Why troit engine reasons. Why does the engine run hot. Ignition timing not adjusted

Before you start looking for the causes of this problem and find out what it can lead to, you need to figure out what it means to troit the engine. Otherwise, this phenomenon is called "missing" and means interruptions in the operation of one or more engine cylinders internal combustion. The term "troit" owes its appearance to the four-cylinder internal combustion engine. If one of the cylinders fails, only three work. As a result, the motor does not pull, it becomes especially noticeable during acceleration. At present, a six- and even a twelve-cylinder power unit can “troit”, although this is not entirely true from the point of view of the Russian language. As a visual aid, you can find a video of a tripping engine on the Internet, there you can also find a video on what to do in such situations.

It is possible to understand that the motor has zatroiled by the changed sound of its operation. You can hear it especially well if you stand next to the exhaust pipe.

Other signs that accompany a malfunction are unstable idle, body vibrations, increased fuel consumption and loss of power (engine does not pull). Since each of the accompanying symptoms is also characteristic of other problems, they need to be considered only in combination.

You need to find out why the engine is troiting as soon as possible, since the consequences of untimely repairs can become so serious that, in the end, you will have to change the entire engine assembly.

Why is the engine troit

At first glance, the causes of the problem lay on the surface: either there is nothing to burn in the cylinder, or there is nothing to ignite the working mixture with. However, this is only at first glance. In fact, it can be very difficult to understand why the engine suddenly started to triple during startup or acceleration, and the search for the “root of evil” can take more than one day, especially in garage conditions.

It is important to pay attention to the conditions under which the engine does not pull, when it starts to triple more: cold or after warming up, when driving under load or on idling, at low or high, during acceleration or with uniform movement. Any little thing, often seemingly irrelevant, can become a hint.

So, why does the engine troit? The main reasons for this malfunction are as follows:

incorrectly set ignition timing;
suction of atmospheric air into;
faulty spark plugs (the most common cause);
punched high-voltage wires;
faulty capacitor;
air leak in the intake manifold;
burnout of valves or pistons;
broken, worn or deformed piston rings;
violation of the gas distribution phases;
heavily worn valve rockers;
burnout or breakdown of the cylinder head gasket;
worn out valve stem seals(hardened, pierced or completely destroyed);
improperly adjusted carburetor;
worn breaker-distributor shaft or rotary plate bearing;
clogged air filter;
loss of tightness due to deformation or wear of the membrane of the vacuum ignition timing regulator;
the use of spark plugs that are not suitable in their parameters for this motor.

Search for a broken cylinder

This task is not difficult. The only thing that needs to be done is, with the engine running, disconnect the high voltage wire tips from the spark plugs one by one. If you turn off the working cylinder in this way, the sound of the motor will change, but if after disconnecting the tip the sound remains the same, then a non-working cylinder has been found.

Disconnecting high voltage wires, care must be taken as the risk of electric shock is very high. This is not fatal, of course, but very unpleasant. First, you need to put a dielectric material under your feet, such as a dry board or a rubber mat. Secondly, you need to disconnect by holding on to the wire itself, and not to the cap. Thirdly, it is impossible to touch the car body during the procedure.

A detailed analysis of the causes of engine tripping

Although a trotting motor shows the same signs every time, it is much easier to solve the problem if you know the specifics of the causes of this phenomenon. The main reasons for the failure of one or more engine cylinders were listed above. Because of them, the motor does not pull on high revs, strongly troit on small ones, at startup, or overclocking, after warming up or on a cold one. Let's consider them in more detail.

Incorrect ignition timing

If the motor troit for this reason, then a kind of pat is heard, in which the engine bounces. In order to accurately establish this malfunction, you need to listen to the motor at low speeds, since at high speeds its work is leveled off, and skipping cycles become invisible. As a rule, the above signs indicate excessively early ignition. This is confirmed by the jerks that the engine makes when it is turned by the starter.

Atmospheric air leakage in the vacuum brake booster

If the car has a vacuum brake booster, air leakage occurs when the diaphragm, hose or valve is damaged. Excess air appears in the system, which mixes with the working mixture, depleting it. As a result, the mixture in the cylinder may not always ignite. The candle, in turn, gets wet and cannot form a normal spark that can ignite the air-fuel mixture. This malfunction is quite difficult to identify, since there is no special equipment that can determine exactly where the tightness of the vacuum booster system is broken.

Faulty spark plug

An accompanying symptom that confirms the hypothesis that the spark plug is the cause is the fact that a cold engine troit is stronger. After warming up, the problem often disappears or becomes less pronounced.

After the problematic cylinder is found, it is necessary to unscrew the candle and inspect it. The spark plug is a health indicator power unit. Her condition can say a lot, and timely troubleshooting measures will help prevent serious consequences for the motor.

First of all, you should pay attention to the color of the central electrode insulator. Determining a normally working candle is not difficult. The normal insulator is light or slightly brownish. If the color of the insulator is different from normal, then you need to find out why. Traces of oil or soot on the insulator indicate that a re-enriched mixture enters the cylinder, which fills the candle, or it is “thrown” with oil. As a result, normal sparking is disrupted.

The reasons for this may be different:

the engine runs a lot at idle when warming up;
the check valve of the power supply system is faulty;
low compression in the cylinder;
disturbed valve timing;
injector malfunctions;
failure of the oxygen sensor.

After the insulator, you should inspect the body of the candle. It must be intact, without chips or cracks. Particular attention should be paid to the presence or absence of vertical black bars and black dots. If they are, the candle breaks through, and it must be replaced.

Finally, the quality of sparking is checked. Moreover, simply closing the side electrode to ground is not enough, so you can only check the performance of the candle. To understand how well a spark plug works, you need to hold it at a distance of one and a half to two centimeters from the mass and turn on the starter. If a large spark of bright blue color forms between the electrodes, the candle is working properly. A weak spark or its complete absence indicates that the ignition coil or switch is faulty, or the high-voltage wires have increased resistance.

On the Internet you can also find videos with detailed instructions for checking spark plugs.

Punched high voltage wires or capacitor

In the event of a breakdown of high-voltage wires, the engine, as in the previous case, usually trips to a cold one. After warming up, the problem either disappears completely, or becomes less pronounced. A strong tripping of the motor to a hot one, as a rule, indicates other problems.

The easiest way to determine the breakdown of high-voltage wires or a capacitor is to observe them in complete darkness with the engine running. Sparks testify to breakdown. You can replace the capacitor and wires, in whole or in part. Also, the health of high-voltage wires can be checked by measuring their resistance with a multimeter. For a normal wire, it does not exceed 20 kOhm. It should also be remembered that it depends on the length of the wire, so all wires will be different.

When visually inspecting the wires, pay special attention to their lugs. They should be solid, without a light gray coating on the inside and without gray-brown dots on the outside.

Air leak in intake manifold

This reason speaks of other problems of the power unit and is their consequence. The fistula occurs either after repair due to improper assembly or due to gasket wear. Under load, the problem tends to get worse.

Burnout of valves or pistons

Reveal this problem only possible by measuring compression and then disassembling the engine. Due to the great complexity of the work, checking the engine for burnout is carried out last, when everything else has already been checked. In this case, the motor always troit: cold, hot, under load and at idle.

Broken, worn or deformed piston rings

This error occurs infrequently. To check you need in the cylinder. After measuring, pour a little into the cylinder engine oil and make a new one. If the compression has increased, then it is in the rings. This malfunction can lead to overheating of the engine, therefore it is necessary to eliminate it as soon as possible.

Incorrectly adjusted valves or badly worn rockers

Due to incorrect adjustment of the valve, they stop opening and closing in a timely and complete manner. As a result, not the entire volume of the working mixture enters the cylinders, and not all exhaust gases are removed. As a result, the motor starts to troit.

In addition, carbon deposits are increased in the cylinder. The degree of valve opening is also affected by the condition of the rockers. If they are badly worn, the valves also stop opening or closing completely.

In the presence of this malfunction, the engine troit more strongly when warmed up. After warming up, due to the thermal expansion of the parts, the gaps decrease, and the hot motor starts to run smoother.

Faulty distributor

It also happens that the cause of a tripping engine is a distributor, or rather, its worn shaft, bushings or bearings of the turning plate, all this leads to a gap between the contacts and skipping cycles. Often, when heated, the motor troit less or stops troit altogether. This is explained, as in the previous case, by a decrease in gaps.

Clogged air filter

Due to heavy pollution, the filter passes air worse, which leads to a violation of mixture formation (the mixture is over-enriched). As a rule, the operation of the motor returns to normal immediately after replacement. air filter. Stronger engine starts troit on a cold and after warming up under load, when it needs more air.

What to do in the first place, if the motor has stopped

Summarizing all of the above, you can make a small instruction on what to do when symptoms of a tripping engine appear.

First of all, it should be noted when it starts to triple: at startup, while cold or after warming up, at low or high speeds, during acceleration or without load. It is also important to take into account in which cases the malfunction is more pronounced, and only after that proceed with the search for the cause.

If the engine troit more when starting or when cold, you need to start searching by checking the candles and high-voltage wires. If the problem is more pronounced after warming up or under load, it is better to first check the condition of the air filter.

Other possible causes are best checked as the work becomes more complicated.

It is well known that the engine starts to triple if one of its cylinders stops working. But a non-working cylinder is only a consequence of the problem, but why did it stop working? If the engine is carbureted, then the cylinder does not work in two cases: either the fuel mixture does not enter it, or there is no spark. Everything is clear here.

However, the operation of injection and diesel engines is electronically controlled, and, in this case, the cause of the problem does not always lie in the cylinder itself - it can be both in the cylinder itself and in electronic sensors. If any sensor malfunctions, the cylinder may also stop working, and then the engine troit - to a cold or already heated state. If the car is new, and tripling has appeared, then it is better to immediately go to the service station.

Signs of a non-working cylinder (engine tripping)

Almost each of the symptoms listed below, when considered separately, may also indicate other engine or powertrain malfunctions. Therefore, in order to diagnose exactly the engine tripping, all these signs must be taken into account in a complex (See the video "Engine troit on a cold" below).

1. Idle speed floats, vibration is felt in the engine - this is just a sign of an idle cylinder. Body vibration may be observed.

2. When checking the spark plugs, it is clear that some kind of spark plug has darkened and soot has accumulated on it.

3. Changed the sound of the exhaust.

4. Both at low and high speeds - at the engine weak dynamics overclocking.

5. Increased fuel consumption.

6. The engine speed is floating, the tachometer needle is twitching.

7. Jerks with increasing speed.

What is the danger of engine tripping?

Some drivers, out of ignorance, at first are not particularly worried about the changed sound from the exhaust pipe and the vibration that has appeared in the engine, but in vain, because the fuel consumption when the engine is running (it doesn’t matter if it’s cold or already hot) increases very much - by 50- 100%. Agree, the blow to the pocket is palpable.

In addition, the fuel mixture that did not burn in the failed cylinder adversely affects the catalyst, and also penetrates the crankcase and mixes with engine oil, degrading its quality.

The increased load falls on the crankshaft, cylinders and pistons of the engine, therefore, the service life of these elements is reduced. Thus, it is very important to identify and eliminate the cause of engine tripping in a timely manner in order not to bring the matter to costly engine repairs.

Why is the engine running?

1. Faulty spark plugs (Check for faulty spark plugs).

2. Air suction: a) in intake manifold, b) c vacuum booster brakes.

3. Valve burnt out, valve rockers worn out.

5. There is a malfunction in the ignition system (how to check the injector ignition module, how to check the carburetor ignition system).

6. The membrane of the vacuum ignition timing regulator is deformed.

7. Incorrect operation of the phases in the timing, due to broken valve clearances (how to adjust the valves).

8. Air filter clogged (change air filter).

10. Rotary plate bearing failed.

11. Faulty ignition distributor shaft.

12. Piston burnt out.

13. The carburetor is incorrectly adjusted (how to adjust the VAZ carburetor).

How to identify a broken cylinder?

The serviceability of each of the cylinders is determined by disconnecting the tips of the high-voltage wires from the spark plugs. Dismantling additional equipment, in order to gain access to high-voltage wires, is not required - they are under the hood, in plain sight.

Safety precautions when working with high-voltage wires. Before the procedure, you need to put a rubber mat under your feet. The hand must be taken by the wire itself, and not by its cap. Do not touch the bodywork with your free hand and do not lean against the bodywork.

So, you need to disconnect the tip of the wire from the spark plug and carefully listen to the sound of the engine. If the sound has changed, then this cylinder is working, and vice versa - if it has not changed, then the engine is troit precisely because of this idle cylinder.

What to do if the cylinder does not work?

The simplest thing is to replace the spark plugs and wires, any driver can handle this on their own. Useful troubleshooting links are provided in the article above. More serious tasks such as checking fuel system, cleaning the engine and replacing its individual elements, must be performed by specialists.

Video: Engine troit cold

Engine troit (engine tripping) is a definition that should be understood as a malfunction when one or more cylinders do not work partially or completely. In other words, the combustion process fuel-air mixture in individual cylinders is broken, which causes unstable operation of the motor on Idling, under load and in transient conditions.

Engine tripping manifests itself in the form of increased vibrations of the power unit, the engine noticeably loses power. Misfires may be observed, which are accompanied by strong pops in the exhaust system. The motor can triple both occasionally and constantly, only at idle or under load, cold, hot, etc. Next, we intend to answer the question of what engine tripping is, and also consider the main reasons why the engine starts to triple.

Why does the motor start to thrive

Let's start with the fact that engine tripping is a violation of the combustion of the mixture in the cylinders, which is accompanied by a clear increase in vibration. Please note that the appearance of ICE vibrations is not necessarily triple, as there are a number of other reasons why the engine vibrates a lot.

In the list of the main malfunctions, as a result of which the engine troit, the following are noted:

submission of insufficient or excess fuel into the cylinder;
supply of insufficient or excess air;
malfunctions of the ignition system,;
wear or breakdown of the motor, which is accompanied by a decrease in compression;

In other words, the engine starts to triple as a result of an inappropriate composition of the fuel-air mixture, untimely ignition of the mixture or the inability to ignite the charge, as well as a violation of the conditions normal combustion mixture as a result of mechanical wear or breakdowns of the engine itself.

Based on these data, it is possible to narrow the scope of the search and the number of systems for diagnosis. The check should begin with and the injector, then the air supply is checked and. In some cases, engine tripping may also be the result of a failure of one of the sensors.

Troit engine: ignition of the fuel-air mixture is broken

The most common cause that causes the engine to triple is late or early ignition, as well as a weak spark plug. At the initial stage, unscrew the spark plugs for a detailed inspection. If damage to the insulator or other defects is noticeable, then the candle should be replaced.

In the case of a damaged insulator, the damage site is clearly visible, since this area turns black. You should also pay attention to the condition of the central electrode and evaluate the gap of the side electrode.

In this case, it is necessary to measure the compression in the engine, after which the unit is disassembled for detailed diagnostics and repair. In conclusion, I would like to add that the operation of a motor with an idle cylinder is prohibited, since driving with such a malfunction leads to a number of additional problems, which greatly complicates and makes subsequent repairs more expensive.

If the engine is unstable, then such a phenomenon is called “missing” abroad. For our ear, the word is overseas and not understandable to everyone. Experienced mechanics know what it is. Missing - misfire combustible mixture in one of the cylinders. More often, drivers in this case say that the engine is troit. In this article, we will find out what are the causes of the occurrence and what ways to eliminate the defect are possible.

Troit the engine: the main reasons

Engine tripping is accompanied by “thumping”. The sound is quite distinct and recognizable. It is he who signals a non-working cylinder. Engine temperature rises quickly. . The power unit is subjected to rapid wear. Therefore, it is important to determine why the engine is troiting and fix the problem as soon as possible.

Spark plug

Checking high-voltage wires is mandatory when diagnosing an engine when it is troiting. They should not show signs of breakdown. Candle tips must be clean and free of carbon deposits.

After a visual inspection of the candles, check the high-voltage wires. They should not have traces of breakdown: black dots and stripes. Due to the breakdown, the current does not reach the candles. This defect is the next reason for the tripping of an internal combustion engine.

Self-checking the wires will not cause difficulties. They are tested with a conventional multimeter. You need to measure the resistance of each wire.

Video of checking BB wires

Check the wires with a multimeter. Measure the resistance of each wire. It differs on different brands of car, but does not exceed 20 kOhm. Serviceable wires have the same resistance. If one of them shows much less or more, then it is faulty and because of it the power unit is troiting.
ignition module

The ignition module is often the third reason for the tripling of the power unit. You can check it, but on special equipment and with experience. You should not test the module yourself.

Video of checking the ignition module

Engine only runs when cold

There are times when the engine troit to the cold. If you are convinced that the candles and wires are in order, then check the ignition module. Without skills and sufficient experience, such diagnostics should not be done by hand.

You can get an electric shock or burn the module, engine control unit.

If you suspect that the engine tripping occurs due to a malfunction of the ignition module, then contact the help of specialists.

Malfunction of the injector or nozzles

The injection engine troit in such cases:

The injector is faulty, but this is very rare.

Filled with bad gasoline or incorrectly used fuel system cleaner.

Clogged nozzles.

The injector power supply circuit is open or shorted.

Engine diagnostics and a competent minder will help to eliminate such malfunctions. For self-checking the injector and nozzles, experience and special equipment are needed.

low compression

Troit the engine due to insufficient compression in the engine cylinders. The decrease occurs: when the rings lie on the pistons, the valves burn out. Some car models allow valve adjustment. Incorrectly set gaps are the cause of tripping of the injection engine.

Finally

If you triple the engine, one or more cylinders do not work, do not rush to go to computer diagnostics. Checking with a scanner will fix the misfire, but will not indicate the cause of the occurrence. The cylinder does not work - this is already obvious. Before you go to a car service, check the spark plugs and wires. They are most often guilty of the fact that the engine troit.

When various failures begin to appear in the operation of the engine, accompanied by uncharacteristic sounds, it does not immediately become clear where the strange noise came from and what it means. The engine is troit - this is the diagnosis that experts from the auto repair shop can make. To successfully get rid of tripping sounds, you need to follow the instructions.

general information

The internal combustion engine is a complex system that requires regular maintenance and repair. In the absence of such procedures increases the risk of failures and malfunctions in the operation of the unit:

There are a lot of reasons for such malfunctions, but tripling is one of the most common. The defect occurs in almost all types of power plants (diesel, gasoline), for any mileage, condition and other operating properties of the internal combustion engine.

And if the engine troit, but the driver does not take appropriate measures, this leads to irreversible consequences in the form of failure of the unit. To avoid this, it is important to eliminate the source of the problem in a timely manner.

In order for the engine to work properly, and the combustion of the fuel-air mixture to occur correctly, it is important to maintain its tightness. If leaks and damage to the CPG and timing appear, the gas distribution mechanism will begin to fail, which will increase the risk of complete depressurization. Loss of tightness occurs when the occurrence or deformation of the piston rings, piston, cylinders and other important components of the system. It also leads to the appearance of cracks or burnout of the timing valves.

To determine the malfunction, it is important to measure the compression in the cylinders. If the level has dropped in only one cylinder, then it is enough to pour a little engine oil into it with a syringe. After performing such a manipulation, you need to re-measure.

Main reasons

To fix the problem, you need to figure out why the engine is troiting. The reasons are often associated with a violation of the combustion process of the fuel-air mixture in the cylinders, which causes severe vibration. But the occurrence of vibrations is not always associated with tripping, because there may be other factors contributing to such symptoms. The reasons why the engine starts to triple include:

Lack or excess of the fuel mixture that is supplied to the cylinder.
Too little or too much air.
Failures causing early or late ignition.
Damage, wear and other engine failures, accompanied by a loss of compression.

In most cases, tripping occurs when using the wrong fuel composition, untimely ignition, or the inability to ignite. This is also facilitated by incorrect combustion conditions due to mechanical damage or other malfunctions of the internal combustion engine.

Given these data, it is possible to significantly narrow the scope of the search and the number of devices for diagnosing. It is mandatory to check the fuel system and the injector, after which the intake air supply is assessed. In some cases, engine tripping occurs when one of the ECM sensors is damaged.

One of common problems causing tripling is late or early ignition. Also, the motor can triple with a weak spark of a candle, which is easy to fix on your own. First of all, you need to unscrew the candles and inspect them in detail. If there is damage to the insulator or other visual defects, you will have to replace the candle.

If the insulator is damaged, it will be visible to the naked eye, because the place of failure will be covered with a black coating. In addition, it is necessary to assess the condition of the central electrode and carefully examine the gap of the side element.

The next step is to check the spark plug wires. If episodic friction is noticed when driving in the rain or at high humidity, this unit may stop working normally. The power plant will need to be warmed up and put into normal operation.

You need to start work with a visual inspection of the spark plug cap and wires with maximum voltage. Such components are covered with an insulating layer, which dries out over time and begins to crack. As a result, this leads to current leakage.

High-voltage wires are subject to malfunctions during frequent repair or service activities under the hood. It is almost impossible to determine the defect visually, so you will have to contact a specialist for help.

If the candles and wires are fully functional, the ignition coil may be the cause of tripling. And if there are separately placed nodes in the engine, the phenomenon will spread to each candle. To check the coil, it is enough to unscrew the candle, attach it to the ground and start the engine. It is important to make sure that the thread of the candle fits snugly against the mass, and that the cap is securely fixed to the candle. If you do not follow the rules, the coil may burn out, and the switch may fail.

When a good spark appears with a bang, you will have to look for another reason for tripping. If there is no spark, the coil needs to be replaced. The electronic ignition distributor or switch is very rarely subject to breakdowns, so it is practically not necessary to replace it.

Incorrect air intake at the intake also leads to intense engine trebling. In this case, the risk of depressurization increases, due to which the power plant will suck in excess air, reducing overall power and stability.

To check the air system, you need to block the intake pipe near the air filter and start pumping air to provide the desired pressure (usually 0.5 atmospheres). Then you should start looking for the leak. If there is no pressure drop, then the system is fully operational. If there are hissing sounds in any place, the assembly will most likely need to be repaired.

As for the lack of supply air, then it is often caused by dirty filters, due to which it lost its bandwidth. They fix the problem very simply: first of all, you need to remove the filter, and then check how the engine works without it. In addition, the problem appears when clogging throttle valve. Such an element needs careful diagnostics and verification, so they must be performed at each scheduled inspection, along with the replacement of oil, filters and other working elements.

Often, a damaged TPS, DMRV or other sensor that sends the wrong signal to the engine leads to engine tripping. the electronic unit management. As a result, the last node cannot determine how open the damper is and how much air mass has entered the motor. As a result, the rest of the components power plant are not able to correctly calculate the composition of the fuel-air mixture, which entails additional problems.

To make sure that the sensors are malfunctioning, it is necessary to check the operating mode of the scanner installed in the diagnostic socket, and then compare the obtained data with the nominal ones. Any deviations from the norm lead to the beginning of engine tripping.

Damage to the power system

If the engine started to triple, perhaps damage to the power system led to this. Checking it for faults it is important to familiarize yourself with the working properties:

fuel pressure;
suction intensity.

The first indicator is related to the functionality of the electric fuel pump, which is installed in fuel tank majority modern cars. If the mesh filter becomes clogged with all sorts of debris, this causes malfunctions in the electric motor of the fuel pump or impairs the power supply to the device.

At the inspection stage, it is also necessary to evaluate the condition of the regulator valve in fuel rail. If the pressure is too low, tripping is inevitable.

After checking the previous nodes, you need to evaluate the condition of the injection nozzles. As you use vehicle they become clogged, reducing throughput and causing other failures. In addition, the nozzles can completely fail. To clean and check them, it is necessary to use a washing stand that pumps special composition for cleaning, as well as supplying power. The system simulates the operation of a working injector and evaluates the performance.

If the nozzle is not damaged, then in the closed state it should not leak. Besides injection system should open in time during the supply of an electrical impulse.

In the absence of problems with fuel pressure and injector operation, it remains to assess the condition of the computer. And although such an element very fails in rare cases, it is possible. The cause of the trouble is the replacement of the factory firmware or software chip tuning.

If the fuel card is flashed incorrectly, this will lead to such a nuisance that the electronic control unit will begin to pour fuel. Also inevitable problems in the form of flooding spark plugs.

If the engine compression readings have dropped significantly, this may be due to its wear. Often one or a pair of cylinders fails, as a result of which the compression of the fuel-air mixture occurs incorrectly. Because of this, normal combustion of fuel does not occur, and compression drops due to burnout of pistons and valves, wear of piston rings and other problems.

To fix the problem, you need to evaluate the compression in the motor, and then disassemble the unit for detailed diagnostics and repair. In any case, the motorist must understand that starting the engine with bad cylinder Absolutely forbidden. If you ignore this rule, additional failures and problems are simply inevitable. The final repair of the system will require large financial costs and efforts.

The list of causes of engine tripping is very extensive. But in order to understand why the car is troiting and how to deal with it, it is important to separately consider the type of power plant (injector or carburetor), the specifics of the timing, the general condition of the engine, and others. If we are talking about problems with the carburetor engine, then it is possible that the problem can be eliminated by simply cleaning and tuning the carburetor.

For injection-type models, additional diagnostics, sensor restoration, nozzle cleaning and other service activities will be required. If problems with the internal combustion engine itself led to engine tripping, you will have to prepare for the mandatory disassembly of the engine for thorough diagnostics and repair.

In any case, if the engine starts to triple, this is a serious signal that diagnostics need to be performed. In this case, it is important to quickly determine the presence of a problem, as well as to choose effective method its elimination.

Engine troit (engine tripping) - a definition that should be understood as a malfunction when one or more cylinders do not work partially or completely. In other words, the process of combustion of the fuel-air mixture in individual cylinders is disrupted, which causes unstable job motor at idle, under load and in transient conditions.

Read in this article

Why does the motor start to thrive

In the list of the main malfunctions, as a result of which the engine troit, the following are noted:

supply of insufficient or excess amount of fuel to the cylinder;
supply of insufficient or excess air;
malfunctions of the ignition system,;
wear or breakdown of the motor, which is accompanied by a decrease in compression;

In other words, the engine starts to triple as a result of an inappropriate composition of the fuel-air mixture, untimely ignition of the mixture or the inability to ignite the charge, as well as violations of the conditions for normal combustion of the mixture as a result of mechanical wear or breakdowns of the engine itself.

Based on these data, it is possible to narrow the scope of the search and the number of systems for diagnosis. The check should start with and the injector, then the air supply is checked and. In some cases, engine tripping may also be the result of a failure of one of the sensors.

Troit engine: ignition of the fuel-air mixture is broken

Most common cause, which causes the engine to triple, is late or early ignition, as well as a weak spark of the spark plug. At the initial stage, unscrew the spark plugs for a detailed inspection. If damage to the insulator or other defects is noticeable, then the candle should be replaced.

Determination of a malfunction of the power unit

Troya motors can bring a lot of problems to motorists. Therefore, amateurs and professionals are obliged to identify these problems in the early stages. By and large, the reasons for such work can be caused by malfunctions of some components or assemblies. But before diagnosing, you need to figure out how to understand that the engine is troit.

If you carefully understand the principle of operation of the motor, then tripling means that one or more cylinders simply do not work, that is, they do not perform their functions. That's what it means to troit the engine.

The main signs are as follows:

engine running at idle, this problem is clarified in the garage, for this the motorist needs to start his car and listen carefully to the operation of his motor, as you can hear incorrect operation, strong vibrations, as well as a characteristic knock (for diesel power units);
engine running hot, such diagnostics must be carried out while the car is moving, for this purpose, the motorist should carefully listen to the operation of the motor if the car twitches when hard pressing gas pedal, power is lost, goes high flow gasoline, then one or more cylinders simply do not work;
engine running cold, some motorists may think that a “cold” diagnosis is no different from an idle check, but this is not so, a troubling engine does not start well, or may not start at all, also when trying to start it, the motorist may feel a strong vibration or feel knock in the engine.

Based on the above signs, motorists should understand that if their cars begin to lose power, strong vibration occurs, power units consume a large amount of fuel, although according to technical documents, they should consume less, there is such a problem as the failure of one or more cylinders.

There are several ways out of this situation. The first is that it is possible to self-diagnosis, and determine the cause of failure in the operation of one or more cylinders. The second is a trip to a specialized service station, where a complete computer diagnostics power unit.

It is important to remember that one of the causes of motor tripping is bad compression in one or more cylinders. It can be checked with a special device, but before that, you need to carefully read technical specifications power unit, and find out what compression rate in the cylinders must be present for the normal operation of the engine.

Reasons why the engine will triple

Modern cars equipped with gasoline and diesel types of power units, which may have their own reasons for cylinder failure.

At the same time, it must be remembered that gasoline engines divided into carburetor and injection. This significant difference will also make some adjustments when diagnosing the causes of a malfunction.

Trouble of a gasoline carburetor engine

Gasoline carburetor engines differ from injection engines in that they have little electronics that is responsible for the operation of the power unit and the supply of fuel to the combustion chamber. Therefore, diagnostics can be carried out by improvised means.

If the engine is troit to a cold one, when idling, or during the operation of the car, experts recommend conducting such diagnostics.

Start the motor. You need to put the car in the garage, then start it, listen to the engine, and start turning off the cylinders one by one, after warming up, by disconnecting the candles from the power electrical wires. If disconnecting, for example, 2 cylinders, worsens the operation of the engine, then this cylinder is working properly. When the idle cylinder is disconnected from the spark, the operation of the engine will not change. This means that the problem is in this cylinder.
Checking the spark plug. After identifying a non-working cylinder, it is recommended to unscrew the spark plug and carefully inspect it. If its tip (electrodes) are wet, then the fuel mixture does not ignite, so there may be no spark. In this case, it must be replaced and the operation of the motor checked. If the piston has started working, then the problem has been identified and solved. In the absence of fuel on the electrodes (dry tip), it means that the fuel does not ignite completely. The problem may be the poor quality of the fuel mixture (lack of air, large distance between the spark plug electrodes). If after replacing the spark plug the problem persists, then the problem is in the carburetor.
Checking power wires. If replacing the spark plugs did not resolve the problem, then these causes may be power electrical wires that supply a spark. They need to be inspected for oxidation, winding cracks, and current leakage. It is better to start the car in a dark room, then carefully look at the wires, and if sparks are visible, then the problem is in them. It is also recommended to clean all oxidized contacts. If after that the engine still troit, then you need to look for another reason.
Checking spark distribution. Here you need to carefully examine the slider, as well as other parts of the mechanism that distributes the spark through the wires. It is possible to oxidize the contacts, burn out the slider, as well as other elements of the distributor or ignition coil. It is better to change them to new ones, after which set the ignition timing and check the operation of the power unit.
Compression test. Sometimes the cause of tripling can be a lack of compression in the cylinder. There are several reasons for this, the rings are worn out, or the cylinder is deformed (as a result of friction). If this is the problem, then you will have to change the piston and cylinder.

Trouble injection gasoline engine

The injector is characterized by the fact that all processes in it are controlled by electronics. You can learn about what the injector itself is from other publications. But in this case, it is necessary to understand the reasons for the tripling of such power units, they are as follows:

on-board computer failure, as mentioned above, in such motors, all processes are monitored and controlled by their electronics, therefore, in the event of a software failure, the fuel mixture will not enter the problem cylinder in full, or there will simply be no spark, therefore, if this problem is detected, you just need to flash the system;
malfunction of the electronic spark distribution mechanism, this is a common problem, for example, in some models of cars of the VAZ, Priora family, and is characterized by the fact that over time the ignition timing gets off, which leads to engine tripping, on-board computer in this case, it will show errors, deciphering which it will be possible to fix the problem;
broken fuel lines, or fuel distribution systems, domestic cars, which have 16 valves in the engine, are often prone to such breakdowns, their fuel system can fail due to disruption of the fuel supply or damage to the hoses through which it is supplied, so the motorist must unscrew the hoses and nozzles and check them while running engine, for the receipt (injection) of fuel and its volume;
spark plug failure, the injector can also work poorly in the event of failure of the spark plugs, in general for gasoline power units, spark plugs play one of the most important roles, since it is they who ignite the fuel mixture, and if they fail, then the cylinders will not work, so eliminating such The problem is the complete replacement of broken candles with new ones.

It is important to remember that poor compression can also be added to this problem, due to wear on the piston rings or cylinder walls. Therefore, if everything works well, and the motor troit, then it's time to change the pistons, rings on them or cylinders.

Trouble diesel engine

In diesel power units, main problem triples are nozzles, or the fuel system itself, consisting of a high-pressure pump, as well as a fuel supply system.

First of all, the motorist must identify the cylinder that is not working by disconnecting the fuel hoses and injectors in series. After identifying a broken piston, you first need to check the fuel supply. To do this, the engine must be started, and then look at the fuel stream. If it dissipates, then the problem is piston rings or deformation of the cylinder.

If the jet does not dissipate, then the problem is in the nozzle, its tip is simply damaged, which does not allow fuel to enter the combustion chamber in the form of a scattered cloud. But if everything is in order with the injectors, then the problem is fuel pump, or there is a leak of fuel in the tube through which it is supplied to the cylinder.

You need to know that the diagnosis diesel engines it is better to entrust it to specialists, since in practice there were situations when motorists did not connect the fuel supply pipes correctly (changed their places), or made other errors that the diesel does not like.
The tripling of the power unit indicates that one or more cylinders do not work in it, that is, the necessary load does not go to the piston. The solution to this problem is to diagnose the problem, as well as fix it.

"One of the cylinders does not work" - this phenomenon means that the "engine is troit". In this article, we will explore the reasons if the engine started to troit and what to do.

Why did the engine start shaking?

If the engine starts to triple and one of the cylinders does not work, we will hear clearly distinguishable and uniform "boo-boo-boo ...". When this happens, it causes additional problems because the engine begins to wear out quickly.

Because of this, it decreases engine compression, are created good conditions to create scoring on the cylinder mirror, on the pistons. The engine starts in another temperature regime, starts to overheat, because the oil also serves to remove heat from moving parts, and what is already in the crankcase can hardly be called engine oil.

At first glance, the definition of this malfunction is simple. But sometimes it turns out that it has been checked, everything seems to be working fine, but the engine is still "troiting". Therefore, points we will try to analyze the procedure for diagnosing in an ordinary garage , where there are no special instruments to look inside the engine and accurately determine the reason why the engine began to triple.

Blame the spark plugs?

First, unscrew the candle from the cylinder and carefully examine it. What will we see? If the engine is running normally and correctly, the color of the ground electrode and insulator will be light and slightly brown. Such a candle should work. If we see black soot on the electrode and insulator of the candle, this is the reason why the engine may start to triple. Enrichment with fuel or filling with oil is in progress.

Carbon deposits may cause the spark plug to fail or operate irregularly because it interferes with normal sparking. The causes of soot can be:

prolonged operation of the engine at idle and in warm-up mode,

low compression in the cylinder,

displacement or violation of the valve timing,

incorrect operation of the injector (nozzles),

malfunction of the oxygen sensor.

Next, let's look at the spark plug housing. It should be white and should not have vertical black stripes or black dots. The presence of this says that the candle is already breaking through and will not work normally.

If the visual inspection satisfied us, then check directly the spark itself when scrolling with the starter. We insert the spark plug into the tip of the high-voltage wire, put it on the engine ground and scroll the engine with the starter and see if a spark jumps between the spark plug electrodes or not. If a good spark of saturated blue color jumps between the candle and the mass, everything is fine.

If the spark plug does not jump or jumps, but is barely noticeable - this is the main reason why the engine began to troit.

Inspection of high voltage ignition wires

If everything is fine with the spark plugs, then carefully consider each high-voltage wire separately . First, let's examine the tip of the wire inserted into the spark plug. It should be solid and not have plaque on the inner surface and dots on the outside.

Both the first and second indicate that this high-voltage wire worked in extreme mode (faulty spark plug, increased gap in the spark plug), which was the reason. If you do not pay attention to this color change inside the tip of the high-voltage wire in time, then the wire will simply break through.

To determine the state of "high-voltage" we measure the resistance using a digital multimeter. Values may be different on a specific motor, but should not exceed 20 kOhm. If one of the wires showed a resistance value significantly less than all the others, so it is faulty and it lies the cause of interruptions in the operation of the motor.

It happens that mixed high voltage wires when one of the cylinders does not work because of this. This happens because although there are numbers on the ignition coils indicating the number of the cylinder on which this ignition coil works, not everyone knows about it or is poorly read due to dirt. On machines, the cylinder numbers are written on the ignition distributor, you just need to thoroughly clean the covers from dirt and everything will immediately become visible.

Injector or injector malfunction

The engine may triple due to an injector or a malfunction of the injectors in the following cases:

Malfunctions of the injector itself (rarely encountered),

Due to the use of low-quality fuel or the improper use of "fuel system cleaners",

The nozzles are clogged and need to be cleaned,

Broken or shorted power or control circuits to this injector.

If it was not possible to find the cause, you should use the engine diagnostics. If one of the sensors does not work, an error will appear. If it is not, then the reason is in the mechanical part.

Also, one of the reasons why the engine began to "trouble" - maybe poor ground connection to the body auto. There was a case when the mass attachment moved away from the vibrations and it turned out that the engine began to work intermittently, because. there was no reliable contact. After pulling all the connections, the motor worked without interruption.