Rail system, the atomizers are built into the injectors

In the CR system, injectors are controlled through an electronic control unit (ECU), from which certain signals are sent to the injectors. This is how the CR differs from the mechanical system, where the nozzles open when a certain pressure is reached.

Electro-hydraulic injectors also open when fuel pressure rises. However, the spray needle has a rim that acts as a piston. Fuel is supplied under high pressure both under and above the piston. Since the pressure is the same, the needle is pressed against the seat and the nebulizer is closed. There is a space (channel) above the needle, which is combined with the drain line. A valve (piezoelectric or electromagnetic) is built into this space, which closes the channel during operation.

When a signal is supplied from the ECU, the injector is triggered. The valve opens, the channel becomes free, and the fuel above the needle enters the corresponding line. The result is a pressure difference, and the fuel under the needle lifts the spring that opens the nozzle opening. At this moment, injection occurs. In the absence of a signal from the ECU, the pressure stabilizes and the injector closes.

In good working order, the injector atomizes the fuel in the form of a cloud. If the fuel is supplied in a jet, then the injector is faulty.

During the operation of a diesel car, situations may arise when fuel consumption increases noticeably, engine power decreases up to a complete stop. This is often caused by faulty spray nozzles. It is advisable to carry out repair work in these cases as soon as possible. Image - DIY nozzle repair

Decreased engine power and increased fuel consumption are often caused by a faulty injector nozzle.

The need to replace the nebulizer can be determined by the following signs.

Fuel is supplied in excess volume. It continues to flow into the engine even after the end of the operating cycle. Smudges appear.
The engine runs unstable, does not start well after a long stay and idle speed floats. The reason for this is lack of fuel in the system.
Due to incomplete combustion of fuel, the exhaust becomes black and denser.

As a result, engine power is reduced. In this case, replacement of nozzles is required.

The injectors are usually threaded into the cylinder head. Do not use open-end wrenches to dismantle them. Even if it turns out to remove the nozzles in this way, it will not be possible to install them back - it is impossible to tighten with a wrench with the required force.

The main part of the nozzle body is a hexagon. To remove them, you can use standard sockets for 24 and 27 and a driver. They must be elongated. In addition, you will need a container with fuel for flushing the injectors.

After removing the nozzles, washers and dirt are removed from the nozzle channels. The washers are removed using self-made hooks. After cleaning the channels, be sure to rotate the starter for 10 seconds. This will ensure complete cleaning of the channels from debris. In addition, it is recommended to check the functionality of the glow plugs and the control system.After removing the injectors, their performance is checked according to the following criteria:

when fuel is supplied under a certain pressure, the injector must open;

before the injectors are opened, the fuel should not flow out of the sprayer;

spray should be uniform;

when the fuel supply is cut off, the pressure inside the injector must remain unchanged for some time.

When disassembling the nozzle, it is convenient to use a vice, but you should not use excessive force.

If the nozzles are defective, the protective caps should be put on the nozzles and the area prepared for work. The surface must be clean and level. You will need:

vice;
container with clean fuel;
spanner keys.

Injectors of Japanese cars that have a return flow through the ramp should not be clamped in a vice, since the part may be damaged. The key is fixed in a vice and the nozzle is already placed in it.

Injectors of German engines can be clamped in a vice. In this case, it is not recommended to use open-end wrenches - only socket wrenches and extended heads.

The procedure for replacing the sprayer is as follows.

The union nut is loosened and unscrewed. Sometimes it is removed with the spray. In this case, it is knocked out with any suitable guide, cleaned of dirt and washed.
The intermediate casing is removed and washed in a container with fuel.
The remaining fuel is drained from the injector body.
A new atomizer is removed from the package and rinsed.
The intermediate casing is removed from the container so that dirt particles are removed along with the fuel.
The nozzle is assembled, the nut is tightened.
The injector's performance is checked at the stand.
Before installing the nozzle, the seat is lubricated with graphite grease. Tightening is performed with a force of 6–7 kg-m. You should screw the nozzle into the channel with your hands - it should go easily.

The assembly process does not present any difficulties if the pipes and fittings were marked during disassembly. The high-pressure pipes are flushed with fuel both outside and inside before installation. Once connected, clamps are installed on the tubes to prevent vibration and premature breakage. Air is then removed from the system and the engine is started.

Since the purchase and installation of a new nozzle is fraught with quite serious financial costs, often only the atomizer is replaced. It consists of a body and a needle located inside. During operation, the seating surfaces are deformed, and the sprayer starts to work incorrectly.Sprayer repair is possible in the following cases:

Sticking of the needle in the body due to dirt, deformation, scoring or chipping of the working surfaces.

Dirty spray nozzle.

There are several ways to repair the sprayer. One of them is ultrasonic cleaning, which is used to remove carbon deposits from internal surfaces.However, with a strong coking of the sprayer, complete removal of carbon deposits by this method is impossible. Moreover, ultrasound cannot restore mechanically worn surfaces. Image - DIY nozzle repair

One of the options for repairing a nebulizer is ultrasonic cleaning

Another option for repairing sprayers is lapping with polishing pastes of varying grain size. The disadvantage of this method is the possible violation of the geometry of the relative position of parts. As a result, fuel may leak into the injector from the sprayer. Lapping will not help even in the case of severe mechanical deformation of the surfaces.

The nozzle elements are located in a strictly defined sequence

Lapping is carried out as follows.

The nozzle is clamped in a vice. The nut securing the spray gun is unscrewed.
The needle is washed in a container with fuel, wiped with a clean cloth and blown out with compressed air.
For lapping the needle, use a paste containing an abrasive and a cast iron lapping for finishing. The needle is passed over the lap to remove marks. In this case, the appearance of new damage should be avoided.
With the help of nickel plating, the working volume of the needle is restored.
The body of the atomizer is mechanically processed. It should look sleek and shiny.
The needle is inserted into the body. The gap between the needle and the body should not exceed 1–2 µm. Otherwise, nickel plating should be repeated.

Thus, the repair of the atomizer consists in cleaning from carbon deposits, grinding and building up the volume. This process is quite time consuming. If almost every car owner can replace the nozzle atomizer, then special equipment will be required for self-repair.

In order to avoid errors, the process of lapping nozzles should be considered in more detail. For lapping you will need:

paste GOI;

thick car oil;

drill.

GOI paste is crushed into powder and diluted with oil in a ratio of 1 to 2. Then the composition is applied to the spray gun body, the needle is clamped into the drill, and grinding to the body is performed at the lowest speed. In this case, it is necessary to tap the body with the needle for a minute. The parts are then washed in clean fuel and blown out with a compressor. After that, lapping is carried out only with oil.All elements, including the nozzle itself, are washed in kerosene, purged and assembled. Image - DIY nozzle repair

The seat for the needle in the sprayer body is restored by lapping using special pastes

To increase the life of your sprayer, it is recommended to follow a number of simple but important rules:

refuel only with high-quality fuel at proven gas stations;
change the fuel filter in a timely manner;
use fuel additives that clean the fuel system from water and impurities;
if there are any problems in the engine operation, immediately diagnose it at the service station.

These simple guidelines will help you avoid the costly costs of unscheduled nozzle changes.

The algorithm for replacing injectors on a diesel engine is quite simple. Even an inexperienced motorist can do this. Sprayer repair is more complicated and time consuming. However, if you have the desire and the necessary tools, you can also do it yourself. Refuel with quality fuel, change fuel filters in a timely manner, and problems with injectors will occur much less frequently. Good luck on the road!

Injection gasoline engines have dominated the automotive market. It is impossible to find a new car equipped with a carburetor fuel supply system. Back in the distant 70s of the last century, the first injectors began to appear.

The popularity of the injector is understandable. This type of fuel supply system significantly reduces gasoline consumption and the level of harmful emissions into the environment.The injector is a mechanical device that provides a uniform supply of fuel to the engine combustion chamber.

The operation of the injector is simple and straightforward as everything is ingenious. Everything is tied to the on-board system of the car that regulates everything - from fuel supply to exhaust emissions.

In short, the operation of the injector is as follows:

Fuel is pumped from the tank to the injector;
The solenoid valve injector regulates the level of mixing of fuel with air;
The air-fuel mixture is supplied to the manifold through the solenoid valve. The valve opening time affects the amount of fuel;
The fuel-air mixture is burned in the engine chamber and discharged into the environment through the exhaust system.

The operation of the solenoid valve is very tightly controlled by the car's on-board computer. The flow of fuel into the engine is carried out in portions and verified.

Thus, savings in gasoline consumption are achieved. It is used in the amount necessary to maintain the existing speed limit.

Heavy use of the car, poor fuel quality and irregular filter changes lead to contamination of the injection system over time. It stops functioning properly.

A driver who feels his car will immediately be alerted at the first signs of a malfunction in the operation of this fuel supply system. Ignoring the problem over time can lead to even greater damage to the injector and entail significant material costs.

The following main injector malfunction symptoms :

Decrease in motor power;
Floating idle speed;
Dips when picking up speed;
Increased fuel consumption;
Problems with starting the motor;
The appearance of a warning light on the instrument panel.

If problems in the operation of the car engine begin to haunt the motorist more and more often, then the injection system is contaminated and requires cleaning. If you wish and have enough free time, you can do the injector repair yourself.

Experts generally recommend, without waiting for problems in the operation of the injection system, to carry out preventive cleaning of its nozzles every 30,000 kilometers of the vehicle's run.

This will maintain the optimal level of system performance throughout the entire period of operation of the machine. These actions do not require special qualifications and can be performed in a garage with a glass of tea.

If all other possible causes of the problems encountered in the operation of the motor are excluded, you can safely proceed to cleaning the injection system. Proper preparation and knowledge of theory will allow you to perform the operation quickly and efficiently.
It is necessary to thoroughly clean the dirt in the nozzles that impedes the normal fuel supply.

The following methods can be distinguished for restoring the operability of the injector:

The simplest and therefore the most popular method that does not require special knowledge. A special purifier is added to the fuel, which enters the injector with gasoline and literally dissolves all impurities without a trace

It is removed without a trace along with the exhaust gases. Before using it, experts recommend replacing the fuel filter.

Compared to the first method, it is much more expensive, but more effective. There is no need to disassemble the fuel supply system. Convenient and reliable.

Using this method of injector repair requires the use of special equipment. It is impossible to perform it in a garage. You need to contact a specialized car service for help.

Each driver solves the problem of a malfunction of the injection system individually. If you want to figure out the problem yourself and you don’t mind your free time, you can do everything yourself.Otherwise, welcome to the specialists who, for a certain fee, carry out the repair of the injector.

Thank you for your attention, good luck on the road. Read, comment and ask questions. Subscribe to fresh and interesting articles on the site.

The reliability of the fuel system of any vehicle depends on the injector. Contamination of this mechanism leads to large losses of fuel, unstable idling, twitching of the car during acceleration and a decrease in engine power. In this case, do-it-yourself injector repair is a minimum program, and contacting specialists is a borderline opportunity.

Some gas stations sell low quality fuel containing not only dirt or water, but even benzene, sulfur and olefin. As a result, resinous deposits accumulate on the surfaces of the nozzle.

Real car enthusiasts know that the operation of an injection type engine requires cleaning every 30 thousand km. mileage.

Features of injector faults are in the form:

difficult starting of the engine;
the check engine light on the dashboard;
unstable engine idling;
a tangible decrease in engine power;
increase in fuel consumption.

Injector repair provides for compliance with some rules:

Repair of injectors in this case includes:

Repairing an injector in a garage provides for flushing the injector, but in this case you will have to remove them and use special auto chemistry for cleaning and your own nano inventions.

The reliable operation of the engine depends on the correct functioning of the injectors. Their condition is largely influenced by the quality of the fuel used. High-quality fuel significantly increases the life of the injectors. During normal operation, they are replaced every 100 thousand kilometers.The main reasons that negatively affect the performance of the injectors are their clogging, as well as wear or breakage of some parts that make up their design. For prophylaxis, various additives should be added to the fuel tank, and every 30-40 thousand kilometers, check the filter elements and clean clogged nozzles from dirt and debris. You can do this work yourself or contact the professionals of specialized firms, one of the proven ones isMalfunctioning injectors signal such symptoms:
✔ the engine is unstable at idle;
✔ increased fuel consumption;
✔ Difficulty starting the engine;
✔ poor response when pressing the gas pedal;
✔ exhaust with smoke and increased toxicity.Lower ambient temperatures will exacerbate these symptoms as the volatility of the mixture decreases. Timely flushing will prevent coking of the nozzle spray. For this, special cleaning fluids are used, and the procedure itself can be carried out even at home. This should be done regularly as smaller fuel outlets will reduce engine power and performance.A spanner wrench is used to remove and further disassemble the injectors. This is, firstly, convenient, and secondly, an open-end wrench can damage the union nuts of the injector bodies, and they can crack during disassembly and assembly. On examination, worn parts are identified and replaced.Repairs to the sprayer must be carried out with absolute cleanliness. Before removing injectors from diesel engines and during their disassembly, it is necessary to thoroughly rinse everything. The smallest particles of sand or dust trapped in the channel can damage the threads and impair a reliable seal. After disconnecting the high-pressure tube from the nozzle, it is necessary to close the fitting with a tight and clean cap, this will protect its cavity from dirt.After removing the injector from the gasoline engine, it is imperative to close the holes where they are inserted with clean plugs.There is also a non-disassembly cleaning method using a temporary power system. It consists of an additional fuel pump, a plastic bottle with cleaner and a hose. The fluid is pumped in two stages with a break to dissolve the deposits. The first time the device turns on for 5 minutes, and then for another half hour. The advantage of this method is flushing the entire fuel system, and its simplicity allows you to perform actions in a garage. Of course, not every driver can do it on their own, in this case, you should contact a car repair company.