Do car fuel injectors need to be replaced? How often should the injector be replaced?

When the fuel injector fails, it will lead to an increase in carbon deposition in the engine, unstable idling, increased fuel consumption, weak acceleration, difficult starting, excessive emissions, etc., and in serious cases, it will cause the fuel injector to be blocked, and then damage the engine.

The injector is a simple solenoid valve. When the solenoid coil is energized, a suction force is generated, the needle valve is sucked up, and the nozzle hole is opened. The fuel is sprayed at high speed through the annular gap between the shaft needle and the nozzle hole at the head of the needle valve, forming a mist, which is conducive to full combustion.

As one of the key components of the EFI engine, the fuel injector will seriously affect the performance of the engine.

The reason for the blockage is that the carbon deposits in the engine are deposited on the injector, or the impurities in the fuel block the injector channel, and the injector is blocked, pay attention to the following points;

First, don't coax the throttle with a big foot, especially if the fuel injector is blocked, which will cause the fuel injector to be completely damaged.

Second, the fault light is not good for a long time, and the fault light will be reported after a certain number of times, indicating that the car is not burning well before, which may be oil or oil deterioration and there is no good fuel to burn.

Third, in the case that the oil circuit is not cleaned and improved, cleaning the throttle will lead to increased air intake, thinning of the mixer, and the vehicle will shake at idle, and the throttle will be channeled.

Fourth, repairing a car does not mean that it will be good, and repairing it may aggravate problems in other places. This is normal and requires the use of elimination.

Fifth, in the case of poor combustion, shaking, and scurrying, the first thing to clean the oil circuit is, and not to rush to replace the accessories.

This is very easy to deal with, encounter such a fault code, after the detection, it has been determined that the fuel injector is blocked, then the traditional way is to disassemble the fuel injector to replace, not to mention the replacement of the labor costs, we will say the reason for this, we have to first figure out why it will be blocked, will be after the replacement, to avoid the later blockage, after all, the replacement cost is very high, you replace the plug again, is it to consume a lot of cost.

There are two types of blockage, one is the external blockage caused by ash and carbon deposits on the outside of the fuel injector in the combustion chamber, and the other is the internal blockage caused by the oil in the oil circuit. Both of these blockages can be cleaned and unblocked by PNF-based additives. But be sure to use effective additives.

Don't wait for the car to have a problem before thinking about changing the parts, the cost outweighs the loss.

Fuel injectors. It does not need to be replaced, and the injector can be cleaned once.

Under normal circumstances, the fuel injector does not need to be replaced, and even if there is a carbon blockage, it only needs to be cleaned normally.

The fuel injector is actually a solenoid valve, in which the electromagnetic energized, the suction generated will make the needle valve be sucked up, open the nozzle hole, and the fuel will be sprayed out at high speed through the annular gap between the shaft needle and the nozzle hole at the head of the needle valve, forming a mist, which is conducive to full combustion.

1. The diesel fuel is not clean, and there are impurities in the high-pressure oil pipe, so that the needle valve parts are not closed strictly, and the high-pressure gas in the combustion room is reversed, and the needle valve parts are burned out. In addition, the dirt on the injector pressure regulating spring, tappet and other parts is moved to the upper part of the injector needle valve through the injector tappet, or the cotton rope and lead wire used to prevent oil leakage on the oil road enter the injector through the high-pressure oil pipe, which will make the needle valve couplet stuck.

2. The machine temperature is too high, and the injector is poorly cooled, resulting in the oil outlet valve being stuck. The engine will overheat due to the late oil supply time, excessive scale or blockage of the cooling water channel, wear of the end face of the water pump impeller, and long-term overload of the engine.

3. The oil outlet valve is worn, so that the injector stops injecting oil when the oil dripping phenomenon, so that the fuel injector burns coke and deposits, and the fault of jamming occurs.

4. When the injector is installed, the leakage of the gasket or the gasket is damaged, resulting in air leakage, causing the local temperature of the injector to be too high and stuck.

5. The fuel injection pressure is too low, resulting in the high-pressure gas in the combustion chamber channeling;

6. Reasons for parts manufacturing, such as the injector mounting hole on the cylinder head and the injector are too tight, the gap between the needle valve body and the mounting hole on the cylinder head is too small, and the mounting hole of the cylinder head injector is too deep.

For timing belt assemblies do not include belt tensioners, but when the timing belt is replaced, the tensioners need to be replaced at the same time. For other belts, it is necessary to inspect them, and if cracks or aging are found, they need to be replaced. For the maintenance of the vehicle and the cleaning of the throttle, it is generally to avoid the phenomenon that the engine is unstable at idling, the engine is turned off and the cold car is not easy to start.

The fuel injector is cleaned for fuel economy and idle fluctuations. The cleaning of the three-way catalytic converter is based on the current three-way catalytic converter product nature and maintenance positioning, in order to restore the performance of the three-way catalytic converter, such as manganese salt compounds and particle blockage after gasoline combustion. According to the fuel quality and road conditions in Beijing, it is generally recommended to clean the throttle and fuel injector every 20,000 kilometers, and maintain some three-way catalytic converters every 460,000.

To sum up, I hope the above brief analysis of the above questions can help you.

When the solenoid coil is energized, the suction is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel is sprayed out at high speed through the annular gap between the shaft needle and the nozzle hole at the head of the needle valve, forming a mist shape, which is conducive to full combustion. In the past, the fuel injector used in diesel engines was mechanically controlled, and the mechanical diesel nozzle was realized by controlling the precision parts (needle valve, needle valve body). The coupling of the nozzle is one of the three precision coupling parts of the traditional diesel engine

Plunger, plunger sleeve, needle valve, needle valve body, oil outlet valve, oil outlet valve seat. The nozzle of the gasoline engine is a part of the electric control system of the gasoline engine, which replaces the carburetor of the carburetor type gasoline engine. The main nozzles used in automobiles are:

Diesel nozzles, gasoline nozzles, natural gas nozzles, etc., now some foreign manufacturers can manufacture special nozzles for hydrogen.

Generally speaking, if the car is in good condition and the oil quality is good, it can be carried out every 4-60,000 kilometers. Even if the injector is slightly clogged, don't be too nervous, because impurities can be sprayed away and dissolved when accelerating at high gear. That's why it's recommended that car owners should often run at high speeds when driving on a daily basis to reduce the possibility of carbon deposits.

How often should the injector be replaced?

If the vehicle is in very good condition, the maintenance interval of the injector can be extended, but it can not be left cleaned, and it can be extended to 40,000 kilometers for cleaning. Because the fuel contains gum and some impurities, it will have an impact on the fuel supply system for a long time.

The fuel injector does not need to be replaced normally, even if there is a carbon blockage, it only needs to be cleaned.

According to the condition of the vehicle and the quality of the fuel usually added, generally speaking, it is now recommended to clean about 2 30,000 km. The vehicle is in good condition and the fuel can be extended to about 460,000 km. When the fuel injector is slightly blocked, it also has a certain impact on the condition of the vehicle.

The role of injector cleaning

The environment where the nozzle is located is easy to generate carbon deposits, and some carbon deposits will adhere to the nozzle head, causing the nozzle to be blocked or the nozzle is not closed tightly, sometimes affecting the injection angle, resulting in poor gasoline atomization. When this happens, the quality of the mixture is affected, and as a result, more carbon deposits are created, which becomes a vicious circle.

This plays a fundamental role in the power play of the engine. Due to poor fuel, the fuel injector does not work well, which makes the carbon deposit in the cylinder serious; The cylinder barrel and piston ring are worn at an accelerated pace, resulting in unstable idling, rising fuel consumption, weak acceleration, difficult starting and excessive emissions, which will completely block the fuel injector and damage the engine.

If the vehicle starts or drives without abnormality, then there is no need to replace itMajor maintenance(four years or 60,000 kilometers) can clean the fuel injector and intake manifold.

Slight blockage of the fuel injector will cause difficulty in starting the cold car, insufficient fuel atomization, weak acceleration, and increased fuel consumption.

If the injector valve is not closed tightly, it will be difficult to start the cold car, the mixture will be too thick, the exhaust smoke will be inadequate, the acceleration will be weak, and the fuel consumption will increase.

Hello, this is not a replacement cycle, just say that there is a fault and then replace, no performance failure is always used.

Hello Master! My car is six years old, the engine has a fault light, I took it to the car shop for testing, and said that the 1 cylinder is not working, and the fuel injector is blocked, I said that it is okay to clean it? The car shop said that the fuel injector cannot be cleaned now, and it is recommended to replace it. Master, is it time to replace?

Question: The complete blockage has not been reached, but the oil output is insufficient, and the carbon remover is also added in this case, but the effect is not good, and the engine fault light has been on, in this case, is it also replaced?

Ask questions! Thank you, master!

There is no fault that does not need to be replaced, it needs to be cleaned regularly, generally 2-30,000 kilometers to clean once, and the fuel injector of direct injection needs to be maintained, so as to ensure normal operation and no damage.

If the injector hole is clogged or the seal is poor, the injector needs to be replaced. The nozzle hole is blocked, and it can be dredged with a needle, and it should be carefully cleaned after dredging. The large plane of the needle valve body is in poor contact with the plane of the main body of the fuel injector, or the cylindrical surface of the needle valve is worn greatly.

If the large plane of the needle valve body is in poor contact with the plane of the main body of the fuel injector, chromium oxide can be coated on the flat plate for "8" shaped grinding; If the cylindrical surface of the needle valve is worn large, the needle valve couples should be replaced in pairs.

When the fuel injector is slightly blocked, it also has a certain impact on the condition of the vehicle. Sometimes there will be such a fault: hang a gear, start, the car is a little shaky, wait for the high-end, acceleration, such a phenomenon disappears, assuming that the various sensors on the car are working normally, the throttle valve has also been cleaned, and the circuit is normal, it is likely that the fuel injector is slightly blocked.

Can't save fuel, bad fuel injector may cause lack of cylinder, car is not energetic, body, car if fuel is expensive, check and check others, such as computer, exhaust sensor, etc.

1. First remove the engine guard.

2. Remove the air intake pipe.

3. Unplug the power supply plugs of the 4 fuel injectors, press the clip on the interface, and you can unplug them, pay attention to not use brute force, and unplug the throttle and idle motor at the same time.

4. There are two screws fixed in the fuel injector assembly bracket, and the left and right screws of the fuel injector assembly are unscrewed.

1. First of all, remove the 2 screws that fix the oil rail. 2. Remove the air intake pipe. 3. Unplug the power supply terminals of the 4 fuel injectors, press the clip on the interface, and you can unplug them, pay attention to not use brute force, and unplug the throttle and idle motor at the same time.

4. Drop a few drops of lubricating oil at the interface between the fuel injector and the engine in advance, and pull it out with a lot of effort. 5. Break the iron clip that fixes the fuel injector to remove the clamp. 6. Then unplug the fuel injector, also drop a few drops of lubricating oil at the interface between the fuel injector and the oil rail in advance, and pull out the fuel injector by gently moving a few times.

7. When pulling out the fuel injector, connect a container underneath, and half a cup of gasoline will flow out.

Hello dear! When removing the fuel injector, first of all, you need to remove the fuel guide rail, remove the injector, clean the inlet and outlet carbon deposits of the injector with carburetor cleaning agent, and then add 12V voltage to the injector, connect the thin tube of the carburetor cleaning agent at the inlet of the injector, too thin can be wrapped with black tape to thicken, one person holds it with both hands to ensure that the carburetor cleaner and the inlet of the injector do not leak oil, and the other person starts the 12V power supply to make the cleaning agent spray out intermittently, until the oil mist sprayed by the injector is fine and uniform.

Don't mess around, change the three filters frequently, and it's no problem.

Random change of the original car*** You have to change the accessories, no problem There is also a problem. Unless burned out.

Messy cleaning, no card valve You have no problem when you clear it, you have diluted the solidified oil.

The replacement cycle of the car fuel injector is 3-5 kilometers.

It is recommended to clean the fuel injector once in 2-30,000 km. At the same time, if you often use oil with poor quality, the cycle of replacing the fuel injector will be shortened, in order to keep the car in good power, it is recommended that you regularly clean the carbon deposits on the fuel injector. In addition, the work of the injector of the automobile engine plays a fundamental role in the power of the engine.

Such as unstable idling, increased fuel consumption, weak acceleration, difficulty in starting and excessive emissions. Whether the working condition of the fuel injector is good or not depends on the quality of the oil added by the car owners, if the oil quality is poor, it will lead to the blockage of the fuel injector and serious carbon deposits. Therefore, it is necessary to clean the fuel injector regularly, such as not cleaning for a long time or cleaning the nozzle frequently will cause bad effects; Severe cases will require the replacement of the entire injector mechanism.

How can I tell if an injector needs to be replaced?

If the engine shakes, it may be that the fuel injector is damaged, resulting in poor fuel injection, and the owner needs to replace the fuel injector in time. If the fuel injector is damaged, the vehicle will shake violently. The situation that the exhaust of the car emits black smoke is also the standard for the damage of the fuel injector, because the fuel injector cannot work normally, the combustible gas will not be completely mixed, which will lead to serious vehicle exhaust.

If the fuel injector of the car has poor oil supply, insufficient elasticity, and piston wear, change the fuel injector.

Poor sealing of the needle valve and needle valve body causes poor atomization of the fuel injector or oil dripping. This fault can be applied to the sealing tape at the end of the needle valve with fine chromium oxide or toothpaste, but never applied to the cylindrical part, insert the needle valve into the needle valve body, and turn it while knocking until it is sealed. Chromium oxide or toothpaste must be washed off after grinding.

The fuel injector itself is a solenoid valve, the principle is very simple, when the solenoid coil is energized, the suction is generated, the needle valve is sucked up, the nozzle hole is opened, and the fuel is sprayed out at high speed through the annular gap between the shaft needle and the nozzle hole at the head of the needle valve, forming a mist shape, which is conducive to full combustion.