Many car owners know that one of the main elements of the injection system is the nozzle. The holes through which the fuel is supplied gradually become clogged. The fuel mass during combustion forms a plaque on the injector and engine. As a result, the nozzles become clogged. Through clogged openings, fuel is not correctly supplied. It is simply not enough. The air mass is not homogeneous, and liquid fuel enters the engine. This greatly degrades the performance of the vehicle. But how to clean the nozzles on the injector?
Pollution stages
Before answering the question of how to clean the nozzles, it is worthwhile to figure out what stages of pollution occur and how this affects the operation of the vehicle.
An injector is an important element in the system. There are three stages of pollution:
- Small. In general, the car’s engine is operating normally. However, increased fuel consumption: about 2 liters per 100 km. Injector performance also drops by 5–9%.
- Average. In this case, the engine starts to malfunction, fuel consumption increases significantly, exhausts become uneven. In this case, the productivity of the injector can drop up to 20%. Due to improper exhaust, an unpleasant odor may appear in the passenger compartment.
- Strong. The engine starts to work poorly and simply tries to "jump out" from under the hood. In this case, several cylinders at idle may not function at all. In the air filter, or rather in its housing, when a sharp pressure on the gas pops. In this case, the productivity of the injector is reduced by 50%.
Cleaning methods
The injector nozzles get dirty regularly, and this is inevitable. Therefore, they must be periodically cleaned. Usually a similar procedure is carried out after a run of 30 thousand kilometers. This saves the performance of vehicle systems. If you do not know how to clean the nozzles on the VAZ and other models, then it is worth contacting specialists.
There are currently several methods:
- flushing liquid nozzles;
- ultrasonic flushing.
Fluid application
So, how to clean the nozzles yourself? When flushing with a liquid, the injector is not removed from the engine. To carry out such a procedure requires a special apparatus. With its help, liquid is supplied to the nozzles. By the principle of operation, such an assembly resembles a fuel pump. However, instead of fuel, a reagent is supplied. In order to avoid undesirable consequences, the fuel supply systems should be completely turned off . The nozzle cleaning fluid is capable of exfoliating tar deposits from the injector, the walls of the combustion chamber and the valve. To remove all plaque from the injection system, a continuous supply of reagent is required. The procedure takes about 30 minutes. In this case, the pressure should be from 2 to 4 atmospheres.
Features of the procedure
Since not everyone can clean the nozzles, care must be taken. To prevent liquid from entering the gas tank, it is recommended to completely turn off the fuel supply system. After all, the reagent dissolves almost any deposits. Their accumulation in the gas tank can cause blockage of the fuel pump intake grid, as well as the fuel filter when fuel is supplied to the engine. As a result, ultrasonic cleaning of the injector may be required . In this case, the fuel pump will have to be replaced.
What equipment is required
The nozzles are cleaned, the price of which depends on several factors, by feeding the reagent into the system. In specialized services, a special apparatus is used. At home, almost no one uses it, since such an unit is not cheap. There is simply no point in buying a device.
For washing nozzles at home, you can use a device assembled from improvised materials. The unit will be a simplified version. To prevent reagent from entering the gas tank during the procedure, it is recommended that the injector be removed from under the ramp.
What is required
To carry out the procedure at home, it is worth preparing:
- Flushing fluid - 2 cylinders.
- Hose length from 10 to 15 cm.
- Clamp - 2 pcs.
- You will need a knife to work with wires and a hose.
- 12 volt light bulb.
- Button for 2 contacts, but without locking.
- Charger, preferably 12 volts. This is enough to open the nozzles.
- A set of tools for extracting nozzles.
How to wash nozzles at home
First, disconnect the “-” wire from the battery, and then remove the nozzles. To do this, remove the corrugation, throttle assembly and manifold from the air filter. After that, from the BDZ you need to disconnect the cable of the gearbox and the accelerator, the heating hose of the BDZ and breather, as well as all other hoses that go to the injector, and nozzle chips. As a result of the manipulations, the ramp will be noticeable.
The parsing process does not end there. To prevent fuel from entering the ramp, it is necessary to unscrew the fuel supply return line located near the power steering tank. It's not hard. The return line is attached to the ramp with two bolts, as well as from the side with one bolt with two washers. When carrying out all the manipulations, it is recommended to lay a fabric on which the remaining fuel will drain. Now it is worth twisting the three bolts on which the ramp rests. Raising it, you can remove the nozzle.
Rinsing system assembly
Since it is impossible to wash the nozzles without a special system, it is necessary to assemble it. To do this, take a reagent bottle and fix a piece of hose to its cap, fixing it with clamps. The injector outlet should be placed in a plastic container, the volume of which is 1.5-2 liters. The reagent will flow here. The insulation on the charger should be cut, and then connect the red wire “+” using the terminal with the button, and the wire “-” must be fixed with the terminals to the nozzle contact.
Now you need to turn on the 12 volt bulb in the circuit. This is required so that during operation of the system the winding on the nozzle does not burn out. With the bulb, you need to connect the second contact of the part, and attach the second wire to the button. To check the operation of the circuit, you must turn on the charger. In this case, the light should come on and a click should sound, which indicates the opening of the nozzles.
Flushing process
So, how to clean the nozzles yourself? If the circuit works, then you can begin to remove contaminants. To do this, create pressure in the hose. It is enough to press the button of the cylinder with the reagent, while releasing a small amount of liquid into the hose and the closed nozzle.
In this case, care must be taken. The hose on the cylinder cover must be tightly fixed. Otherwise, overpressure may compromise the integrity of the system. After this, it is necessary to simulate the opening of the nozzle by pressing the button in the chain. As a result of this, the injector must release a stream of liquid cone-shaped in a plastic container. The process must be repeated until the system is completely clean. The same should be done with each nozzle.
In conclusion, it is worth replacing the sealing rings at the ends of the parts. After flushing, the injector can be returned to its place and all hoses and wires fixed. How much does a nozzle cleaning cost? The price for such a procedure in the cabin is from 1000 to 2500 rubles. At home, the costs are negligible: 2 bottles of liquid.
Reagent selection
The nozzle cleaning fluid should be selected carefully. Indeed, much depends on the reagent. Among the most popular brands of such liquids are:
- LIQUI MOLLY is a universal compound that is suitable for almost every vehicle. Such a liquid cleanses gently. However, the drug is not able to remove carbon deposits from the valves of the motor. It can be used at home.
- Carbon Clean - a tool that allows for high-quality, but gentle cleaning.
- Wynn's is a very caustic product that can remove any soot as well as tar deposits. Such a liquid is suitable for vehicles that have been produced since 2003. However, experts recommend that before buying make sure that the reagent is exactly suitable for your machine.
- "Laurel" - this tool is an analogue of Wynn's, but its cost will be much higher. Such a liquid is rarely used.
Ultrasonic cleaning
This method is the second most effective. The nozzles are cleaned in this case only with the help of special devices. Such equipment allows not only to flush nozzles, but also to carry out diagnostics. During cleaning, the injector is completely removed from under the ramp, and then lowered into a container with a special solution.
The bath, where the part is located, is affected by ultrasound. Thanks to this, the surface of all nozzles is mechanically cleaned. This removes pollution from several injectors at once. The first stage is carried out in a sparing mode. After that, a check is carried out by simulating fuel injection. In this case, the spray quality is evaluated. When choosing a method for cleaning nozzles, it is worth considering that the injector can be made of fragile alloy. When sonicated, the part may be severely damaged. Therefore, experts recommend carefully selecting the power of exposure. In this case, it is worth starting with the smallest, gradually increasing it.
Ultrasound at home
For such cleaning, you will need:
- Hot water.
- Laundry detergent, but not bleaching.
- Ultrasonic machine.
- Capacity for nozzles.
To begin with, it is worth removing the injector from under the ramp as described in the previous method. Pour water into the container and then pour the powder. An ultrasonic machine and nozzles must be placed in the liquid. Now you need to start a normal wash cycle. After half an hour, it is recommended to change the water.
Cleaning should be continued until the smell of fuel is almost completely gone. On average, the process lasts about 5 hours. In conclusion, it is worth changing the gaskets, checking the operation of the injector, and then returning the part to its place.
Which flushing method is better?
So, how to clean the nozzles at home? Which method is better? As practice shows, the best way to remove carbon deposits is to flush the injector with a special liquid. If the nozzles are not very dirty, then you can clean them with ultrasound. It is worth noting that the latter option is much cheaper if you go to a car wash. Ultrasonic cleaning of the injector is usually 300 rubles.