Why there is no thrust in the car. Why does not pull a diesel engine or reasons why the engine does not develop full power. Automatic transmission

In order for the engine to develop full power, the following conditions must be performed:

1 - good engine compression;

2 - stable and abundant fuel supply;

3 - a large amount of air.

If one of the listed conditions is not performed, the efficiency of the engine will be low.

When the load disappears during the load, this means that the engine control unit has switched to the emergency mode. Emergency engine operation is provided on all modern machines. This mode is required to ensure that the car does not quickly, but safely reached the destination.

To find it right it is necessary to produce computer diagnostics of the engine.

According to the results of computer diagnostics, we will understand which way to move and where to dig to find out the true cause of the malfunction.

If Dieselo engine lack fuel, Check the fuel equipment :.

If the diagnosis shows that diesel fuel is enough, and the turbine undersons and there are no errors over the rest of the systems, it is desirable to measure the engine compression.

The absence of the necessary engine compression will result in the engine will not pull and develop full power. If there is no piston compression, but there are in sufficient air and fuel, then the strong explosion will not happen, thereby not there will be a good exhaust, and as we know, the exhaust spins the turbine, so the turbine will not inflate the desired air volume. The lack of superior air will lead to the fact that the car will not pull.

The most common the cause of lack of superior air - Problems in the work of the turbine and disconnect the turbine itself.

Consider the engine with a variable turbine geometry (most common).

Turning off the turbine, as a rule, arises one of two problems: one is connected with air, the other with a mechanical malfunction of the turbine itself (wear of the impeller, the play of the axis).

There are turbines with variable geometry, which are managed by vacuum, and there are those that are controlled by an electronic actuator.

The car has four sensors that are entirely affected by the turbine.

1 - Advance pressure sensor. It will measure air pressure in the intake manifold.

2 - Advance pressure regulator. This is the valve that controls the geometry, i.e. Includes and turns off the turbine.

3 - inlet air temperature sensor. Shows the temperature of the air entering the motor.

4 - atmospheric pressure sensor. The atmospheric pressure at the vehicle movement is measured (ordinary atmospheric pressure relative to the sea level).

Most often it happens that the tightness of the air intake system is broken in the car. Thus, the turbine drives all the air outward (spanging the nozzle, a bad connection at the joints of the joints, cracked the intercooler (air cooling radiator).

To identify such a problem, it is necessary to check the entire air intake system for tightness.

Next occurrence problem: Faulty geometry in the turbine.

To check the geometry by car, you need to remove the vacuum hose from the actuator on the turbine itself. Wear another hose on it and try your mouth or special device to draw air. After this procedure, the rod that controls the geometry should change its position. If he does not change his position, then there may be 2 reasons or a membrane broke into the actuator, or the geometry itself swam.

Failure of the supervision pressure regulator and supercharge pressure sensorit is detected by the presence of errors on them in the results of computer diagnostics.

Advance pressure regulator can also be checked by a vacuum.

You must not forget to check the vacuum pump and vacuum tubes in the entire car for tightness. This is done as follows, disconnect the nozzle in any place, apply the hand, the air drawing should be felt.

The turbine with an electronic actuator is checked only with the help of computer diagnostics!

Please note that the thrust loss can also influence the "vortex" dampers (not in all cars).

We hope that this information will help you to identify the reason why your car does not pull or does not gain complete power, as well as get enough knowledge to communicate with car service specialists.

Sometimes the owners of the product of the domestic auto industry are faced with the situation when the injection engine does not pull on the VAZ 2114. This problem is not rare, so we will try to carefully understand the reasons for the "weakness" of the engine and solve them yourself.

List of possible causes of power drop

Quickly answer the question: why the drift of the VAZ 2114 engine disappeared on 8 valves can be far from the first time, not everyone, even an experienced, driver.

To do this, you need to consider all possible sources of breakage:

• getting garbage in a gasoline cleaning filter;
• zoom of the fuel pump diaphragm;
• fault of the sensor controlling air flow;
• bad work of candles;
• problem in the work of the ECU (electronic engine control unit);
• dusting air filter;
• zado injectors;
• full wear of the clutch disk;
• insufficient compression in the cylinders.

Analysis of the reasons for bad engine thrust and possible repair

Fuel filter pollution

There may be noble gasoline to this (containing various small garbage) or rare cleaning of the fuel tank. In this case, you will have to completely replace the entire filtering system.

Baszonasosa diaphragm dilution

The cause of the blockage, as a rule, becomes low-quality gasoline. For cleanings, it is enough to get a diaphragm and rinse carefully or blow it with air.

Malfunction of the sensor controlling air flow

This is the most common reason why VAZ 2114 does not pull.

Signs of malfunction:

• too high or low engine speed at idle;
• intermittent engine work at idle;
• violated overclocking dynamics. The car becomes uncontrollable and often "freezes."

Periodically, it is worth checking the operating condition of the air flow meter to avoid spending time and money, conducting the engine diagnostics.

Air filter dusting

The greater the dust filter, the less air goes to the engine, therefore, the thrust decreases. What can be done in this case? Ideally, the filter must be changed to a new one, but if it is impossible, you should remove the filter, catch up and blow to remove large garbage (flies, dry leaves, bugs).

Zado injectors

When the injector slaves are clogged, you will have to go to a hundred for ultrasonic cleaning, or purchase a special cleaning fluid.

Auto mechanics advise to acquire only high-quality equipment for washing the nozzles, such as Wynn's (Vince), Liqui Moly, Carbon Clean.

The procedure itself is quite simple: the cleaning agent must be pouring into the benzobac. But this method can only help if the fuel system is not polluted. The engine with mileage for several hundred thousand kilometers is likely to need a complete replacement of nozzles.

Complete wear of the clutch disk

It is possible to determine the disk wear on the following features:

• the pedal is easily "interpreted", but does not return back;
• the clutch is sinking;
• when the clutch is turned on, tangible vibration arises;
• unable to turn off the clutch.

There is another way to wear wear: if on the fourth gear, try to move from the place and the engine will stall - it means there are no problems with the disk. If the engine continues to work, then probably the clutch disc will have to be changed.

Bad work candles

There are several signs for which the Ignition Candle faults can be determined:

• at idle the engine makes an unpleasant noise;
• a sharp pressure of gas causes failure in power;
• the engine works unevenly;
• increased fuel consumption with a reduction in power;
• candles are flooded with gasoline.

Visual inspection of candles can also help identify a malfunction. If the candle is covered with dark butter, it has a gloss or velvety nagar, then it unequivocally testifies to problems.

Faulty ignition candles must be replaced with new ones.

Insufficient compression in the cylinders

This defect appears due to the high wear of the entire cylinder-piston system. As a result, the car owner notes that oil consumption increases, the combustible mixture is not completely combustible, and the fuel falls into the crankcase. This problem is serious and resolved either by replacing the piston rings, or the maintenance of the engine at the maintenance station.

Failure in the electronic engine control unit (ECU)

Signs of malfunction of the ECU may be several:

• various mechanical damage on it;
• lack of indicators from various system control sensors;
• the lack of gas station control signals, a system of idling machine and other mechanisms under the control of the ECU.

Unfortunately, this device is not refundable in most cases. Even specialists of the service station will simply be replaced by the ECU to a new one, after diagnostics.

Finally

The article lists all possible reasons for which the VAZ 2114 does not pull. It is independently analyzing them and deal with the poor thrust of the engine for each motorist. This will save a significant amount of money compared to the cost of diagnosis in the service center.

On this topic you can write a passionate book. However, such a lot today is written: who is interested, it will definitely find and carefully read. We will try to identify the main reasons for such a disorder.

First, remember what the engine needs to work. It is necessary that the right bench-high mixture should be created on time. Therefore, if the short quality or does not come in proper quantity, then the good thrust from the motor does not have to wait. With a low octane number, the engine control system will translate the ignition advance angles to the latest (and still possible). With insufficient performance of the fuel pump or clogged fuel filter, it will be easy to miss. More on the mixing formation affects the quality of spraying fuel by nozzles. If they are clocked and do not form the correct fuel torch, then the proper composition of the mix is \u200b\u200balso not expected.

• For the proper formation of the mixture, another component is needed. And if the air filter is overly clogged, the engine control system will see the lack of air and limit the fuel supply than the power will certainly reduce the power. At the same time, the unaccounted air control system of the air control will also violate all calculations.

• Now about the initiators of burning - spark plugs and coils, providing them with high voltage pulses. If these components are at least in one of the cylinders are launch, then, unauthorized power.
• The optimal filling of the cylinders of the working mixture and timely removal of the exhaust gases depends on the correct phases of gas distribution. Therefore, the leakage of the belt or the timing chain even on one tooth will undoubtedly lead to a drop in power.

• To ensure the optimal combustion process, the mixture must be compressed. Therefore, the wear of cylinders, which reduces, the most negative impact affects the engines of the engine.
• The insufficiently warm engine produces less power not only because the viscous oil is stronger than the movement, but also because the injection system itself limits the parameters. And the motor can be underencing or temporarily, in a period of strong cold weather, or constantly - for example, with a faulty thermostat.
• The burnt mixture is necessary to delete in a timely manner, so the influence of the exhaust gas release system to the engine power is also significantly. If the resistance to the output of gases is large - no parameters from the engine do not expect. Improve resistance can either clogged or jammed pipes of the exhaust gas release system.

• What else? In addition to the engine, the car has other reasons to lose initial acne. For example, the buxing clutch is worn or incorrectly adjusted: you press the pedal, the motor responds, and the machine can crawl ... it can also joke: the most banal version is the captured parking brake.

If we missed some reasons, please add material with your considerations.

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.

During the operation of the car, many owners face a number of problems. One of them is to reduce engine power. It is not always clear what the cause of such a phenomenon to take action is to go to a hundred. Let's talk about the main reasons why the engine does not pull and how to troubleshoot the problem on your own.

The main reasons for reducing engine power

1. Crankshaft position sensor fault

There are situations where DCPV will defiantly sends the control command to supply the fuel-air mixture. As a result, the power of the power node falls in front of her eyes. The main cause of the failure is the shift of the gear star towards the pulley and the bundle of the damper. In such a situation, it is necessary to carefully examine the damper and replace it.

2. Increase (reduction) of the gap between the electrodes of candles

During operation due to the powerful temperature effect, the distance between the electrodes of the candle can decrease or increase. To exclude or confirm your suspicion, it is necessary to check the values \u200b\u200bof the gaps using a round probe. If the distance is less than or more permissible, you need to adjust the adjustment by selecting the side of the electrode or replace the candle. As for the optimal distance of the spark gap, it may be different (depending on the type of candle) - 0.7-1.0 mm.

3. Appearance of Nagar on Candlelight - another obvious sign of the problem

If the engine is bad, it is necessary to unscrew all the spark plugs alternately and to inspect them. When an explicit nagar appears on the electrodes, the device must be cleaned with a brush with a metal pile. It is important not to just clean the candles or replace them, but also to find out the cause of this phenomenon.

4. Frozening

Reducing the engine power may be caused by the failure of the product. In this case, it is necessary to test the performance of the candle on a special booth. If suspicions were confirmed, the only way out is to replace the set or one candle.

5. There is no gasoline in the tank

You can diagnose the problem according to the fuel level pointer. If he is faulty or there is a suspicion of its "inadequacy", then it is possible to determine the presence of fuel by removing the fuel pump.

6. Pollution of the fuel filter, freezing of water in the system, the fuel wire shift, the failure of the fuel pump

All these faults can be safely attributed to one category, because they all have the same signs - the starter turns the engine, but there is no smell of fuel from the exhaust pipe. If the car is carburetor, then the reason must be sought in the float chamber. Most likely, it is not fuel. In the case of an injector, the presence of fuel in the ramp is easier to check by pressing a special spool (installed in the end of the ramp).

To correct the problem, it is necessary to warmly warm the engine and pump the power supply system with the tire pump. After that, all the tubes of the system, hoses and gas station itself are changed.

7. The fuel pump creates too weak pressure

It is possible to determine such a problem exclusively by special measurements (made directly at the output of the fuel pump). After that, the quality of the operation of the fuel pump filter is checked.

The solution is to clean the filter of the fuel pump, its replacement (in case of impossibility of repair) or the installation of a new fuel pump.

8. Low contact quality in chains

Low quality contact in the circuit on which the fuel pump feeds or the failure of its relay. The first thing to be done to check is to make sure the mass on the car and make resistance measurements using a multimeter. If the resistance level is really overestimated, then the only output is to clean the contact groups, turn the terminals well or set the relay (if the old is defective).

9. Frave of the nozzles or malfunction in the supply system

If there is a suspicion of the failure of these items, it is necessary to check with the help of a multimeter resistance of the windings on the fact of the cliff or inter-touch closure. If the cause of the problem is a malfunction of the ECU, then such a check can be carried out solely on a hundred.

Eliminate the reduction of the engine power for this reason can be in several ways (depending on the depth of the problem) - install a new computer, clean all the nozzles, provide high-quality contact in the electrical circuit and so on.

10. Crash DPKV

DPKV breakdown - crankshaft position sensor or damage to its chain. In such a situation, the "Check Engine" engine malfunction lights. The first thing to be done is to inspect the integrity of the DCE itself, to make sure that the normal size of the gap between the gear crown and the sensor (it should be about one millimeter). The normal resistance of the sensor coil is about 600-700 ohms.

To solve the problem, it is enough to restore normal contact in the electrical circuit and set a new sensor (if the old one turned out to be faulty).

11. Fastered Dzhto

The DRP is a sensor controlling the temperature of the coolant. The symptoms of the fault are the following - the engine malfunction lamp lights up. If the cluster takes place, the system's electric fan begins to rotate continuously. In addition, it is necessary to check the health of the sensor itself.

If the engine power fell for this reason, it is necessary to restore the quality of the contact in the electrical circuit and install the new sensor.

12. FAED DPDZ

DPDZ failed - a sensor that controls the correct position of the throttle (or its chain). As in previous cases, the Check Engine lamp lights up here. If there is a breakdown in the DPDZ chain, the engine turnover is usually not reduced below one and a half thousand revolutions.

The solution to the problem is to clean the throttle assembly and restoring the quality of the contact compound in the entire electrical circuit. In the event that the sensor is faulty and cannot be repaired, it must be replaced.

13. Farmer DMRV

DMRV failed - the sensor responsible for controlling the mass flow rate of fuel. Here is the optimal action - checking the integrity of the DMRV or its replacement for a good device. If the DMRV breakdown was confirmed, then it is necessary to make an attempt to clean it, and in case of the impossibility of repair, it is easy to replace.

14. Cleaning the detonation sensor

Cleaning the detonation sensor. With such a malfunction on the instrument panel, a malfunction lamp will not light up. In addition, when the DD detonation fails, there is no detonation in any of the operating modes of the power node and also drops the power of the engine. With such a problem, the best option is to restore the integrity of the contact group in the electrical circuit and install a new sensor.

15. Fravel of oxygen sensor

Breakdown of oxygen sensor or violation of its chain. Such a malfunction is characterized by the lighting of the "Check Engine" lamp. At the same time, the first thing to be done is to check the heating helix for integrity. First, resistance is measured, and secondly - the voltage level at the output. Measurement can be done even without breaking the chain - it is enough to pour insulation using a needle.

To eliminate the fault, it is worthwhile to repair the oxygen sensor, restore the quality of the wiring and clean all the holes through which the air is suited. In extreme cases, it is necessary to replace the oxygen sensor itself.

16. Depressurization of the exhaust system

Diagnose such a problem is simply - sufficient to inspect the main elements while the engine is running on medium turnover. To solve the problem, it is necessary to replace the graduation collector gasket and stretch all seals.

17. failure of the ECU

The failure of the electronic control unit (ECU). Despite its reliability, the ECU can also break (sometimes it is simply knocked down by its software). To verify in good condition (output of the ECU), you need to believe the voltage on the block itself (the normal parameter is about 12 volts) or replace the well-serviceable block. If the control unit turned out to be faulty, it may be necessary to replace it. In some cases, it is enough to change only the wiring.

18. Violation of the adjustment of gaps in the valve drive

Make sure the parameters can be exclusively by checking with special probe. If the gaps are not suitable norm (written in the manual), then you need to make adjustments.

19. Deformation or breakage of springs on valves

In this case, you will have to remove the cylinder head and measure the length of the springs under load and in the free state. If the broken or deformed springs were detected, they need to be changed.

20. Waved camshaft camshafts

There is enough visual inspection (after removing the necessary elements) and replacing the camshaft if necessary.

21. Draked phases of gas distribution

In such cases, it is necessary to check the fact of coincidence of labels on the distribution and crankshaft of shafts. If there is a "loss", it is enough to establish the correct position on special tags.

22. Low compression levels in cylinders

Low compression level in all or some cylinders. Causes include probable damage to the valves or their wear, breakdown or loungeing piston rings. To make sure of suspicions or disprove them, it is enough to produce the necessary measurements. If the suspicion was confirmed, then it is necessary to repair the power node - to change the rings, pistons, or repair cylinders.

Output

Above lists only part of the faults, due to which the engine power drops. But in most cases it is enough to diagnose the problem, eliminate it and return to its "iron horse" so necessary traction.