The engine is badly gaining momentum - where to look for the problem? Why the washing machine does not gain momentum disruption of the gas distribution mechanism.

The most unpleasant kind of problem is when something in the car broke half. In such cases, the search for a malfunction turns into a complex task resembling Fishing. Common example: the engine does not gain momentum after pressing the accelerator pedal. The car goes, but it is not capable of accelerating to normal speed - the engine "sneezes" and stalls. If you decide to find the problem yourself, read the complete list of the reasons that cause inadequate behavior of the power unit.

Fuel system problems

If you encountered the problem of the power drop in the power of the motor, start searching for a fault from the fuel feed system. After all, if the engine does not respond to the opening of the throttle, either begins to stroke, it is logical to assume that it is not enough fuel trite. Your actions:

1. Remember when a fine cleaning filter has changed and check its condition. The flooded filter element skips an insufficient amount of gasoline, which only enough to work at idle without load.
2. A common reason is a mud mesh benzone pump located in a tank. Often, motorists ignore it to replace, installing only a new filter. To check the grid of rough cleaning, you will have to disassemble the gas tank and pull out the pump.
3. Flaked with a bypass valve pressure dropping the surplus fuel back to the tank. It is checked by measuring the pressure in the fuel ramp through a special fitting.
4. If in a closed garage where the car is stored, the smell of gasoline is felt, go through the entire fuel line, examining for leakage.

Note. The clogged filter indicates a long fuel pump noise, audible after the ignition is turned on. The unit cannot raise the pressure in the highway to the norm and is not turned off for a long time.

More serious malfunctions to detect more difficult. Both gasoline and diesel engine may suffer from improper work or nozzle failure. Their performance is checked by removing and connecting to a power source. The sprayer must create a smooth beautiful "torch", otherwise subject to replacement.

The reason for the flaw in the diesel engine is often the fuel pump, which creates high pressure in the system. When the parts of the unit were worn out, the pressure in the highway falls below the norm, and little diesel fuel is injected into the cylinders.

Together with the fuel filters does not prevent Check and air. Pull the polluted element if it is not possible to change immediately.

Ignition faults

In cases where, when you press the gas pedal, it is heard to the exhaust pipe either the engine begins to "trot" at idle, try to find a problem in the ignition system. Weak sparking on candle electrodes leads to incomplete combustion of the fuel-air mixture and power loss by a power unit. The reasons for the improper operation of the system look like this:

1. Problems with one or more high-voltage coils.
2. The insulation of high voltage wiring, coming from coils to candles.
3. Due to the long period of operation, the candles were worn out.

Cunning of worn candles is that in the process of tests they give a normal spark. But in the motor cylinders there is a high pressure, in which old candles fade. That is why the engine does not develop revolutions, and the sharp pressing of the accelerator pedal causes the "failure". Checking the candles is necessary on a special stand that creates no less than 20 bar.

Diagnose the trigger of high-voltage wire or insulation of the candle can be in a dark garage. Open the hood, boot the motor and watch it. If you notice the flashes of the sparks on the cradle, put new parts.

The exhaust of the coil or the cutting of the high voltage wire indicates a complete refusal of one of the cylinders. Testing the wire is easy: change it places with the neighboring and make sure that another cylinder stopped working. With the coils, this reception will not pass, for diagnostics you need special equipment.

Problems with engine

The critical wear of the cylindrophone group of the power unit also leads to a reduction in power. There are other reasons why the engine is badly gaining momentum:

• valve exercise in one or more cylinders;
• no compression or its fall below the permissible level;
• improper adjustment of heat gaps between the rods of valves and rocker;
• problem or chain drive of the gas distribution mechanism.

Most of the listed faults are detected by measuring compression. The burned valve does not completely sit in the nest, which is why the pressure in this cylinder drops to 2-3 bar, and sometimes to zero. The overall decrease in compression in all cylinders to the mark of 9 bar and less points to "stepped" piston rings.

Council. Before you announce the verdict with a cylindropional group, it is worth checking the thermal gaps with a dipstick. If a recently some "specialist" made irregular adjustment and clapped the valve, then the compression will also decrease.

Such errors occur when replacing the chain or timing belt, when the labels are shifted to 1 tooth. Consequences - Violation of the phases of gas distribution and power loss plus unstable operation of the engine. With such an effect, there are negotiable drivers who do not follow their own machine: from wear chain (belt) is very stretched and jumps on the gear of the camshaft by 1 tooth.

Too high oil consumption penetrating in the combustion chamber through valve glands, also worsens the conditions for the operation of the power unit. From the inside the walls of the chamber and the electrodes of the candles are covered by nagar, and the piston rings are covered and locked. The correct sign of the malfunction is the Clubs of the Size of the exhaust pipe.

Other malfunctions

The modern car is equipped with an electronic system of controlling the power unit and the neutralization of flue gases. Since the technical condition of these systems does not directly affect the operation of the engine, the power loss may occur for such reasons:

• destruction and complete obstruction of the catalytic neutralizer installed in the exhaust path of the gasoline motor;
• the clogged diesel filter leads the same consequences - the exhaust gases have nowhere to go and the power unit "suffocates";
• the failure of one or several sensors associated with the electronic control unit.

Checking the passability of the neutralizer and the particulate filter is simply performed: unlock the front flange of the device by opening the way the exhaust gases and start the motor. If its work is significantly improved, change the catalyst to the new or.

When the lambda probe fails, the engine does not gain momentum on the controller command. Not "seeing" the amount of oxygen at the output, the electronic unit cannot be properly prepare the fuel-air mixture, so it turns into an emergency mode. The mixing of fuel with air occurs according to the established indicators, which reduces the power of the motor.

The transition to emergency mode is accompanied by the inclusion of the CHECK ENGINE scoreboard on the dashboard. The fault happens whenever it fails one of the main sensors - DMRV (in new cars - DDA), lambda probe or the sensor of the throttle position. To check the performance of these devices, it is better to refer to a competent auto electrician or per service station.

One of the signs of engine malfunction is usually the fact that the engine is not gaining momentum ("not unwound", as many motorists say). The reasons for the fact that the engine is badly gaining momentum, can be a lot, the exact diagnosis can only be delivered by an experienced diagnostic, but the initial check can be carried out independently. So, for what reasons, the engine is not gaining momentum?

The engine is not gaining momentum. What to check first?

Fuel supply system. Usually, the reasons for which the gasoline or diesel engine does not gain momentum begin with it. If we are talking about a gasoline engine, then in the first place it is necessary to check the serviceability of the fuel pump - it does not matter, it is mechanical or electric.

Diesels are tested from equipment with nozzles, because it is most often the cause of power loss by the engine. In addition, the likelihood of air suction in the fuel system should be excluded.

Like gasoline and diesel engine stands as he could score and influence the engines.

Ignition system. To start, check whether the engine does not trite. Then remember whether the belt or the timing belt has not changed. Very often, the belt or the timing chain is installed incorrectly, which is why the engine does not gain momentum and "tupit".

In addition, it should be carefully examined by wires and candles to make sure of their integrity and health. The engine craving can also influence the failed sensor (DMRV, DHX, the crankshaft sensor, the camshaft sensor, the throttle position sensor, etc.).

Air supply. Another common reason for which the engine is not gaining momentum is the air climber on the way of fuel-air mixture into the cylinders. In addition, it follows.

Exhaust system. Many cars significantly affect the thrust, so that the exhaust system is checked from the catalyst (if it is).

Another very common reason why the engine is not gaining momentum is bad fuel. If you refrain on an unknown refueling, perhaps the problem is precisely as fuel.

If all of the above is normal, then for a more detailed study, it is better to refer to the specialists who can accurately determine the cause of the fault.

For each motorist, it is important that its vehicle worked properly, and without any problems it was able to develop their own optimal power. However, for a number of reasons, the power unit of the car over time can stop typing the number of revolutions necessary for its normal operation. In this case, the car will lose their former incision, and its traction qualities will significantly decrease.

Signs of trouble

Determine the lack of the number of revolutions is quite simple and each driver is able to distinguish the normal power of its car. The reduction in power is always accompanied by a deterioration in the dynamics, traction, weak acceleration, as well as high-leveling. Often, a car with this problem spends much more fuel, and exhaust gases may have either black.

A good motor always reacts to pressing the accelerator pedal and begins to develop more revolutions. If this does not occur or a tangible difference is not observed, then you should pay attention to both the engine and the fuel system.

As for the faults, due to which the power unit is not capable of typing the required number of revolutions, it is worth noting, there are quite a lot of them.

Insufficient heating of DVS

First of all, it is necessary to understand that the immense engine is unable to fully function. For this reason, before starting the movement, it is recommended to give the unit to work in idle mode for several minutes or start moving on a cold engine without rapid acceleration. But it is worth remembering that if the car is equipped with a carburetor engine, it is better to give preference to warm up than a gentle start. Otherwise, the movement may occur, and the motor can stumble.

If this system fails, it will not be possible for their own forces and should be visited by car service.

Carburetor Engine

In the case of a carburetor, everything is somewhat simpler - an angle is set exclusively in manual mode, scrolling the ignition distributor. It is quite difficult to install it quite difficult, but still possible.

If the ignition of the mixture occurs when the piston is in the upper dead point, the explosion of the mixture will occur when it starts downward. In order for this not, the ignition angle is adjusted. To properly set an angle, it is necessary to identify the compression tact in the first cylinder. To do this, you can take a piece of the rolling, and clog the cylinder candle hole. After that, the crankshaft scrolls for the crown and at the beginning of compression, the roller will fly under pressure. At the same time, the labels on the pulley and the frontal lid should correspond to each other. When the labels came together, it is necessary to pay attention to the rotor of the tramblor, it should be directed precisely on the contact of the first cylinder (the numbering of the cylinders is indicated on the lid of the trambl.). In the event that this is exactly the case, then the ignition angle is in order.

Further, when the error is detected, you must send the bottom nut locking the trambler. After that, slightly raising the battery, you should scroll the rotor until it becomes the first cylinder contact. By installing the rotor, the fixing nut can be tightened, but not to the end.

Now the ignition angle is adjusted. This is done as follows. Tester, or the control lamp is connected to the plus terminal of the ignition coil and to the "mass" of the car. Ignition turns on, and configuration begins. For this, the rotor is pressed with one hand, and the other slowly scrolls the vacuum knob clockwise, until the control lamp goes out. After in the opposite direction, the housing of the distortion is scrolled until the lamp ignition or detect readings on the tester. As soon as it happened, scrolling is completed, and the nut is tightly tightened. Thus, the ignition advance angle on the carburetor engines is adjusted.

The level of gasoline in the float compartment of the carburetor

In the process of forming the fuel-air mixture, the fuel limit in the carburetor float chamber plays a huge role. At a low level, the number of gasoline in the mixture is noticeably decreased, as a result of which the inability is unable to develop sufficient power. When the level of the high fuel mixture is enriched, but fully warm up before getting into the cylinder it is unable, which is also reduced, the rejection decreases.

In order to adjust the fuel level, it is enough to bend the fastening of the float in the desired direction to the required limit.

Problem in the accelerator pump and clogging of highways

When diagnosing, it is important to pay attention to the state of the accelerator pump, because it is due to its reliability, the engine responds to pressing the accelerator pedal. The jets located in the pump in the normal state should serve the fuel of a thin flowing.

Check it is quite simple. It is necessary to dismantle the air filter in order to open the first chamber overview. After that, you should open the throttle and keep it in such a state for several seconds. As a result, a powerful and thin jet of fuel will be released from the jetwork, which should be focused clearly into the second chamber. In case the trickle is weak or goes unevenly - the jetwork is clogged and requires urgent cleaning.

Air subcosition in the intake manifold

Among other things, the reason for a significant drop in the speed of the power unit can also be the usual air intake in the intake manifold. At the same time, the motor is badly started, troit, increases gasoline consumption, problems occur even at idle. This is due to the fact that excess air additionally penetrates into the fuel mixture.

Find out that the injection unit has ceased to fully develop the turnover for this reason is quite difficult, and even more difficult to find the place where the air passes. This is most often due to the depreciation of the collector laying. To check, you can abundantly cover the docking place of the collector fuel using a syringe throughout the connection perimeter. Next, the engine should be launched and if it turns out to develop normal turnover, it means that the problem is lifted here.

However, it is worth understanding that this method is quite primitive. For a full diagnosis of the intake manifold, it is recommended to visit the car service, because it is very difficult to do it yourself.

Violation of gas distribution

When the timing belt is broken, the phases of gas distribution in the unit occurs. It happens after it is replaced if the new belt was installed with a displacement of at least one crankshaft and camshaft gear. In this case, the cycle of the operation of the engine is violated, the consumption of fuel increases, and the exhaust acquires various colors due to the defective combustion of the mixture.

Due to the fact that the replacement of the belt requires certain knowledge of the engine, to entrust this procedure better by car service, and not attempt to set the cycle yourself.

Low compression

Perhaps the most serious problem due to which the engine power is reduced - reduction.

This happens when the details of the piston group are worn. The consequence of this problem is the loss of energy during the operation of the OI. Compression is checked by a compressometer, and if the indicators are lower than optimal, this problem requires the mandatory overhaul of the engine. The norm is considered compression within 10 - 14 kg / cm2, but for each car it is its own and specified in the documentation.

When operating a car with a gasoline or diesel engine, sometimes the situation occurs when the accelerator of the expected increase in revolutions does not occur when the accelerator pedal is pressed. A good force unit must instantly respond to an increase in the combustible mixture in combustion chambers with an increase in the frequency of the crankshaft revolutions, but if this does not happen, you need to look for a fault. Its reason can be both fairly simple and easily eliminated things and serious breakdowns.

The main causes of the lack of engine dynamics

The driver constantly operating the car easily determines the deterioration of the dynamic characteristics of the motor, which is manifested in the sluggish acceleration, bad thrust, increased fuel consumption and oil. These processes are often accompanied by the appearance of a SIZO or black exhaust. Most often, the following reasons serve as guilt:

1. Insufficient warming of the power unit.
2. Poor quality of the fuel used.
3. Air filter clogging and air supply system malfunctions.
4. Malcyal operations of the gas distribution mechanism.
5. Fault fuel failure.
6. Fault sensors.
7. Faults of the ignition system.
8. Weak compression in the cylinders.
9. Incorrect work of the car.
10. Specific motors of engines with turbocharging or carburetor.

Cold Engine

The dynamic characteristics of the power unit will not reach its maximum, while the working temperature of the coolant will not rise to the value in 90 o C. The cold motor is unable to quickly develop turnover, for this, the air-fuel mixture in the combustion chamber should be heated. Otherwise, the engine will stroke, twitch and detonate.

Fuel quality

The use of high-quality gasoline or diesel fuel is the key to the long-term life of the engine and obtaining maximum power indicators from it. But none of the drivers are completely immune from refueling with poor-quality fuels, the use of which threatens not only a significant reduction in the power indicators, but also lack the ability to start the engine. The regular use of poor-quality gasoline is manifested in the intensive formation of nagar on cylinders, pistons, catalyst and in the graduate manifold, as well as in increased wear of the cylindrophone group.

Filter pollution

Excessive air filter clogging reduces the amount of air that can pass through it in the combustion chamber, which is why the engine power drops, and its work becomes uneven. A similar investigation causes a lack of fuel flow in combustion chambers when a fuel pump malfunction or the difficulty of passing it through a highway or through fuel filters for various reasons.

Violation of the gas distribution mechanism

The breakdown or incorrect adjustment of the gas distribution mechanism shifts the gas distribution phases from the optimal point, and causes a sharp decrease in the engine power. This happens because of the incomplete release of cylinders from exhaust gases, or insufficient filling with air or air-fuel mixture. Resetting a chain or timing belt to one or more teeth causes a disruption and adjustment of the mechanism that provides the necessary ignition advance angle depending on the engine speed. A significant power drop is observed and when the timing valve is improved when they are lack of opening or not complete closure.

Fuel system malfunctions

With the problems of the power supply system of the gasoline engine, the loss of power is felt first. These include clogging of fuel filters, interruptions in the operation of the fuel pump, nutrition of the nozzles and the depressurization of the fuel line, due to which the engine feels a lack of fuel. In diesel engines, the most frequent fuel equipment malfunctions are the wear of the nozzles and the fuel pump, the depressurization of the fuel line, freezing the fuel in the fuel line and clogging the filters.

Fault sensors

In modern engines to achieve a combination of high dynamics and a low fuel consumption, the testimony of various sensors determining the position of the crankshaft, air flow, detonation in the combustion chamber, the composition of exhaust gases, the position of air and throttle, external temperature is used. The data from them come to the ECU of the engine, and affect the mode of its operation. A malfunction of a sensor makes the operation of the power unit not optimal, which is manifested in the power loss.

Faults of the ignition system

Most often in the ignition system, the problems that reduce the power of the engine relate to the candles in which the gaps between the electrodes can be broken, there was a nagar on them or an insulator is damaged. The deterioration in the quality of the spark or its absence is often a consequence of the breakdown, violations of contacts or the integrity of high-voltage wires, ignition coils and distributor.

Worn piston group

With long-term operation of the engine, there is a natural wear of the piston group, which causes a drop in the required compression in the cylinders and power of the power unit. Excessive wear can occur when the piston rings occurs due to improper operation of the engine, the use of poor fuel and oil.

Problems in the work of the ECU

All the processes of operation of the modern car performs an electronic unit that collects sensor readings, and on the basis of the program laid in it regulates the engine operation. The functioning of the ECU can be changed by setting up various modes of operation depending on the required flow rate and type of fuel used, the operating conditions of the car and other characteristics. Problems in the electronic block or its improper setting can lead both to the loss of power and the impossibility of the operation of the engine itself.

Specific engine faults

Old models of cars having a carburetor are still quite actively exploited by domestic motorists. The breakdown of various nodes of such power systems is manifested in a noticeable drop in engine power, and has the following characteristic faults:

1. Flames of fuel pump causing a pressure drop in the system.
2. Hit into the dirt carburetor, which is why jets are clogged and problems with the work of the needle valve arise.
3. Incorrect adjustment of the composition of the combustible mixture.
4. Violations in the work of the carburetor dampers and the economizer valve.
5. Wrong work float.

Some models of new motors have one or more turbines, pumping air into the combustion chamber, thereby increasing the amount of horsepower that the power unit is capable of issuing. Breakfast or violations in their work causes a sharp drop in the pickup of the power unit.

The engine power drop should cause a car diagnostics to identify a malfunction and complete elimination. Well, if the cause of the loss of dynamics will be such easily disposable causes, like poor-quality fuel, clogged filters or old spark plugs. But malfunction in the work of the gas distribution mechanism, the wear of the piston group and other more serious problems require immediate repair, as they can lead to a significant breakdown and significantly higher monetary costs.

Many motorists faced the problem of unstable engine operation: not gaining momentum, does not develop enough craving, sneezes. It is necessary to urgently look for problem problems, otherwise the motor can simply "die".

Possible malfunctions

Why does the engine do not gain momentum? The reasons for unstable operation of the engine may include problems in various systems of the car and (DVS).

Among the possible malfunctions in electrical circuits and electronic sensors, reading OBS parameters, the state of the gas distribution system (valves, switchgear drives mechanisms), the serviceability of the crank mechanism and the fuel supply, and the intake and exhaust system, and the fuel supply systems and purification systems are played.

Interesting to know! If you have an electronic ignition system control unit on your way, you can reach the nearest service station using the Hall sensor, which is located next to the electronic control unit.

Electrical part

Pay attention to the rubler, the ignition coil and high-voltage wires. Measures on the wires (for the subject of the cliff) do with an ohmmeter or a control light. If the glow of the bulb is missing - look for a wire break.

Ballast resistance can also cause the engine badly gaining momentum. The ribbed unit under the windshield is a ballast resistance. Having found a malfunction in ballast resistance, it is necessary to replace it immediately, since it is not subject to repair (you can, of course, try to repair it in a specialized workshop).

Check the traver body for mechanical damage and chipping, coal contacts of the central electrode. Resistance to the lugs of the candles check the melometer. If the problem persists, try adjusting the ignition advance angle. By installing a rubber into a neutral position, slowly turn it left / right - the engine operation will change.

One of the reasons why the engine does not develop revolutions is the fuel system. In the fuel supply system for gasoline engines, a gas station is played by one of the main roles. You should also check the fuel filter (if necessary - replace it). The filter may not pass fuel due to the presence of water or mechanical impurities in it.

The operation of a diesel engine depends on the operation of fuel equipment and nozzles. The failure of the sprayers of the nozzles or plunger pairs of the fuel pump affect the engine power, up to the point that the motor does not start at all.

Ensure that there are no fuel leaks in the fuel system. When leaking fuel, look for the cause in leakage. The fuel filter of the diesel engine in the summer may not pass the diesel fuel from behind the water that has accumulated in the filter, and in the winter, due to the use of poor-quality winter fuel, there may be paraffin deposits, therefore it should be changed.

Engine electronic control system

Modern engines to ensure low fuel consumption and high acceleration dynamics of the car have many electronic systems that determine the position, the detonation of fuel in the combustion chamber, the position of throttle and air dampers, depending on the engine temperature and the external temperature, on which mode does the engine runs ( Overclocking or Nakat - forced idling system).

The state of these systems affects the quality of the engine, its economy. Sensors of these systems are located in various places on the engine and the workpiece, and the operation of the car depends on their high-quality work.

Other reasons

For reasons not directly related to the state of control and engine control systems, problems with air supply systems, exhaust gas supply, fuel quality can be treated.

The condition of the intake system affects, in what conditions the car is operated. When moving in zones with high dust content, the replacement of air filters must be produced more often than the manufacturer recommends.

When the filter is "clogged", there is a depletion of a combustible mixture in the engine combustion chambers.There is incomplete combustion of fuel, or, as they say, the engine overflows. In the candlelight is formed a nagar, the traction characteristics of the engine will deteriorate.

If during operation, the fastening of the elements of the intake system is weakened, the air seats occurs, the exhaust gas recycling systems are working incorrectly, the fuel mixture is imposed due to excess air, the engine does not develop full power. In this situation, it is necessary to check the condition of fastening the intake manifold and the carburetor.

Exhaust system

Attention! If the machine has a catalyst, then check the exhaust system from it. Check the status of the lambda probe, the condition of the catalyst, is not "scored" whether it (due to the poor quality of the fuel on it can form a naar). With a faulty catalyst, the exhaust gases from cylinders will not completely exit, which will lead to poor filling of the combustion chambers by the air-fuel mixture and lower the engine power.

In disruption of the tightness of the adjustment of the exhaust manifold, a breakthrough of exhaust gases will occur to the cylinder block into the open space, which can lead to engine overheating, incorrect operation of electronic systems. This problem can be eliminated by tightening the collector or replacing the gasket under the intake manifold.

High-quality fuel is the key to the health of your car. But none of us is insured that there will be no low-quality fuel on some refueling. Sometimes with poor fuel, the motor is not just junk, but also refuses to start. In this case, all fuel merge, and rinse the tank. About bad fuel will be told by the engine candles: if there is a redhead flare on the contacts of the candle and the "skirt" of the central electrode, then the fuel is good. Black Nagar on the candle talks about low-quality fuels with a high content of impurities. Availability of Nagar worsens the quality of the candle.