Why does the engine not develop injector speed? The engine does not develop speed - where to look for the problem and how to solve it? Violation of ignition timing angles

07.10.2021

Reducing the engine speed significantly affects its power and traction qualities. If suddenly your car has lost its former agility, you should think about diagnosing it, because such symptoms do not bode well.

In this article we will talk about why the engine does not develop speed and what this may be due to. We will also look at probable reasons loss of power by the power unit and methods for eliminating them.

Symptoms of a problem

It is not difficult to determine that the engine does not develop the speed it should develop, especially if you have driven the car before and know its original characteristics. Those drivers who have encountered a similar problem in their practice know that a decrease in power is characterized by sluggish acceleration, loss of dynamics, traction, as well as engine overheating and increased fuel consumption. Sometimes these processes are accompanied by bluish or even black exhaust.

Do you press the accelerator pedal and the engine revs poorly? Pay attention to the tachometer. A working engine should immediately respond to an increase in the amount of fuel supplied to the combustion chambers by increasing the number of rotations crankshaft. And if this does not happen, you need to urgently look for the problem.

Main reasons

There can be many reasons why the engine does not develop speed. Here is a list of the most common ones:

the power unit is not warmed up to operating temperature;
low or, conversely, excessive fuel level in float chamber;
accelerator pump is faulty;
clogging of jets and carburetor channels;
air leak in the intake manifold;
the ignition timing is incorrectly set;
the valve timing is disrupted;
spark plug gaps are broken;
clogged air or fuel filter;
malfunction of the mass air flow, crankshaft position, position sensors throttle valve, detonation;
insufficient compression in the cylinders, etc.

As you can see, the list is quite extensive, although it cannot be called complete. Let's look at the listed faults in more detail.

Cold engine

It would be wrong to demand from power unit full power until its temperature reaches the operating temperature (90 0 C), especially if we are talking about an engine with carburetor injection. Cold engine does not develop full speed, even with the choke completely closed. Fuel mixture must be warmed up before entering the combustion chambers. Otherwise, the car will “twitch” and the engine will stall and detonate. So, if your car is equipped with a carburetor engine, do not rush to drive it until it warms up.

Fuel level in the float chamber

The fuel level in the float chamber can also affect the operation of the power unit. If it is lower than required, the concentration of gasoline in the combustible mixture decreases. Because of this, the engine does not develop power. When the level is too high, the mixture, on the contrary, is too rich, but more than normal enters the combustion chambers. Before it enters the cylinders, it does not have time to warm up in the intake manifold, which leads to detonation and loss of speed.

The fuel level is adjusted by bending (bending) the float mounts.

Acceleration pump, carburetor channels and jets

Continuing the topic of loss of power in a carburetor engine, we cannot fail to mention the accelerator pump. The response of the power unit to pressing the accelerator pedal depends on its serviceability. Most often, the problem lies in the fuel supply, and the “nozzles” of the sprayer are to blame for this, through which gasoline is supplied in a thin stream. To check the functionality of the carburetor accelerator pump, you will need to remove the air filter to expose the first chamber. Next you need to open it and hold it for a few seconds. In this case, a thin (about 1 mm) stream of fuel should escape from the “spout” of the accelerator, directed precisely into the second chamber. If the jet is low-power or crooked, this is a sign of clogging of the sprayer, jets, and accelerator pump valves. This problem can be solved by cleaning them.

Air leak in the intake manifold

Another reason why the engine does not develop speed may be a banal air leak in the intake manifold of the power unit. Symptoms of such a malfunction are difficulty starting the engine, its “triplication”, problems with increased fuel consumption and, of course, loss of speed. This all happens due to a sharp depletion of the mixture due to unaccounted air entering the combustion chambers.

Most often, system depressurization occurs due to wear of the gasket intake manifold. Determine what injection engine does not develop speed precisely because of air leaks, it is quite difficult, just as it is not easy to find the place of depressurization itself. It is better to entrust this to specialists. But there are some things you can try to do yourself. You can, for example, take a syringe with a needle, fill it with gasoline (or solarium for diesel units) and treat the perimeter of the junction of the manifold with the engine with fuel. If the gasket between them has become unusable, then gasoline will be sucked into the combustion chambers along with the air. If, after starting the engine, you notice positive changes in its operation, you can be sure that the reason lies precisely in the suction.

Incorrect ignition timing

It often happens that unlucky car owners, wondering why the engine does not develop speed, forget about the ignition timing, although it plays a vital role in the operation of the power unit. The timely ignition of the fuel mixture in the combustion chambers depends on it. If the ignition timing is set incorrectly, you will never achieve coordinated operation of all engine systems and mechanisms by any means or methods.

In injection power units, the corresponding sensors are responsible for the correct torque. Their job is to collect information and transmit it to the electronic unit control, which in turn adjusts the angle. IN carburetor engines There are no such sensors, so the ignition is set manually by scrolling the upper part of the ignition distributor.

Setting the correct angle yourself and without special equipment is not easy, although it is possible. At service stations, a special strobe is used for this, with the help of which a specialist determines the position of the mark on crankshaft at a certain position of the distributor.

Violation of valve timing

Violation of valve timing usually occurs when the timing belt breaks or when it is replaced. If you make a mistake in the form of a displacement of at least one “tooth” between the gears of the crankshaft and gas distribution mechanism, you will get real problem as unstable work engine, increased fuel consumption, colored exhaust and other troubles.

To avoid getting into a similar situation, work on and repair of all elements associated with it should be carried out at service stations. Well, if this is not possible, then it is necessary to carefully check and double-check the correspondence of the marks on the timing gears, crankshaft and flywheel.

Gaps between electrodes

The next reason why the engine develops speed slowly or does not develop it at all may be an incorrect normal car with a normally running engine, but you didn’t like something and decided to change the spark plugs, but didn’t read the manufacturer’s recommendations. An error in the gap of one tenth or one hundredth of a millimeter will certainly make negative adjustments to the operation of the engine. Depending on its increase or decrease, this may result in difficult starting, loss of traction, decreased power, excessive fuel consumption, etc.

When it comes to clearances, we cannot fail to mention two-stroke engines. For them, candles are one of the most important elements providing stable work motor. So, if it does not develop speed, the first thing you should do is check the condition of the electrodes and whether the gap corresponds to the recommended values.

Clogged air and fuel filters

Is it worth it once again say that filters need to be changed every 7-10 thousand kilometers, and in special operating conditions twice as often. Contamination of these elements causes difficulty in supplying fuel or air to the manifold and leads to disruption of normal engine operation. The lack of normal fuel pressure in the fuel line causes the combustible mixture to become lean, and if problems arise with the air supply, it becomes over-rich. In both the first and second cases, the engine “chokes”, overheats, loses power and speed, and consumes more fuel.

This type of malfunction can be eliminated by replacing the filter elements.

Sensor malfunction

Compared to a carburetor engine, an injection engine benefits from the fact that its operation is controlled electronically, and if any problems arise, the driver will learn about them by an error signal on the control panel. All he has to do is connect the tester and read the code to determine which node has failed. This happens thanks to electronic sensors that control the operation of basic systems and mechanisms. But they don’t last forever either.

If any of them refuses to work, the engine goes into emergency mode. Due to the fact that the electronic unit stops receiving necessary information, the operation of the power unit becomes unstable.

Insufficient compression

And finally, the most unpleasant malfunction, which leads to a decrease in engine speed and loss of engine power, is insufficient compression. It is a consequence of wear and tear of parts piston group or sticking (coking) of piston rings. As a result, the pressure in the combustion chambers decreases, and part of the energy from the combustion of the combustible mixture is simply lost.

Compression is measured using a compression meter. Its normal values, depending on the type of engine, can vary from 10 to 14 kg/cm2. Having discovered such a problem, you should think about a major overhaul of the engine.

5 minutes to read. Views 607 Published November 23, 2015

In this article we will talk about the main reasons why the engine does not develop full power.

Any car engine Loses power over time. However, there are times when the engine internal combustion for no particular reason, it suddenly loses power by more than 15 percent. In such cases, it is necessary to diagnose the car engine and look for the cause of the sudden loss of power. If the power loss is more than 15 percent, the car will have difficulty accelerating even on a flat, dry road surface. There are many reasons for a sudden loss of engine power. In this article we will talk about the main reasons why the engine does not develop full power.

The table below shows the main reasons for loss of power in a car engine.

Cause	Description
Early ignition.	An internal combustion engine may suddenly lose power due to more early ignition. As a result, the fuel mixture will ignite prematurely, and exhaust gases will go against the normal movement of the pistons. Accordingly, the engine crankshaft will slow down and the engine will not operate at full power.
Late ignition.	In case of delayed ignition, the fuel mixture simply will not have time to burn before the piston passes dead center. As a result, the energy obtained from combustion will not be directed in the right direction, and the engine will not use it to its full potential.
Failure of the vacuum ignition timing regulator.	Incorrect throttle opening has the greatest impact on engine speed. If the diaphragm is faulty, the vacuum regulator will work with great difficulty. This will cause the car engine to lose power.
Damage to the centrifugal ignition timing regulator.	Engine power can also drop sharply due to a malfunction of the centrifugal ignition timing regulator. When the engine picks up speed, the centrifugal regulator will begin to increase the ignition timing, while the weights will begin to jam, and the angle will not change throughout the entire operation of the engine. This will cause a loss of engine power. Due to the same problem, a sharp overconsumption of fuel will begin, since the ignition will be earlier. All this happens due to the rapid stretching of the spring weights of the centrifugal ignition timing regulator.
Loose seating of valves.	If the valves are not seated tightly in their intended seats, the engine will not operate properly and engine power will decrease. For each individual engine model, the gap between the end of the rod and the pusher adjusting washer must have a certain size. If the gap size increases, the tightness of the combustion chamber will be compromised. Because of this, engine power will sharply decrease. If the gap size is reduced, then the seat and valve edge will begin to burn. Valve leaks are determined by shots. In the case when the shot goes into the carburetor, this means a loose fit of the intake valve. If the shot goes into the muffler, then this means the exhaust valve is loose.
Worn piston rings.	A sharp decrease in engine power can occur due to worn piston rings. In this situation, the compression in the cylinders will sharply decrease, and this will dramatically affect the power of the engine itself. It is quite easy to detect worn piston rings. We need to remove the crankcase ventilation hose from the breather. If smoke comes out, we will understand that the rings are worn out. In this case, the smoke should resemble a pulsating dark stream.

If the ignition of the car engine is adjusted correctly, the ignition timing regulator is working properly, then it is necessary to look for the reason for the sharp decrease in engine power elsewhere. Experts recommend paying attention to the filling of the cylinder with the working mixture. The cause of this problem may be a sticking throttle valve. That is why motorists recommend paying attention to the throttle valve drive more often. Next, you need to check the air filter and, if necessary, replace it with a new one. The main reasons for the lack of working mixture in the cylinders are the following:

— Large deposits of tar and coke in the intake pipe;

— Too much carbon deposits in the engine cylinders;

— Jamming of the needle valve in the float chamber;

— The use of gasoline with an octane number that is not suitable for this model engine.

Experts recommend paying attention to the filling of the cylinder with the working mixture. The cause of this problem may be a sticking throttle valve.

Another reason for a sharp decrease in car engine power is the entry of a lean working mixture into the engine cylinders. If a lean working mixture enters the cylinders, then the reasons may be the following:

Air leak. In the places where the injector and carburetor elements are connected, air leaks may occur if the gaskets are damaged or due to loose fastenings. Detection of such gaps is carried out by applying soap foam. Air leakage can be removed by tightening the bolts or by replacing the sealing gaskets.
Freezing of liquid. The cause of a poor working mixture in the cylinders may be freezing of the liquid in the power system. This clogs the channels and jets in the carburetor. In this situation, the malfunction can be eliminated by purging the nozzles, channels and pipelines.
Clogged air hole in fuel pump. If the air hole in the fuel pump becomes stuck, a lean mixture will form in the engine cylinders. This problem can be corrected by replacing components fuel pump and cleaning the air damper.
Diaphragm breakthrough. When the diaphragm breaks and the valves stick, a lean working mixture occurs in the fuel pump. This problem can be fixed.

Every car owner is familiar with the capabilities and everyday behavior own car while driving, so when something goes wrong with the car, problems are diagnosed literally from the first kilometers of the appearance of the problem. The drop in engine power is especially striking, which is characterized by the inability to gain high speed and sufficient traction. Imagine - you press the accelerator pedal all the way, but the engine simply ignores your actions and for some reason does not develop the required power, and this behavior can occur even when driving on a straight road. It is also possible that the engine picks up speed up to a certain point, and then there is a feeling that something is holding it back and not allowing it to spin up further. The situation is quite unpleasant, but not critical, but it requires timely intervention from a specialist.

How to check engine power indicators

To check the power of the power unit the car owner can install on the car special equipment, which will monitor power indicators in real time, however, the cost of such equipment is unreasonably high, and its use is only advisable for sports cars, the operation of the engine of which requires constant monitoring.

You can measure the power of a vehicle even more in a budget way, which requires a laptop, special software and a cable to connect to the vehicle’s on-board system. After connecting the computer, you need to drive the car a little, developing different speeds, after which the program will automatically calculate the rated engine power.

It is important to note that this method has significant errors, but allows you to get a general idea of the power indicators of the car.

The most accurate method for determining the power of a power unit is to place the car on special equipment - a dynamometer, which can be found in almost any professional car service center.

Measuring performance of the Nissan GT-R with SuperSprint on the stand (video)

The main reasons for the decrease in throttle response

Regardless of type power plant, experts usually distinguish the following reasons for a decrease in vehicle power:

Use of low quality fuel. If a loss of power was noticed after visiting a gas station, then the cause of the drop is most likely due to the use of low-quality fuel. The only solution in this case is complete replacement fuel, and if this is not done, there is a high probability of damage to the power unit.
Presence of dirt in the air filter. In this case, the fuel is supplied without the required amount of air, which reduces the efficiency of fuel combustion and causes a drop in the power of the power plant. To solve the problem, you just need to replace the failed filter, and you can do this yourself.
Using low-quality or long-used spark plugs. Dirt in the electrodes of the spark plugs, increased wear or changes in the gap can cause a decrease in the combustion efficiency of the fuel mixture and, accordingly, lead to a drop in the power of the power unit. The solution to the problem may be to replace the spark plugs or identify the causes of their contamination (if the spark plugs have been replaced recently).
Presence of dirt in the fuel filter. Filled with dirt fuel filter interferes with the normal flow of fuel into the combustion system, which affects engine performance. To solve the problem, simply replace the fuel filter with a new one.
Mechanical damage to the engine. A decrease in engine output may be due to a drop in compression, excessive wear piston rings, increasing gaps in valves and the like. Extraneous noise in the power unit is the first sign of such problems. In this case, it will not be possible to resolve the issue without the involvement of experts.
Catalyst contamination is another of the most common reasons for reduced power of a power plant. To fix the problem, it will need to be replaced, which can lead to significant financial losses.

Removing the catalyst is a modern bone of contention for many car enthusiasts. Heated debates about the need and advisability of driving without this element are still ongoing.

Differences in different types of engines, the difference between gasoline and diesel

Reasons for the drop in power on gasoline and diesel engines They are almost completely identical and differ only in the type of engine installed - injection or carburetor.

Does not develop on injection

The drop in injector power can be associated with the following reasons:

Contaminated fuel or air filters;
Contamination of the fuel pump filter mesh;
Incorrect operation of the vehicle ECU;
Accumulation of dirt in the nozzles;
Malfunctions of the fuel pressure regulator, main sensors whose operation is related to the engine and breakdowns of the lambda probe.

Carburetor power has dropped

Inadequate opening of carburetor valves;
Accumulation of dirt in the carburetor and clogged fuel pump fittings;
Pressure drop or malfunction in the needle valve;
Malfunctions in the operation of the float element;
Reducing the throughput capabilities of the nozzle;
There is a malfunction in the economizer valve.

Simple ways to increase engine power

There are several simple ways, allowing you to increase engine power in case of weakening:

Use fuel with a higher octane number and refuse gas stations with poor quality fuel. However, in this case, it must be remembered that increasing power significantly reduces the service life of parts that are subject to more noticeable wear.
Replacing the standard air filter to a filter with “zero” resistance, which will increase the degree of fuel compression in the cylinders and accordingly increase engine power.
Equipping the car with “direct flow”, which will save power that is lost during the emission of exhaust gases.
Reduced friction force, which can be achieved by using better quality motor oil or by installing a remetallizant.

More complex and expensive methods of increasing engine power include chip tuning, installation of a turbine, and replacement of individual engine parts.

Not a single car owner is insured against a drop in engine power, but timely service maintenance vehicle can significantly reduce the likelihood of this problem occurring. But if it does appear, then the most correct solution would be to contact a specialized service station, where they can quickly identify and eliminate the causes of the drop in power, as well as carry out a comprehensive diagnosis of the operation of all systems and components of the vehicle.

Every driver wants his car to function properly. But any equipment often breaks down, the same applies to vehicles. One of the most common problems is the inability to develop optimal speed of the internal combustion engine. It is not at all necessary that the cause of the malfunction will be the motor. As practice shows, there are quite a lot of options. As well as treatment methods similar problem with your own hands.

1 What are the symptoms of a problem?

Experienced drivers are well aware of the capabilities of their “ iron horse“and perfectly feel any uncharacteristic feature of it. The lack of engine speed is quite easy to determine. When you press the accelerator pedal, the engine does not develop speed, which is accompanied by poor acceleration, deterioration in dynamics and increased engine heating temperature.

The consequence of prolonged pressing on the gas pedal without any kickback from the engine is excessive fuel consumption. The car smokes a lot and exhaust system at the same time, it spews out clouds of black or gray gases.

During normal operation, the internal combustion engine instantly responds to any action associated with the gas pedal, be it additional force or a decrease in pressure on the accelerator. If there is no return answer, it is necessary to look for the cause of such a problem. According to experts, there are many reasons why the engine does not gain power, starting with the engine itself and ending with the fuel system.

2 Insufficient heating of components when turning on the engine

To determine the source of the problem, you should carefully and step by step check the main functional systems of the car. In some situations, very serious and expensive repairs are required using professional equipment at stations Maintenance. But the reason may lie elsewhere. Thus, an insufficiently warmed-up motor is not able to operate optimally, therefore, when turning it on, especially in the cold season, it is necessary to allow it to run for several minutes. idle speed.

Some drivers claim that traffic is low speed without rapid acceleration, it allows you to better warm up all the main parts of the engine, but this is a big misconception. Without warming up, the car jerks, moves jerkily and emits characteristic sounds. If possible, then preference should be given to warming up the car in static conditions.

But if even after the required period of time the engine has not warmed up to the optimal temperature, then the problem may lie in the cooling system. Very often the thermostat fails, this is more true for operation during winter frosts.

3 How clogged filters affect engine performance

There are many filters used in vehicles, but air and fuel play a key role. If these consumables are not able to fully perform their direct duties, then the result is a decrease in the number of revolutions, so the engine does not pull at full power.

The job of the air filter is to remove dirt and excess substances while creating the air-fuel mixture. This element is constantly in use, so it gets clogged very quickly. The pores become clogged with tiny particles of dirt and dust, and the air supply decreases, which has an extremely negative effect on the engine speed.

There are three main types of air filters:

Panel.
Cylindrical.
Frameless.

Today, frameless filters are used, which are characterized by a long service life, the strength of the material used and low prices. When purchasing a filter, you need to pay attention to the replacement period for this element. Typically, the service life is about 20,000 kilometers, but operating a vehicle in polluted and dusty cities requires installing a new filter after 10 thousand kilometers.

When the engine spins poorly, replacing the filter should help. The procedure is not difficult, because you just need to lift the hood cover and unscrew the required element. It is attached to the base with four bolts, so finding it is not difficult. Having removed the old consumable, it is recommended to thoroughly clean its location, removing all dirt, dust, insects or fluff. After wiping the surface with a damp cloth, all that remains is to install new filter sealing element and carefully tighten the bolts.

Excessive oil consumption is another reason for reduced engine power. Exhaust gas vapors penetrate through the valve seals, which leads to a deterioration in the operating conditions of the unit. On piston rings A layer of soot forms on the electrodes of the spark plugs, which must be constantly cleaned.

The fuel filter can be changed somewhat less frequently than the air filter, as indicated in the product documentation. But the frequency of replacement is related to the quality of the fuel used. The task of this element is not much different from an air filter, with the only difference being that the fuel is already cleaned. A clogged filter does not clean it completely, which has a bad effect on throughput. All this together affects the car’s engine, which does not have enough power to spin up normally.

Manufacturers of fuel filter elements declare the need to replace them after 60,000 km, but domestic motorists should change filters much earlier, since our fuel is inferior in quality to European and American counterparts.

Depending on the type of engine, fuel filters are divided into several categories:

Injection – degree of purification up to 10 microns.
Carburetor - the cleaning level reaches 20 microns.
Diesel - less than 5 microns.

When buying a filter, you need to make sure that it matches your internal combustion engine. For each type of motor, manufacturers select material with such a degree of purification that debris does not penetrate into the internal components of the structure. Replacing will not take much of the driver’s time, but during work you must follow safety rules, for example, perform all operations outdoors or in a ventilated garage, do not smoke or use a lighter nearby.

The element is located next to the engine, but in some cars it can be found near the fuel pump. During the removal of used consumables, the engine is in running condition. The fuel pump fuse is blown, which leads to automatic stalling of the power unit.

This procedure is necessary in order to prevent the possibility of diesel (or gasoline) leaking when installing a new filter.

When the engine stalls, the ground of the fuel pump is turned off, the bolts of the old filter are carefully unscrewed, and the consumable itself is placed in some container so as not to get dirty. Again, the area where the consumables, all remaining debris and fuel are removed. Now you can install a new filter, simultaneously inserting the previously removed gaskets and sealing washers. The final stage is connecting the fuse and setting its weight.

Immediately after replacement, the engine will not start the first time because the fuel pressure has dropped to a critical level. After several attempts, the engine will start idling. If the problem was precisely the filter elements, then after replacing them the engine should gain the optimal number of revolutions even when climbing uphill on a steep slope.

4 Violation of the spark plug gap as a cause of poor internal combustion engine performance

Next possible reason Engine malfunction is a gap between the electrodes in the spark plugs. Minimal changes, per millimeter or even less, in mandatory will cause negative consequences when using the car. The result will be difficulty starting the car, increased fuel consumption, and a decrease in traction and engine speed.

Sparks with a specific current strength pass between the electrodes. Changing the distance between these elements affects the rate of combustion of the air-fuel mixture in the cylinders. The difference is tenths of a second, but this is more than enough to disrupt the optimal operating mode of the engine.

To check the gap you will need a special feeler gauge, which can be purchased at any car store. Referring to the documentation on vehicle, you can find out the correct distance between the electrodes, and this distance should be the same on all spark plugs.

If necessary, the probe allows you to bend or bend the upper electrode. This will avoid any errors. Most often, it is the spark plugs that are the main reason why the car drives unstably during acceleration and the engine does not develop required quantity rpm After repairs are carried out, these problems will be left behind.

5 Engine ignition timing

In the ignition system, the operation of other important elements that affect engine spin-up may be disrupted. A parameter such as the ignition timing plays an important role. If it is defined incorrectly, then Negative consequences won't keep you waiting long.

It is somewhat easier to detect a problem in injection power units, since there is a built-in on-board computer, and it is this element that is automatically responsible for setting the advance angle. Comes here Technical information about the operation of all main components and assemblies of the car. It is collected using numerous sensors:

throttle position;
oxygen;
air flow;
camshaft position;
fuel detonation;
crankshaft position.

Failure of these sensors leads to a failure in determining the advance angle, due to which the engine is unable to calculate the required number of revolutions for optimal operation. It is not possible to restore the functionality of these elements on your own, so the only option is to visit a service station.

As for carburetor engines, the advance angle in them can be adjusted manually. Finding the correct value is quite difficult, but it is still possible, and without the involvement of expensive specialists. But if possible, then it is better to leave this work to the craftsmen who will cope with the task quickly and reliably.

6 Other reasons for poor speed gain

When the engine does not rev up, problems may be related to the vehicle's fuel system. Thus, for a carburetor, when forming a fuel-air mixture, the fuel limit in the float chamber is of great importance. If the upper limit parameters are set low, the result is a small amount of fuel in the chamber. This has a noticeable effect on the engine, which does not have enough fuel to rev up to the required power.

Too high a limit won't do any good either. The fuel mixture becomes too rich, which is good, but it does not have enough time to fully warm up. The problem is resolved very quickly and simply - the float, which is responsible for determining the diesel level limit, carefully moves in the right direction.

In some situations, the problems may be more serious. Thus, problems associated with injectors negatively affect the operation of both diesel and gasoline units. To check the functionality of these elements, they should be dismantled and connected to a power source. If the spray produces a crooked and asymmetrical jet, it is recommended to replace the fuel system injectors with new ones. If the sprayer forms a beautiful and even “torch”, then there should be no complaints about this mechanism.

The most unpleasant scenario for the development of events is associated with a decrease in compression. Wear and failure of the structural elements of the piston group leads to a decrease in its level and, as a consequence, a decrease in the power of the power unit. You can verify that the piston is faulty using a special device - a compression gauge.

Readings ranging from 10 to 14 kg/sq.m. are considered normal. see. If the device produces lower values, then you will need major renovation internal combustion engine. In this case, it will not be possible to do without lengthy and costly repairs.

Any self-respecting driver will begin to find out the reasons why an injection engine does not develop full power, as soon as he notices a drop in the prescribed characteristics. Even if you don’t really need all the power of the car at the moment, slow acceleration or dullness when driving are very annoying.

In addition, such signs clearly indicate that not everything is in order with the engine. And even a beginner is clear that diagnostics cannot be skipped - this can lead to serious consequences that will cost more than eliminating the problem in its initial stage. And most drivers treat the car more like a friend than an object. And people care about the health of their loved ones on an instinctive level.

The reasons why an injection engine does not develop full power can be general - common to all types of engines - and individual, which are typical exclusively for injectors.

Can happen to anyone

With any engine organization, problems with a decrease in power can be caused by universal factors. Namely:

In the forefront, as always - bad fuel. If power is lost almost immediately after leaving the gas station, consider that the cause has been found. Additional symptoms may include difficulty starting the engine, carbon deposits on the spark plug contact group, and a red coating on their skirts. These signs will help determine the cause if gasoline was added to a good level and did not show itself immediately;
A clogged air filter also prevents the engine from developing the required power - the mixture is supplied with insufficient air, as a result of which it does not burn completely;
The filter is clogged, but this is a fuel filter. In this case, the mixture entering the engine is lean, insufficient to gain speed;
Worn out or dirty spark plugs. However, even beginners know this reason and check them first;
Problems with the catalyst - its contamination or final wear. The reason is disappointing, since the catalyst does not cost a penny, and it is not always possible to clean it. For this reason, some car owners simply remove it from the exhaust system;
The next assumption will be no less stressful - malfunctions in fuel system in the form of a fuel pump failure. Less catastrophic would be the depressurization of one of the pipes: here the spare parts are cheaper and the work is simpler;
And finally, the saddest thing is the malfunction of the unit itself. Moreover, not everyone can determine which node. This could be a violation of the gaps between the valves, a drop in compression, etc. In any case, deep study cannot be avoided.

Points 1 to 4 are easily detected and just as easily eliminated. With more complex ones, most people turn to the service.

Injection problems

If the car has been checked for general problems, but the cause of the loss of power has not been identified, we move on to the individual characteristics of the system.

The injectors are set to automatic. To set it correctly, you need to use the readings of many sensors. If one of them does not work, the onboard “brains” consider the situation to be an emergency and set a low angle, which leads to a drop in power.

You will have to check:

oxygen concentration sensors;
coolant temperature sensor;
phase sensor

Not only the sensors themselves require ringing, but also the circuits into which they are included - broken wiring or oxidation of the terminals lead to the same consequences as failure of the device.

If the sensors are operational, you will have to check the ECU: purely computer failures are quite possible;
Dirty or damaged injectors. Usually this is reported by the all-knowing Check. An ohmmeter is used to check the windings on the injectors and, naturally, the circuits leading to/from them;
The controller may also be faulty - this is also indicated in most cases by a lit Check. The fastest and most reliable way to check is to replace the part with a new working one. Naturally, you also need to check the wires with the contacts on it. Sadly, the injector itself may also fail.

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