According to statistics, every car owner with a long service of the car is experiencing problems with a burden, depending on the reasons, the car or poorly accelerated, or could not even touch the place. In a different way, the engine is simply not enough power to cope with all loads - dial speed and speed.
Dashboard
The most interesting thing is that the motor in such situations behaves like completely "healthy". Do not hear any noise, no knock or other evidence of work violations. I would like to note immediately that the list of possible causes of power loss is huge and to paint all the faults is very difficult. Let us give a list of only the most common, as well as detail their character and possible causes of appearance.
The main causes of power loss
If there are no other problems, as soon as the thrust loss is found, then first of all it is worth paying attention to quality. As practice says, in 51% of cases with power lies, poor-quality fuel is associated. The tank is reflected bad or non-corresponding for this model, fuel. It is not rare that modern cars, especially foreign production, do not tolerate 92 gasoline brand. Sometimes it can cope quite simply, it is enough to dilute with better fuel. Often, such manipulations help with the unstable operation of the engine, "" turns and the like. Then it is simply observed "" on the tidy.
Owners of gasoline engines without problems can check the quality, looking at the candles. If the reason lies in combustion disorders, as well as the presence of impurities - it will be displayed on the candlelight, the nagar will appear, and the color will change.
For example, when the fuel is oversaturated with third-party metal-containing components, the "skirt" and contacts will cover a reddish tint. The formation of black nagar indicates the defective combustion of the mixture. In any situation, with failures in combustion processes, the engine loses power.
Also do not forget that when checking the candles, you need to remember the service life. They are not durable, especially if it was originally not high-quality. Now an interesting fact, if after replacing the entire set of candles, "scale" is formed as quickly and the engine is experiencing the same problems, then the reason is to look for in filters or cylinders.
Problems with gas distribution phases occur due to not correctly installed "Label" belt, timing chains. Belts are stretched, chains are jumping, after which due to ignoring problems, the consequences may be much sad.
Engine banal wear. Do not forget that cars with mileage on average lose 10-15% of power. If the power loss in your opinion is much more, then it is reasonable to check the compression. Weak compression, and this is often less than 10 kg / m. He indicates the struggling walls of the cylinders, the wear of the rings, the valve fixes and the like. Compression data for each model will differ, but usually it is 12-14 kg / m. More about what you have, you can find out in the service book.
Causes in transmission. Worn clutch in the manual transmission or slip of the automatic transmission. The check is better to entrust the experienced masters, especially this concerns the automatic transmission.
Probably, any driver faced such a problem when the car lost the former dynamics: it accelerates for a long time, and when lifting and completely refuses to move on increased gears. In this article, we will tell you in detail what to do if the VAZ engine does not pull or pull badly, consider the main causes and troubleshooting methods.
Conditionally all types of gasoline engines can be divided into gasoline and injection. In general, their principle of action is absolutely the same, but the factors that affect engine power become different. Consider the problem of the carburetor and injection engine separately.
Not pulling carburetor engine VAZ
The carburetor is a mechanical device intended for a mixture of air and gasoline, with a further supply of this mixture into the engine combustion chamber. Problems with the lack of engine power on the carburetor are quite common and the reasons for their large set. We will try to deal with each.
- Engine power system
First of all, the loss of engine power can be hidden behind the power system. As a rule, the engine does not pull due to a lack or oversupply of fuel. The fact is that gasoline and air are mixed in a certain ratio. And if one or another element is missing - then the motor will start working unstable and stop developing the required power.
The ratio of air to the fuel should be within 15 to 1. If the amount of gasoline becomes exceeding the permissible parameters, then it will not be completely burned, and therefore reduce the engine pickup. In addition, such a change of ratios will seriously increase fuel consumption and will later lead to other engine faults.
Insufficient fuel and at all leads to "starvation". The ignition of the fuel mixture will be insufficient, and the piston will move slowly. All this is achieved properly adjusting the carburetor, the exact selection of jecles and many other factors.
It begins with the very selection of jecles. An important condition is the presence of a larger size of the gibler on the air than the gibber on gasoline. Then the setting is the float chamber of the carburetor, which should only be filled with gasoline. After that, the engine engine starts and adjusts the amount and quality of fuel in accordance with the technical literature on this model of the carburetor. If, it has reached a stable number of revolutions within 800-900 rpm, then the carburetor setting was successful.
Another power in the system is the presence of clean air and fuel filters. If the filter is too polluted, the fuel or air will pass with great difficulty, which also disrupts the composition of the mixture. Thus, filters must always be maintained in a purest state.
Check also. It is possible that it opens not completely. In this case, stop the motor and adjust the position of the throttle.
It is also possible that the gas station stopped creating the required pressure. To do this, you need to remove it and check. It is possible that it will have to change the drive and its diaphragm. There is another very common malfunction - elevated stock wear of the fuel pump. This means that in the manual it shakes well, and when the engine is started, there is a short time, then it loses the power and the motor stalls.
- Valve knot
The gas distribution mechanism also plays the last role in maintaining the motor power. If the valve, in the process of wear, lost its tightness, the gases directly into the valve mechanism will be broken from the combustion chamber. All this reduces the pressure generated in the engine cylinders, so the pistons move noticeably slower.
To restore the tightness of the valves, it is necessary to last and correct their adjustment. The essence of adjustment is to exhibit thermal gaps in their shock mechanism. The magnitude of the gaps is indicated in the reference book for the engine of the car.
In addition, the valve mechanism should work in synchronization with the crankshaft of the engine. If the opening and closing of the valves will not correspond to the position of the piston, the engine will not only pull badly, but may not start at all.
- Ignition system
Perhaps a decisive factor. Sparking should only take place in strictly specified tacks, otherwise the motor will not only pull badly, but it can overheat and work is very and not stable. If the Uzen adjustment was successful, and the motor still does not pull, and at idle does not work at all, then it makes sense to check the ignition system as a whole.
On the contactless ignition system, you must make sure that the switch is good. To do this, turn on the ignition and follow the position of the voltmeter arrow: first it must deviate to 12 volts, and after a second climb even higher. If the voltmeter is not provided for by the design of your car, then replace the switch on knowingly well and check the ignition operation again.
First of all, pay attention to the purity and density of adjacent contacts in the rubble. If everything is in order, you can go on. Run the motor and alternately pull the high-voltage wires. After each wire, listen to how the motor works. If he begins to work even worse, then there is a spark in this cylinder. If the engine work did not change, it means that you found a faulty spark plug or high-voltage cable. Checking this assumption can be performed by replacing the item on knowingly serviceable.
Improper use of spark plugs also affects the operation of the engine. Most often, the difference in candles is the gaps between the electrodes. The magnitude of the gap must match the engine, the season of operation of the car and the candle model.
Check the ignition distributor. It is possible that the resistor located in the rotor circuit burned in it. Another problem is a loose fit of the contact carbon. Try replacing it or spring.
The last problem of ignition is fuzzy operation of the Octane-corrector. In the absence of the desired discharge, the special plate is not returned to its original position. In addition, an increased backlash is observed in the system. Eliminate it and replace all faulty details. Check the tightness of the hose.
The last and most terrible malfunction is. These items are designed to reduce the friction of the piston on the wall of the engine cylinder and removing oil residues so that it does not fall into the engine combustion chamber.
The rings malfunction entails a violation of the tightness of the combustion chamber, in connection with which the compression of the cylinder is seriously reduced. It is possible to determine this at elevated oil consumption and the corresponding color of exhaust gases. In this case, only serious engine repair will help.
- Faulty exhaust system
The outlet part of the car also plays an important role in creating the desired pressure in the engine cylinders. If this pressure difference on the inlet and the release is impaired, the engine thrust may noticeably decrease. In this case, check the contamination of the exhaust system: pipes must be removed and inspect. Special attention is paid to the receiving pipe. If there are any holes in it, it will lose its tightness and becomes unsuitable for use.
If there are any extra holes or damage in the resonator, pipes or silencer, then they must be replaced by mandatory.
Badly pulls the injection engine
Part of the faults of the carburetor motor can be safely attributed to the malfunctions of the injection. This applies to the GRM mechanism, filters, ignition systems, exhaust and piston engine group.
- Fault of a gasoline pump
The main feature of the injection engine is the presence of an electric gasoline pump. It is an electric motor that creates a discharge and pumped the fuel system with a necessary amount of fuel.
Affects the stability of engine speed. After all, if it works with interruptions, then gasoline will be supplied in the appropriate amount. Most often, electrical wiring, a fuel pump relay or a contact group of an electrical circuit is to blame. In this case, it is necessary to diagnose and repair the faulty fuel pump.
Another problem of gas station is increased pollution of its filter. Check out the output pressure and compare it with normalized values. If the measurement result does not match the reference values, the fuel pump filter must be cleaned.
- Injectors (injectors)
The nozzle is called a small electromagnetic valve, which at certain times of time sprayed the fuel-air mixture into the engine combustion chamber. Engine power also depends on the correct operation of the injectors.
The diagnostics of their serviceability is performed using a multimeter. To do this, you need to check the resistance of the windings for the presence of cliff and short circuit. If their malfunction is detected, the nozzles are subject to replacement.
- Faulty sensors
Sensors are the main information collector for the operation of the electronic control unit. In the event of a malfunction of one of the sensors, the controller, without receiving the necessary information, instantly transfers the motor to the emergency mode with the inclusion of the corresponding lamp on the engine dashboard.
A faulty sensor can be calculated by electronic diagnostics at maintenance stations and replace.
- Malfunction of the ECU itself
The electronic control unit can also give malfunctions. To check its performance, it is necessary to replace it with knowingly well and test the operation of the engine. The voltage supplied to the block must be 12 volt.
Video - the engine does not pull on low revs, the car does not go in
If the machine does not show the former power and craving, you will not receive any pleasure from traveling driving. Yes, even often the consumption of gasoline or diesel fuel is growing, the risk of failure of any aggregates is increasing. The owner of the car intuitively understands that something happens in the design of the vehicle. Therefore, the desire to check the car appears, find the cause of flaw and get specific solutions to the problem. Today we will talk about why the car does not pull, and also what you need to do in such situations where it is first worth watching. If you encountered such a problem suddenly, you should quickly diagnose the main nodes of the machine, determine the problem and eliminate the cause of power loss. If the problem is present for a long time, it's time to call for a hundred and solve this question.
If you ride a long time with most problems that cause thrust loss, you can fully soak the power unit and get the need for expensive repairs. So we strongly recommend immediately to pay attention to the tangible loss of engine power or the real feeling that someone keeps you for the exhaust pipe and does not allow to accelerate. The longer you will think that it will pass with time, the more harm you can drive. This will be the cause of excessively expensive repair ultimately. Consider the main reasons for such a phenomenon.
Stop ride on the handbrake, and the thrust will appear by itself
If you always put the car on the handbrake, but you forget to clean it while driving, get ready for impaired traction. When driving on the handbrake, the feeling is created that the car is very tightly accelerated, too difficult is gaining momentum. The driver immediately sin on the engine, steps on the suspension or gearbox. But he even can't even think that it is enough to lower the manual brake lever so that the problem is solved by itself. Moreover, riding on the handbrake will be enough for a long time to be the following troubles with the machine:
- the rear brake discs (or drums, depending on the design of the car) are too heated;
- heating causes the deformation or excessive wear of these parts with different consequences;
- wear in any case will be very high and the reason for the mandatory replacement of the pads and disk after 100 kilometers of such a trip;
- the drum brake can be opened at all during the movement, reducing the safety of the trip;
- heating and excessive friction can cause the failure of some details of the chassis;
- the brake system can also get other problems that require an instant solution.
These troubles are waiting for you if you just forget to remove the hand brake lever at its original position before moving from the place. If you have a manual gearbox, follow the handle becomes even more difficult. On the machine, it is not enough not to gas from the first second, but to give a car to show readiness for the trip, allow him to touch him at idle. In the event that you regularly leave the hand brake regularly, just stop putting the car well, the handbrake. Leave it on the transfer, choose more or less smooth parking spaces.
Check the most common reasons for reducing traction
Reduced engine power can also be caused by other problems. For example, if you conducted an independent re-equipment of the main nodes and parts of the machine, you can be sure that the thrust will decrease. It is also worth paying attention to the frequency of the service and the quality of the busty busty. If you did not change the oil in the car for several years or several tens of thousands of kilometers, the wear of the engine parts will be simply incredible. You will have to restore the unit, and the loss of thrust means that you have little time for repair and preventive work. The main causes of losses are the following:
- poor fuel - if the gasoline is terrible, it simply does not fade completely and does not give the necessary power;
- low quality and poor engine maintenance frequency, which caused the depreciation of the main parts;
- increased wear of the piston group, poor engine performance and power loss due to natural processes;
- depressurization of one of the cylinders, low compression due to large gaps between the details;
- failure of the electrical system, candles, wires and sensors, refusal to work one or two cylinders;
- the transition to alternative fuels, including gas, which naturally reduces the efficiency of the aggregate;
- setting the wheels of significantly larger diameter than they were installed at the factory and replacing other important parts of the machine;
- perform the overhaul of the engine using analog spare parts.
All this processes cause a reduction in thrust, which is the main indicator that you need something to quickly do. Otherwise you have to search how to sell not a completely working car and how to buy more or less normal money. It is better not to bring before and upon the first appearance of problems with the right to bring the life to your iron horse. Loss of engine power should serve as an indicator that you need to take some action.
Why is it better to solve the problem with a load on a hundred?
Of course, if the bad thrust is connected with a forgotten handbrake or bad fuel, no service will help you. Unless, you need to eliminate the problems of increased wear of brake discs. In other cases, it is better to immediately contact a hundred and not experiment with independent possibilities of repairing repair. So you can restore your car in a short time, you do not have to check the possible theories of breakage. The main benefits of maintenance in this case, professionals will be as follows:
- specialists will find the cause of the problem and will be able to fully restore the normal mode of operation;
- on the service you will recommend changing the habits of driving, so that you will not fall into such a situation;
- all parts of the company will purchase independently, which reduces the risk of acquiring poor-quality details;
- diagnostics will show an accurate node that it is worth recovering that it can often save your money;
- performance will be professional, you will be guaranteed to manage the renovated node.
These are important advantages of car service from specialists, therefore it is better not to neglect them and get the maximum comfort in the operation of your car. Often you will have to overpay for the notable services of professionals, but this overpayment will benefit yourself. After repairing the repair at a good station, you will not have to worry about possible repeated problems with the burden. Nevertheless, the health of the car in most cases depends on the behavior of the driver, from the habits on the road. Because if you constantly have a certain problem in your car, just change the driving style. If you have a domestic car, you can see the following video with a description of possible problems with the loss of car thrust:
Let's sum up
Given the sufficiently complex system of the design of a modern car, the loss of thrust may not be so felt or even not felt at all in daily operation. But this is a serious indicator that it is time to fulfill a certain set of repair work. Therefore, it is better to listen to the car and try to determine its real problems. If the power loss was seen, it is best to immediately go to a hundred and eliminate the problem. Only so you can avoid serious destruction with fairly expensive consequences.
If your car has long been hidden the power, do not think that this is a natural car aging process. It is better to go to the goal and eliminate all possible reasons for this problem. However, loss power can indeed be a natural process. Capital repairs, replacing original parts on analog and other familiar processes for the owner of the car are a real problem for the work of the unit. Tell me, have you come across a sharp loss of power in your car, and how was it decided to deal with this problem?
In the life of motorists, such a situation often arises when when leaving the road and try to accelerate, it is noted that the engine does not pull.
That is, the dynamics of acceleration is very "sluggish", the car is reluctant to gain speed, and the feeling that she keeps it.
This problem may occur almost with any car - domestic or foreign car, gasoline and diesel, with a carburetor nutrition system and an injector.
Often, the drop of thrust is accompanied by additional symptoms - third-party sounds appear during the operation of the motor, the engine can be sick on some of the modes (usually at idle), the crankshaft turnover is not stable and "float".
But this is not always the case, it happens that the unit on all indicators behaves perfectly, but the power does not develop.
Main reasons
The reasons for this phenomenon are very much and in most cases they are associated with a violation of the operation of systems and mechanisms of the power plant.
Some of them are trifling and eliminate very simple, others require a fairly serious repair.
The main problem with the fact that the engine does not pull, is not connected with the elimination of a malfunction, but its search.
In some cases, it is very difficult to identify that it has served as a decrease in trafficking efforts, it is very difficult and you have to sort out almost the entire motor.
Therefore, we will try to indicate the main reasons why the car is very "sluggish" accelerates.
Since engines on different cars have their own constructive features, we will consider on specific models.
Falling power on carburetor motor VAZ
To begin with, take cars VAZ with a carburetor nutrition system and 8-valve timing - VAZ-2109, VAZ-2110, VAZ-2114, VAZ-2115.
This car establishes the same power plant, so the reasons are identical.
Let's go through that components, due to the violation of which the dynamics drop may occur.
In general, the main reason that the engine does not pull, is the change in the processes in combustion chambers - the inconsistency of the proportions of the fuel-air mixture, is disturbed by the combustion process, the filling of cylinders and the exhaust gases is not as required.
Supply system
Very often the drop of thrust is due to the power supply system. A constructive carburetor fuel system used on a car from VAZ-2109 to the VAZ-2115 is very simple and is almost completely mechanical, so it is not particularly difficult to identify the cause.
Reduced power can occur due to:
In addition to the elements responsible for the supply of fuel, the power drop occurs and due to the severe contamination of the air filtering element.
Ignition system
This system also takes part in the combustion of the mixture, which means a failure in its work may affect the capacity.
In the carburetor engines of VAZ-2110 and others, the reduction of thrust may occur due to:
- Faults of spark plugs or changes in their thermal gap;
- Excessive wear of contacts and the central electrode of the distributor;
- Loss of voltage in high-voltage wires;
- Ignition ahead of the ignition angle.
Violations in nutrition and ignition systems most often become causes of power drop, so the test to identify the cause should be started with them.
If the operation of these systems does not cause suspicion, other components of the motor should be diagnosed.
Exhaust system, timing and CSM
Loss of thrust can occur and because of the exhaust gas removal system, although there are infrequently on carburetor motors.
The main reason here is to reduce bandwidth due to a large nagar in the silencer. Because of this, exhaust gases, not the time to take away from the cylinders, "stalk" the engine.
The causes of the drop in thrust are also often the gas distribution mechanism and a cylindropional group.
Here, the reduction in power is due to:
- Violations of the thermal clearance of valve;
- Strong nagar on the plates of the valves of the saddle, or their burning;
- Rings;
- Limit wear of the CPG;
- Trucking gasket GBC.
In general, problems with the GDM and CPG cause the power drop in any engines - carburetor, injection, diesel engines. Therefore, in the future these mechanisms will not mention.
Injector engines VAZ
In the injection engines VAZ-2110, 2112, 2114, 2115, both 8-valve and the timing of 16 valves, reveal the reason for the reduction of power is harder due to the more complex design of the main systems.
Supply system
Any injector consists of a mechanical executive and electronic controller and both problems may arise, which will result in power drop.
First consider the mechanical part. Here, influence on the craving can be provided:
- Strong clogging of the mesh filter on the fuel pump;
- Falling the performance of the fuel pump due to wear;
- Pollution of a fine cleaning filter;
- Malfunction of the pressure regulator of the fuel ramp;
- Burning nozzles;
- Fuel filter pollution;
- Air seats in the collector.
In general, the practical element of the injector's executive part can be the culprit of the dynamics.
Approximately the same situation is the electronic component.
Managing the engine with an injector is carried out by an electronic unit that constantly controls the parameters by means of sensors installed on different systems.
The number of these tracking elements is considerable and breakdown of any of them leads to the fact that the ECU is incorrectly assessed by the indicators on the basis of which it controls the executive part.
Because of this, the testimony of DPKV is violated, as a result, the operation of the ignition system is violated, which leads to a drop of thrust.
In injection engines, the exhaust gas removal system creates a specified problem than on a carburetor car, and everything is due to use.
The cells of the element have a small cross section, so they are quickly cleaned, which leads to the fact that the exhaust gases are "crushing" the motor.
Major reasons with engines of other cars
So, on the car Mitsubishi Lancer 9 most often the problem arises with the exhaust gas removal system. On this car, a double catalyst is used, which is relatively quickly clogged with nagar.
Therefore, many owners of this car in the fall of power recommend primarily to pay attention to this system.
But in the ZMZ-406 and 405 engines, which are equipped with Gazelle, Volga cars, the drop in power often occurs due to:
- Faults of ignition coils;
- Losses in high-voltage wires;
- Non-working candles;
- Sensor breakdowns (first of all - DPKV).
But do not forget about other elements of the supply systems, ignition, as well as timing and CPGs.
In the Ford Car Focus in general, problems with loss of thrust occur due to sensor malfunctions, as well as the elements of the power system - especially a fuel module, which includes both a fuel pump and a filter combined into a single design.
Approximately the same as the car as Renault Megane. In this machine, the drop in power can occur due to:
- Wear of the cover of the traver;
- Faulty candles and high voltage wiring;
- Weak bandwidth of the exhaust system;
- Worn fuel pump and contaminated filter elements;
- Damaged injector sensors.
In general, first of all, you should look for the cause in nutrition and ignition systems, and only then proceed to the timing and CPG.
If not pulling diesel
Reduced thrust may occur in diesel engines. If we consider old cars, whose power systems are fully mechanical, then the most common cause is the depressurization of the system.
As a rule, in the process of long-term operation of the vehicle, almost every driver sooner or later notices that the engine is badly pulling. In other words, the power unit with difficulty copes with the loads, the loss is noted, the unit must be unwound to high revolutions to maintain the usual pace, the car is worse accepted from the place, slowly gains speed, etc.
In this case, the motor in many cases works smoothly, not troit, no, knock or noise during operation. Immediately note, there is a fairly wide list of possible reasons why the heated engine does not pull, the loss of the motor's power is noted on cold and / or hot.
In this article we will talk about why the engine does not pull, as well as consider the most common malfunctions that manifest themselves in the form of losses of the power unit.
Read in this article
Motor does not pull: the main reasons for reducing engine power
So, if no other symptoms, in addition to losing thrust, is not detected, then immediately need to pay attention to the quality of fuel, serviceability of the system and.
- As practice shows, more than half of the cases of reducing returns from the DVS are associated with combustible. The engine does not pull due to the fact that the tank can be flooded with poor or unsuitable for this type of motor fuel (for example, 92th gasoline instead of the 95th).
In some cases, after refueling, problems may also arise with the start of the motor, the engine appears. To solve the specified problem, it is enough to dilute the existing fuel higher-quality. Less often there is a need to completely drain fuel from the tank, after which an additional washing of the power system is performed.
Typically, such manipulations are needed when parallel to the loss of thrust is noted unstable operation of the engine, and under load, the engine is badly started, on the panel, etc.
Also, the owners of gasoline engines can independently determine the quality of gasoline. To check the candle, you need to unscrew from the engine. The violation of the combustion process of the fuel and air mixture in the cylinders, as well as the presence of impurities in the combustion, can be revealed to ingun on the ignition candlelight and its color.
For example, if in the fuel there are many third-party metal-containing additives and additives, then the skirt and electrodes can be covered with a reddish in a brick color. Black Nagar will indicate that fuel burns defective, etc. In any case, failures in the process of combustion of the working mixture lead to the fact that the engine ceases to pull.
- The next step in diagnosis becomes. Reducing the efficiency of these elements is also accompanied by a drop in power of the power unit.
This is especially noticeable with sharp accelerations, and when the car is already moving at high speed. In other words, the engine does not have a "stock" for further acceleration.
Candles may be dirty, one should not exclude that their resource came to an end. To eliminate this problem, you can produce or immediately replace the entire kit to a new one.
It is important to take into account that if new candles are correctly selected for a particular engine in a calic part and other parameters, but still rapidly contaminated, then the reason for the loss of thrust is not in them. In this case, the formation of Nagara indicates problems with the mixing formation or combustion of the fuel charge in the cylinders.
- If everything is in order with candles, then it is necessary to check the condition of the fuel and air filter. In the first case, insufficient bandwidth can lead to the fact that the desired amount of fuel is not supplied to the cylinders to prepare the so-called "power" mixture.
As a result, the engine loses power, that is, does not pull under loads. In such a situation, it is enough to replace the specified filter element. As for the air filter, the problem is similar to the fuel filter, however, in this case, a lack of air is marked as part of the fuel-air mixture.
This leads to the fact that the fuel without a sufficient amount of oxygen burns defective. The power of the motor in such conditions is naturally falling, a tag is formed in the combustion chamber, candles, etc. are stiffed. To solve the problem, it is also necessary to replace.
Faulting system, ignition and impaired mixing
If Ignition Candle Problems and Filters can be defined directly on the road, then more serious problems associated with the system and ignition system are diagnosed and fixed on site is much more complicated. In cases where the engine is not gaining momentum, and jerks and failures are noted when the gas pedal is pressed, and or the injector is required.
Let's sharpen attention on a more common electronic injection. The list of major faults of modern injectionboxes are distinguished:
- malfunction, performance reduction or pollution of fuel pump filter mesh;
- malfunctions of injection injectors;
- problems with sensors or computer;
- malfunctions of the ignition system;
- air supply and leakage of fuel highways;
If we talk about the ignition system, except for candles should also be checked, ignition coils, etc. As for the fuel supplies, at the initial stage, the pressure in the fuel ramp (rail) should be measured. In parallel, the pressure regulator in the fuel ramp is also checked.
Often, many auto problems are associated with the fuel pump, which is located in the gas tank, as well as with the specified regulator. To measure fuel pressure to the rail, a pressure gauge is connected, the obtained values \u200b\u200bare compared with the recommended engine. If the pressure is below the norm, then the culprit can be both a gas station and pressure regulator.
The task of the regulator is to reset the excess fuel into the return at the moment when the pressure is above the norm. If the settings have come down or the regulator itself flows or faulty, then the fuel will be reset in the return time. To check this, the compressor or pump is pumped up air, the pressure in the rail grows. If the regulator has worked before the pressure indicator, which is recommended, the item must be adjusted or replaced.
Other reasons for reduced returns from the engine
The state of the motor also has a great influence. The fact is that to protect the environment from harmful emissions during the operation of the OI, catalytic neutralizers are installed in the release.
During operation, the filter catalyst can collapse, the bandwidth of the release system is reduced. As a result, the engine "strangled". The check is performed by pressure measurements before and after the catalyst. You can also remove the item and inspect its condition visually.
As a rule, in official services offered to replace the worn item, however, the price of spare parts is very high. For this reason, on many cars in the CIS, the catalyst is simply knocked out, and the control unit is "cheating" programmatically or other available ways.
Also, when reducing the power of the engine, it is necessary to separate separately to eliminate the likelihood of the phase failure of gas distribution. Sometimes there are situations where the belt can jump on one tooth, the chain is stretched, etc.
In this case, the synchronous operation of the valve mechanism in relation to the work of the engine's work can be broken. This leads to various failures, unstable operation of the aggregate and reduction in power.
We also add that engine wear and certain malfunctions also affect the power of the motor. As a rule, worn-out DVS with mileage usually lose about 10% of the stated power.
If the driver feels that the loss is more, then in the engine you need. Low cylinder compression may occur as a result of wear of cylinder walls, piston rings, or incomplete closure, etc.
Anyway, any looseness in the combustion chamber will lead to the fact that the expanding gases during the combustion of fuel will break from the cylinder. This means that the pressure of these gases to the piston will decrease, and the OI itself will be bad and unstable to work.
Finally, we note that the reason that the car lost in the dynamics may not be the engine, but a transmission. In other words, the power unit develops enough power, but it is not fully transmitted to the wheels.
Usually it is manifested that the engine roars, the turnover is high, but the car does not go or overclocking is very slow on reduced transmissions. Often, such problems are associated with the adhesion or voltage of automatic transmission, as well as with the twinkling of the brake system. To check the brakes, it is enough to disperse a car on a flat road, then turn on the neutral transmission.
If when moving rolled it is noticeable that the car immediately began to slow down, then the problem is obvious, the wheels are slightly blocked. If there are no problems with brakes, then the diagnosis of automatic transmission is necessary. The specified procedure is better to entrust the experienced specialists by delivering a car to the service.
Read also
Purpose, design features, location of the injector fuel pressure regulator. Signs of malfunctions of the RTT, checking the device.
