Often drivers are interested in why the engine speed does not fall at idle. This situation is quite common, and neither carburetor engines nor more modern injectors are immune from this. True, the causes of the malfunction will be different for them. But, in practice, everything can be diagnosed independently, and also on almost all car models, the problem can be fixed by hand without much difficulty. The most important thing here is to correctly diagnose, this will significantly speed up the repair process, and save you from additional problems and difficulties.
What it is?
Why does the engine speed not drop at idle? To begin with, let's decide how to understand that a problem has arisen, and also see what it can lead to. Even an inexperienced motorist can determine the increase in idle speed. This is easy to hear. With an increase in speed, an increase in the noise of a running engine with the gas pedal released is observed. Also on machines equipped with a tachometer, you can trace the increase in speed on the device. On almost all models of passenger cars, idle speeds fluctuate within 650-950 rpm(specify the indicator in the data sheet of your car), everything above is considered a deviation from the norm. Also on many injectors, this problem causes the inclusion of a “check” on the panel.
In any case, the problem should be fixed as soon as possible. Increased speed is the reason for the increase in fuel consumption. This increases the cost of refueling. Also, an increase in speed significantly accelerates engine wear. So it is not advisable to delay the solution of this problem. This way you save a lot of money. When identifying and eliminating the cause of high speeds, it should be remembered that on carburetors and injectors, the problem can be caused by various malfunctions.
carburetors
First, let's deal with the problem on carbureted engines. This type of food is considered obsolete, but many cars on the roads are still equipped this way. Also, many motorists, for their own ideological reasons, use such motors, and are not going to refuse them. Diagnosing the source of the problem here is quite difficult, and this is given the small list of elements that cause an increase in speed. Let's look at what you should pay attention to:
- Seizure of the needle valve. In this case, the fuel enters the chamber is not metered. Moreover, depending on the location in which the valve is stuck, idle speed can both disappear and vice versa increase;
- Violation of regulation idle systems. This usually happens after cleaning or repairing the carburetor. To avoid problems, you should correctly set the ratio of fuel and air supply. If you have not previously produced, then it is better to read how this is done exactly on your version;
- Closing problem. There may be several reasons for such a malfunction. Most often, the damper does not close due to the presence of soot on it. In this case, you will need to clean up this node. Usually, this helps. In some cases, the throttle valve may be damaged. Then you will need to change this part, but not all carburetors have this feature;
- Sometimes, the problem can manifest itself when, this happens quite rarely. But it's still better to check. To do this, with the engine running, open the radiator cap, with a burnt gasket, white smoke will come out of the neck. In this case, you will need to change the gasket;
- Open suction. Check how the damper works in the primary chamber. If a problem is identified, then it makes sense to see how the suction works. Most often, to fix the problem, it turns out to be enough to simply lubricate the cable and damper actuator.
Injector
On engines that are equipped with injectors, there are more possible reasons for increased speed. In particular, the problem can be caused by both mechanical failures and failure of electronic sensors. But, unlike simpler carburetors, it is simplified by the presence of an on-board computer that is able to read errors. So, consider the reasons for the increase in speed on the injectors:
- Refusal . If this sensor breaks down, the power unit starts to work non-stop in the warm-up mode, that is, the speed is not reset. The control unit considers that the optimum operating temperature has not yet been reached and tries to heat up the unit. Such a malfunction is fraught with engine overheating and costly repairs. The easiest way to identify this problem is with the help of computer diagnostics;
- Work disruption. Sometimes, the cause is the mass air flow sensor. Again, they make diagnostics, after which they check suspicious sensors with a multimeter. An additional check is required to rule out a broken wiring. If necessary, faulty sensors are changed;
- there may be a stuck throttle cable. Check if it works. If a malfunction is detected, it is recommended to try to lubricate the cable and develop it. If it does not help, then you will have to replace the part completely;
- The damper return spring has jumped off, or the damper return spring has stretched too much. This problem is also typical for older cars. Put the spring in place. If it is stretched, then you will need to buy an injection repair kit;
- . In this case, it sends an open throttle signal to the engine control unit, in turn, the “brains” of the car provide more revolutions than is actually needed. The cause of the failure may be a simple jamming of the part, or burnout of the resistance. In the latter case, only the option of replacing the sensor is possible;
- The last reason to check is integrity. injector seals. The check will require a fairly serious intervention in the injector, therefore, this reason is checked last, although this phenomenon is not the rarest. If the gaskets are damaged, excess air enters the combustion chambers, which causes an increase in engine speed.
Conclusion. Every motorist has encountered problems with the operation of the power system at least once. Therefore, such a question, why the engine idle speed does not fall, is not surprising. Unfortunately, it is almost impossible to answer it unambiguously. There are many reasons for this behavior of the car. To identify and fix the breakdown, you will have to conduct a detailed diagnosis.
The owners of front-wheel drive VAZs have enough troubles for the entire period of operation of the car. One of the most bothersome is high idle, moreover, on an already warm car. This problem usually causes annoyance, because the reasons for its occurrence are too many, and finding them is not easy.
Let's list them.
- The most basic is a malfunction or failure of the mass air flow sensor.
- It is not uncommon for the idle control valve to fail.
- The crankshaft position sensor, which gives incorrect information to the control unit, can also become the root of high or floating idle.
- The throttle position sensor could also be the culprit.
- It happens that for some reason the gas pedal does not return back to the end. Moreover, this happens both because of a banal malfunction of the cable, and because of a completely ridiculous one - for example, after washing the car, they laid the driver’s mat in such a way that the tip of the mat began to touch the pedal.
- The air filter is heavily clogged. Because of this, the combustion mixture is too enriched with gasoline, again there are high revs during idling.
- Throttle cable came loose.
- Malfunction of the engine temperature sensor. It gives the "brains" of the car the wrong values, they increase the speed of the crankshaft, thinking that the engine is cold.
As you can see, we have a whole forest of various reasons why high speeds appear! Next, we will take a closer look at the most characteristic, plus the most common problems associated with the described problem. At the same time, we will figure out how to eliminate them with our own hands.
Ways to eliminate the "sore"
If such a nuisance happened, you need to analytically look for which node is to blame, checking all the indicated sensors.
To begin with, consider the following option to correct the problem situation. Suppose high speeds were found at the VAZ 2110. Inspection of the suspected components for malfunction showed that the throttle position sensor has traces of rust. It is located directly above the throttle valve. Measurements with a voltmeter showed that when the motor is idling, the voltage on it remains high - which means that it does not close the damper.
How to troubleshoot? To do this, we only need a screwdriver. Let's start the procedure.
- Having disconnected the terminal block, as well as unscrewing the two screws, we dismantle the assembly.
- We notice that traces of rust inside interfere with the wheel that regulates the position of the damper.
- We fill the insides of the defective device with a penetrating aerosol against rust.
- Scroll the wheel with a screwdriver for development.
- We assemble in the reverse order.
Check if the idle speed of the engine is now high. The problem should be fixed.
Now let's consider another case. Let's say we have high idle speeds in the VAZ 2114. Here's what we do when faced with this situation.
When clarifying the circumstances of the problem under study, we first always check the operation of the idle speed sensor. This device consists of a needle embedded inside an electromagnetic coil. The needle either moves inside the coil, moving away from the opening of the throttle pipe, or extends, closing this opening, thereby stopping the air supply for combustion of the mixture.
Also read about and.
This element is located at the throttle, opposite the gas pedal cable. To diagnose it, we pull out the terminal block from it, start the car, after which we see that we still have high engine speeds at idle. Then we remove this defective unit, then we clean it or replace it. For work we take:
- screwdriver
- toothbrush;
- petrol.
Begin.
- Unscrew two screws. We get the broken knot.
- We connect the wiring to it. We turn on the ignition. If the needle of the device moves slightly inside the coil to the touch, then it is working.
- If the needle does not respond when an electric current is applied, wash the device with a toothbrush with gasoline.
- Assembly is done in reverse order.
When it is not possible to restore the performance of this node with your own hands, it is better to purchase a new one. Moreover, the cost of spare parts is low.
Other fixes
Of course, the options considered do not exhaust the possible ways to correct the shortcoming when high speeds are noticed precisely on a warm engine. To further study the most common situations, we will analyze the case of a malfunction of the mass air flow sensor. 
This device is responsible for supplying the correct portions of air for the combustion of the mixture, and also provides data to the electronic control unit about these portions so that the unit measures the supplied portions of gasoline.
This node can be diagnosed as follows. It is necessary to disconnect the terminal block from our mass flow controller, and then start the engine, after which it is necessary to drive at crankshaft speeds above 2000 rpm.
At the same time, emergency mode is automatically started, portions of the mixture are now calculated only by the position of the damper. If the sensations showed that the car with the sensor turned off became more dynamic than with the one connected, then the malfunction of this unit is obvious. 
To replace it, we take the following tools:
- Phillips screwdriver;
- flat screwdriver.
We are starting repairs.
- After turning off the engine, disconnect the wires from the mass air flow sensor.
- After loosening the clamp, remove the hose on the intake pipe.
- We dismantle the defective device by unscrewing two bolts.
- We are replacing the device.
- We do the assembly, moving backwards point by point.
This is how this cause of high turnover is eliminated.
For some reason it didn't work
Now let's look at another situation. The car owner changed, for example, the idle speed sensor, while the crankshaft speed became high, or still remained elevated anyway.
The reasons for this unpleasant phenomenon may be as follows.
- Most likely, the motorist did the replacement just like that, at random, maybe it will stop turning too fast. The real state of affairs suggests that the malfunction must be sought elsewhere.
- If this sensor is not a completely new sample, it has an adjusting bolt, it may be necessary to tighten it in order to adjust the problem node. Modern idle valves do not require any additional adjustment when installed. However, for example, if Priora has high idle speeds, then this car can look for an adjusting screw.
- It is possible that the new part turned out to be defective.
- New part installed incorrectly.
Here, perhaps, all the roots of the phenomenon are listed.
Let's talk about cost
Not everyone can afford this type of repair, like even reinstalling a sensor. Although the main difficulties are caused not so much by the replacement of one of the sensors involved in the process, but by the diagnosis of the sources of overestimation of the crankshaft speed when idling. After all, we found that the search for the causes of this disease is complicated by their diversity.
If the motorist decides to turn to the service station masters with a request to find the cause of the high engine speeds produced at idle, then the cost of diagnostics in large cities of the Russian Federation will be as follows.
| City | Price |
| Moscow | 700 rub. |
| St. Petersburg | 650 rub. |
| Yekaterinburg | 500 rub. |
| Samara | 500 rub. |
| Krasnodar | 550 rub. |
Since the price of manipulation is low, if the car owner doubts the success of his own diagnostics, he can safely contact the service station.
In the course of the article, we considered the main options for solving a common problem. Now, if a motorist encounters an overestimated idle speed, he will already know what to do.
Now read about and.
It is very important that the engine runs correctly in any mode, including idling. However, many car owners are faced with a problem: when the gas is released, the engine speed is not reset. As soon as such a defect is discovered, it is necessary to immediately find out the cause and eliminate the malfunction for the smooth operation of the car. Also, the engine can slow down for a long time, which also does not contribute to proper operation.
Usually, upon reaching operating temperature, the speed should drop to its norm. The manufacturer indicates the indicators for each specific vehicle model in the instruction manual. They may vary slightly depending on the mileage and the general condition of the car, but usually stay in the range of 650-1000 rpm.
In some cases, the speed drops very slowly or even stays at the same level of 1500-2000 rpm. In this mode, not only increases fuel consumption, which affects the finances of the driver, but also contributes to engine wear.
The cause of idle failure must be diagnosed by qualified technicians. However, to independently understand why the engine speed does not fall.
Malfunctions in the carburetor system
When releasing gas, the drop in speed can go badly on both injectors and carburetor systems.
If the car has a carburetor, then there may be several defects.
Most often, the speed is not reset due to a faulty throttle. When the engine warms up, it is in the open position to allow more air into the system. Then it closes and the speed should drop.
A throttle valve that is not completely closed leads to the fact that, upon reaching operating temperature, an over-rich mixture is still supplied, and the speed remains at the same level. If this part is heavily soiled or deformed, then it cannot close completely.
You can clean the damper with a special tool, which can be purchased at an automotive supply store. Deformation may require replacement of the carburetor completely. The damper may not close tightly if the drive cable is worn out. Replacing it may improve the situation.
Another common reason why the engine speed does not drop at idle is a gasket between the carburetor and the cylinder head that has become unusable, or a damaged intake manifold.
After replacing the carburetor or cleaning the power system, you can often notice that the engine speed drops slowly. This is due to improper adjustment of the idle system, often a re-enriched air-fuel mixture is supplied. To fix the problem, it is necessary to adjust the ratio of the fuel and air supply to the system.
Also, a high level of fuel in the carburetor float chamber can provoke a defect in operation. The needle valve is responsible for it. Checking this detail may correct the situation.
Injector system
If an injection system is installed on the car, then there can be much more reasons for high idle speeds. Here, both mechanical elements and electronic devices responsible for adjusting the twentieth can fail.
The main malfunctions of the injector include:
- Incorrect operation of the temperature sensor installed in the cooling system. Incorrectly received data from this device causes the electronics to recognize the engine as cold and work to warm up, thereby maintaining the high speed required to reach operating temperature. Overheating can often occur, which leads to more serious breakdowns, up to a major overhaul of the engine. The same effect is possible if the idle speed regulator does not work properly.
- The throttle control cable may be stuck. The higher the mileage of the car, the higher the risk of encountering a similar problem.
- The XX electronic work sensor often malfunctions, then the revolutions will either increase or disappear altogether.
- The spring that brings the throttle valve to its original closed position is not functioning properly, jumping off or stretching too much.
- Too much air enters the combustion chamber due to poor quality or leaky gaskets. It is necessary to carefully check the seals of the manifold and injectors.
- And the simplest reason is usually the wrong location of the mat after a visit to a car wash or dry cleaning of the interior. It is often inaccurately placed under the accelerator pedal, resulting in the appearance of improper engine operation.
If the car is oversaturated with a variety of electronics and all work is based on the correct functioning of the sensors, one of them may well become a problem. It will send incorrect data to the computer, as a result, the speed will not fall. Most likely, it will not be possible to detect the problem on your own.
It is necessary to contact a car service for computer diagnostics. Best of all, the task will be handled by specialists working at a service that specializes in repairing a particular brand of car. If the diagnosis is carried out on time, then it is quite possible to get off with a simple replacement of the sensor.
It is not worth delaying the repair, because a supersaturated mixture has a bad effect on the operation of the engine and significantly reduces its service life.
floating speed
In addition to slowly falling revs, motorists may encounter the phenomenon of floating revs, where they fall and then rise sharply. The reason is the excessive air supply to the system, which causes the engine to spin up to 2 thousand revolutions at idle.
This often happens in vehicles that have a fuel injection sensor. It calculates how much air the mixture needs. When its work is disrupted, a different amount of oxygen is supplied at different times, as a result, speed jumps are observed approximately every 3 seconds.
Faced with a similar phenomenon, the same computer diagnostics will be a prerequisite. It is very important that it and all subsequent work is carried out by experienced, qualified specialists. By contacting a service that does not specialize in breakdowns of this kind, you may be faced with the need to carry out an expensive overhaul of the engine ahead of time.
Hello dear friends! While operating your car, almost every driver faces certain difficulties and problems. Someone , for others, antifreeze boils, and for others, the engine speed at idle does not drop at all. It is about the latter situation that we will talk with you today.
This is a widespread malfunction in which the engine constantly keeps revs. Leaving the engine at idle (XX), all the same, the tachometer needle does not want to go down.
Similar situations are found in almost everyone who has an injector and carburetor, diesel and gasoline internal combustion engines under the hood. At the same time, the reasons for injectors and carburetors are different. Let's take a closer look at them.
How to determine if there is a problem
First you need to understand how you can independently determine increased or simply abnormally high revs on your own car. After all, even at idle, there is a certain level of revolutions and it must be stably maintained.
In practice, identifying a problem that has suddenly appeared is quite simple. Even in those situations when a novice is driving, and he does not have much experience in such matters. First of all, you can just listen to the work of the internal combustion engine. The lower the speed of the motor, the quieter it will eventually run. But it's even easier to diagnose the problem with , which is installed on the vast majority of cars and trucks. Look at the position of the arrow and record exactly what speed you see when driving at a measured, calm pace, and what the device shows after warming up or when you release the gas.
Depending on the engine, each power unit has its own idle speed standards. Usually it is from 650 to 950 rotations within a minute.
Now take a look at the instruction manual. There, the parameters of the norm for XX are necessarily indicated. If the current values differ from the indicators from the manual, this can be considered a deviation. That is, you need to start looking for a provoking factor.
Owners of injection engines are greatly helped by on-board electronics. If the RPMs at XX are higher than the norm laid down by the manufacturer, the check engine light will probably light up on the dashboard. Here I advise you to look into our material, where we talked about and their meaning.
Possible consequences
Similar phenomena occur on a large number of machines. Almost any modern and fairly old motor is able to present such a surprise to its owner. It could be:
- VAZ 2109;
- Renault Logan 1.4;
- VAZ 2107;
- VAZ 2110;
- Chevrolet Sense;
- Mitsubishi Lancer 9;
- Niva Chevrolet;
- VAZ 2114;
- Kia Cerato;
- Chevrolet Lacetti;
- Chevrolet Lanos;
- Toyota Corolla etc.
It would seem that, well, the speed has increased, but nothing terrible is happening.
In fact, processes can occur in the engine that are initially invisible to the driver. But gradually the consequences will become obvious and often frightening in their cost of restoration.
In no case should you leave an increase in speed at idle.
This can be explained by several main possible consequences.
Here are the potential problems:
- Fuel consumption will constantly increase, which will negatively affect your budget;
- A hot engine leads to problems with the cooling system and a general decrease in resource;
- Often the fuel will corny fly into the pipe, which also threatens to detonate it in the exhaust system;
- The total resource of the power unit will begin to decrease;
- The node with which the increase in speed is associated will suffer.
There are enough reasons to quickly take action and eliminate the provoking factor.
RPM drop on carbureted internal combustion engines
Despite the new environmental standards, in our country the number of cars with carburetor engines is quite impressive.
If you notice that on such an engine, the revolutions are kept at a fairly high level at idle, the reasons may lie in the following:
- Idling system incorrectly adjusted. If it has been interfered with recently, be sure to check the current setting;
- Problems with . An increase in idle speed may be due to its improper closing. Check the damper for soot. There may also be a chip or crack. There is only a replacement;
- Needle valve. The reason is its location. Perhaps when an incorrect dosage of fuel enters the chamber;
- Block head gasket. She just burned out. Will have to change;
- The suction is open. To check, you need to evaluate the operation of the damper in the primary chamber. If there is a problem, check the performance of the suction. Usually the problem is solved by lubricating the drive and cable.
It is these causes that most often appear on cars with carburetor engines, when the idle speed remains at an abnormally high level. They are potentially considered in situations where the engine almost immediately.
There is another option that is relevant for carburetor and injection ICEs. Here we are talking about sticking the gas pedal.
Problems on the injector
Separately, it is necessary to consider situations due to which at the twentieth revolutions can increase precisely on injection types of engines.
Unlike carburetor internal combustion engines, where all the problems lie in the mechanical part, the injector has a high probability of electronic malfunctions.
- Malfunction or failure of the sensor that controls the temperature of the coolant. This is a drive to constant operation in the engine warm-up mode. You need a diagnostic scanner and probably a replacement controller;
- Malfunction or breakdown of the XX sensor. It's a mass air flow sensor. Diagnostics with special equipment will help. Eliminate open wiring with a multimeter, replace the assembly as necessary;
- The same problems, but with the throttle position sensor. That is throttle. The controller either jammed or broke;
- Throttle return spring. It can stretch or come off, causing the corresponding behavior of the motor at idle. The node is returned to its place or changed to a new one;
- Hall throttle cable. Relevant for older cars. Replacing or lubricating will help solve the problem;
- Gaskets for injectors. They don't get damaged that often. Diagnosing the problem is difficult. They are usually checked last.
Be careful when running and observing the behavior of the tachometer in your car. If you see RPMs fluctuating, rising to abnormal levels, and behaving uncharacteristically, don't ignore these symptoms.
Almost every owner of domestic vases faced the problem of high idle speeds. That is, when the engine is started, the revolutions, as expected, are increased, but when the engine warms up, they do not fall below 1500 or 1000 revolutions, which is not normal. There may be several reasons for this - and a malfunctioning TPS and idle speed controller.
To fix the problem, you should diagnose the main components and components that affect the increase in speed.
Why can there be high idle
One of the main reasons may be the failure of the IAC - the idle speed controller, it is he who is responsible for adjusting the engine speed at idle. At , the revolutions can “float”, increase and decrease spontaneously. With a complete failure of the sensor, at idle, the car may simply stall.
Also, increased speeds can be caused by a malfunction of the throttle position sensor (TPPS). Over time, moisture gets under the sensor, which leads to the formation of oxide and rust on the regulator stem. To check this, you need to unscrew the sensor and carefully inspect it and the stem. If rust is found on them, they should be treated with a penetrating lubricant or WD 40.
As a rule, the problem of increased speed on the VAZ 2110-12 lies precisely in these two sensors. Therefore, first of all, you need to pay attention to them.
Where are the IAC and TPS sensors located
So, for starters, let's check the IAC sensor. It is located on the throttle assembly below the TPS sensor. Dismantling it is very simple - remove the block from the sensor and use a Phillips screwdriver to unscrew the two bolts of its fastening. Then we pull out the sensor or make its diagnostics, read about it below.
The throttle position sensor is located above the IAC and is also fixed with two bolts. It unscrews quite easily, there is no need to remove either the nozzle on the throttle or the throttle itself. Disconnect the block, unscrew the two bolts and pull out the sensor.
To make sure that the problem of high turnover is really in one of these sensors, and maybe in another right away, they should be diagnosed.
Diagnostics of the IAC 2110 sensor
It is possible in several ways. To check we need a multimeter. First, let's describe the simplest way:
IAC test method 1
- Disconnect the block from the sensor and unscrew the sensor
- Turn on the ignition
- We connect the block to the removed sensor, the needle in the sensor should extend, if not, then the sensor is faulty
IAC test method 2
- Disconnect the negative battery terminal
- Using a multimeter, we measure the resistance of the external and internal windings of the IAC, while the resistance parameters of contacts A and B, and C and D should have indicators of 40-80 Ohms.
- At zero values of the scale of the device, it is necessary to replace the IAC with a serviceable one, and if the required parameters are obtained, we check the resistance values in pairs B and C, A and D.
- The multimeter should detect an open circuit
- With such indicators, the IAC is serviceable, and in their absence, the regulator must be replaced.
IAC test method 3
- Disconnect the block from the sensor
- Using a voltmeter, we check the voltage - “minus” goes to the engine, and “plus” goes to the terminals of the same block of wires A and D.
- The ignition is turned on, and the data obtained is analyzed - the voltage should be within twelve volts, if less, then most likely there are problems with the battery charge, if there is no voltage, then you will have to check both the electronic control unit and the entire circuit completely.
- Then we continue the inspection with the ignition on, and alternately analyze the conclusions A: B, C: D - the optimal resistance will be about fifty-three ohms; during normal operation of the IAC, the resistance will be infinitely large.
Diagnostics TPS VAZ 2110
To diagnose the sensor, we need a voltmeter.
- It is necessary to turn on the ignition and check the voltage between the slider contact and the minus with a voltmeter. The voltmeter should show no more than 0.7 V.
- Now you need to turn the plastic sector, thereby completely opening the damper, then measure the voltage again. The device must show at least 4 V.
- Turn off the ignition and disconnect the connector from the sensor. We check the resistance between the contact of the slider and some output.
- Slowly, turning the sector, follow the readings of the voltmeter. Make sure that the arrow moves smoothly and slowly, if you notice jumps - the throttle position sensor is faulty and must be replaced.
Symptoms of malfunctioning DPS
- Deterioration of vehicle dynamics
- floating idle
- Jerks during acceleration
- Increased idle
- Engine may stall at idle
If one or more of the above symptoms are detected, the sensor should be checked and diagnosed in the manner described above.
Which TPS sensor to choose for replacement
- DPDZ / 2110 / GM 2112-1148200 price from 300 rubles
- DPDZ / 2110 / PECAR 2112-1148200 price from 200 rubles
- DPDZ / 2110 / StartVOLT VS-TP 0110 price from 200 rubles
- DPDZ / 2110 / HOFER HF 750260 price from 150 rubles
- DPDZ /2110/ CJSC Account Mash 2112-1148200-05 price from 400 rubles
- DPDZ /2110/ OJSC RIKOR ELECTRONICS 2112-1148200 price from 300 rubles
Replacing the Throttle Position Sensor VAZ 2110
Using a Phillips screwdriver, unscrew the two sensor mounting bolts, disconnect the block and remove the sensor.
If traces of rust or oxidation are found on the rod, which regulates the speed, it is necessary to clean it with a penetrating lubricant.
