To understand why the car does not start well when hot, the VAZ 2110 injector, you should know that this vehicle it is necessary to create optimal working conditions. Otherwise, system interruptions are possible, which lead to such a result.
It starts up well on a cold, but badly on a hot one - the main reasons
Often, in the morning, a cold car starts up well, but a hot one does not show any signs at all. In this case, there are many causes of malfunctions. They need to be eliminated quickly, because they can become sources of more serious damage.
The first reason why the car does not start well when hot, the VAZ 2110 injector is often low-quality fuel. The engine is started for a long time, but this does not bring results. To eliminate this problem, change the fuel.
A large number of additives have a bad effect on the engine:
- The supplied fuel does not meet the requirements of the engine, therefore it is perceived poorly.
- The filters are clogged with foreign additives. The pump is unable to supply sufficient fuel.
- Engine settings are lost. The supply of a combustible mixture in a hot state is insufficient.
Basic technical requirements for fuel characteristics
| Fuel characteristic (gasoline) | unit of measurement | Automotive regulations | ||
| ecological class 2 | ecological class 3 | ecological class 4 | ||
| Lead concentration, no more | mg / dm³ | 10 | 5 | 0 |
| Sulfur concentration, no more | mg / ct | 500 | 150 | 50 |
| Volume fraction of hydrocarbons, no more: | percent | |||
| aromatic | not installed | 42 | 35 | |
| olefinic | not installed | 18 | 18 | |
| Volume fraction of benzene, no more | percent | 5 | 1 | 1 |
| Mass fraction of oxygen, no more | percent | not installed | 2,7 | 2.7 |
| Saturated vapor pressure taking into account climatic conditions: | kPa | |||
| in summer | 45-80 | 45-80 | 45-80 | |
| in winter | 50-100 | 50-100 | 50-100 | |
| Intake valve deposits | not installed | compliance with European gasoline for automotive | ||
Volatility classes of motor gasoline according to DSTU 4839: 2007
| Indicators | Value for volatility classes | |||||
| A | V | C / C1 D / D, | E / E 1 | F / F 1 | ||
| 1. Pressure of saturated vapors, kPa, (TNP) within | 45,0-60,0 | 45,0-70,0 | 50,0-80,0 | 60,0-90,0 | 65,0-95,0 | 70,0-100,0 |
| 2. Fractional composition: | ||||||
| evaporates at a temperature of 70 ° C,% (vol.), (B70), within | 20,0-48,0 | 20,0-48,0 | 22,0-50,0 | 22,0-50,0 | 22,0-50,0 | 22,0-50,0 |
| evaporates at a temperature of 100 ° C,% (vol.), (B100), within | 46,0-71,0 | 46,0-71,0 | 46,0-71,0 | 46,0-71,0 | 46,0-71,0 | 46,0-71,0 |
| evaporates at a temperature of 150 ° C,% (vol.), (B150), within | 75,0 | 75,0 | 75,0 | 75,0 | 75,0 | 75,0 |
| end of boiling, ° С, not higher | 210 | 210 | 210 | 210 | 210 | 210 |
| the remainder in the flask,% (vol.), no more | 2 | 2 | 2 | 2 | 2 | 2 |
| 3. Vapor lock index (IPP) | - | - | C 1 | D 1 | E 1 | F 1 |
| no more (IPP = 10-DNP + 7-B70) | - | - | 1050 | 1150 | 1200 | 1250 |
Note. For gasoline of classes A, B, C, D, E, F, the vapor lock index is not standardized.
Often the VAZ 2110 injector does not start well when hot, due to overheating of the fuel pump. Moreover, the engine not only does not start, but stops on the move. This unit is cooled only by cold fuel passing through it. In hot weather, the balance is disturbed. The gas pump stops working.
In this case, you need to do the following:
- Take a rag and soak it in cold water.
- Place it on top of the fuel pump housing.
- Wait a while and try to start the car.
If there is no cold water at hand, then the car should be placed in the shade and the hood should be opened. As soon as the car cools down, it will start immediately.
However, you should be aware that an overheated fuel pump must be replaced, since it will no longer work normally in the previous mode.
The reason why the car does not start well when hot, the VAZ 2110 injector can be a position sensor crankshaft... Its failure is associated with an increase in engine temperature. If this happens, then its replacement is urgently required, because if the sensor is faulty, the car will not work. This is due to the fact that there is incorrect information about the position of the crankshaft. As a result, the flow of the fuel mixture will be biased.
You can replace this device at the station or yourself using a set of screwdrivers.
If the VAZ 2110 injector does not start well when hot, then this mass air flow sensor is one of the first to be checked. The reason for its failure is the negative environment. Starting a hot engine is very difficult. Even if the car starts up, the motor runs unstable. When you press the gas pedal, it can choke or sharply increase the speed.
This is due to the fact that the proportion is violated in the ratio: gasoline - air. The sensor is responsible for supplying this information.
If the check high-voltage wires causes certain difficulties, then the BB wires are checked by devices:
- tester;
- multimeter.
The resistance of these elements should be 5 ohms.
Starter
If it starts up badly on hot vaz 2110 injector 8 valves, then the reason may lie in the starter. For its normal operation, an additional relay is installed. After connecting it to the starter, it helps him in his work and there are no problems with starting the engine.
The video clearly shows where you need to install such a relay.
If a diesel engine running on diesel fuel does not start well on a VAZ 2110, then the reason may be fuel pump high pressure.
Breakdowns of the following nature happen:
- Bushings and oil seals are worn out. Due to this, there is a constant air leak. As a result, the required pressure is not generated in the plunger chamber. Replacement of bushings and oil seals is required.
- The injector pressure sensor is out of order. As a result, the fuel injection angle changes.
The gas system may malfunction after a short period of inactivity. This is due to the fact that overpressure is created in the tank due to the expansion of the gas. As a result, the proportion of air mixture and gas is violated. This makes it difficult to start the engine hot.
A bad start of the VAZ2110 engine on a hot one refers to complex breakdowns. If there is an obvious reason, the elimination is done by hand. But it is always possible. Often breakages do not lie on the surface. To establish them, special devices are required.
What is the reason why the injector takes a long time to start? The problem can be caused by various reasons, because the engine starts up for a long time, not only cold, but also hot. Could this mean that the rotation time of the starter has nothing to do with temperature or not?
Symptoms
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The estimated time considered to be long and during which the engine starts is 5 or 8 seconds. In this case, twitching is necessarily observed in the first seconds. ICE operation... At times, it seems that the motor is running on just two cylinders, not four.
If the accelerator is pressed before the plant, the start will be carried out faster. But at the same time, the fuel consumption and the engine warm-up time will increase until the speed drops to normal. Another inseparable companion of this situation is black exhaust.
Obviously, black smoke from the muffler directly indicates that the fuel is not completely consumed, remains in the cylinders.
Diagnostics
So, to determine the specific reason for the long-term start of the injection internal combustion engine, you should start with a high-quality diagnosis. Usually, the compression in the cylinders is checked. Its values must be within 12 atm for this to be considered the norm. At the same time, there should be no deviations between these indicators in each of the cylinders (maximum - 1 atm).
Then the candles are replaced without fail. The engine will be affected and will start to start much faster now. However, if the motor is not all right, then the normal start-up time will only last 1-2 days.
Therefore, you should also diagnose high-voltage wires. Diagnostics will allow you to find out if the cables have a breakdown, which is clearly visible by the emerging spark at night. This is done as follows: the car starts in the dark, at the same time you need to monitor which wire the spark breaks through.
The ignition coil must also be checked. Many experienced drivers do this: they install a known good and new module instead of their native module, then they check the engine start for several days. If everything is normal, the start is not long - it means that the whole thing was in the bobbin (ignition coil).
If there are no changes, the check continues. This time, you should test all filters, including the air one. Next - checking and replacing all sensors and regulators. Pay special attention to the mass air flow sensor.
The next step: testing various connections, checking the wiring for good contact, stripping the masses and flushing the throttle assembly.
If nothing changes again, it is recommended to check the ICE fan relay. Often because of it, similar problems with starting on an injection engine are possible. It will be possible to test the relay if you remove the wire from the temperature controller installed on the thermostat.
The fan should turn on after these steps. However, after measuring the resistance value on a heated internal combustion engine, the system can give low temperature data, although inside the motor it is clearly more than 90 degrees. Why is there such a difference? It turns out that this may well be buggy with DTOZH, which for some reason has not been tested before. It must show the real temperature of the coolant, otherwise chaos will begin in the system, and it is not surprising that the engine takes so long to start.
About DTOZH
Generally temperature sensors power unit Are the most important regulators injection engine... There are two of them on it. One is located directly in the cylinder head, it - gives the temperature value to the instrument panel.
The second is located in the thermostat, and provides data on the temperature of the control unit of the power unit. Based on the results obtained, the control unit regulates the fuel supply - it gives out more fuel to a cold internal combustion engine, and less to a hot one. In addition, it is the BU that regulates the UOZ, affects the ignition of the fuel assembly, and activates the coolant fan if the fluid temperature rises above 100 ° C.
Obviously, with faulty DTOZH, there will be difficulties in the operation of the motor. However, this is more about the DTOZH, which gives information directly to the block. For example, if DTOZH is buggy, it will give false values about a cold engine, although it is already boiling all over. The supply of fuel to the cylinders will increase, because this is provided by the system. Let's say you drove for a long time, then stopped, went into a store. Now, starting the powertrain will cause obvious displeasure, as it will take a very long time to start due to data failures and oversaturation.
At the same time, the UOZ, which is responsible for the ignition of a fuel assembly that is clearly over-enriched, changes greatly. As a result, the fuel will intensively evaporate, and the concentration of gasoline in the fuel assembly will be so high that the mixture will hardly ignite due to the small amount of oxygen.
It was said above that when you press the accelerator pedal, the start time will be noticeably reduced. Now it becomes clear why this is happening. By pressing the gas, we add oxygen to the fuel assembly, and the fuel ignites faster.
Thus, by replacing the faulty DTOZH, it is possible to solve not only the problem with the prolonged start of the internal combustion engine, but also other difficulties concerning the process of the engine and its cooling system. The motor after replacing the faulty DTOZH will add stability, throttle response and power.
DTOZH replacement procedure and terms
The procedure for replacing the DTOZH may differ depending on the car model. At the VAZ, to carry out the process, you need to prepare several tools, including a mandatory set of wrenches.
According to the classic scenario, the coolant will have to be drained, otherwise the replacement of DTOZH cannot be called correct. Although there are several replacement options that do not involve draining.
As mentioned above, one of the DTOZH is located in the thermostat. It is screwed in there from the side. The second is located a little lower, wrapped in the cylinder head.
A little about the timing of DTOZh replacement. If we are talking about a regulator that goes to the pointer, then it must be replaced at the very moment when the temperature values go astray. It is easy to check this: for example, on cold engine the coolant arrow tends to the red zone or just walks. This is an error and requires correction, i.e. replacement of the sensor.
In some cases, it also happens that it is not the regulator itself that is to blame, but the wiring or contact. You need to check everything, and only then decide whether to change or not. It is also easy to test the wiring: the wires are disconnected from the DTOZH, the ignition is turned on and a short to ground is made. If the arrow jumps up, then everything is in order with the wiring.
The second DTOZH changes in the event that the machine itself does not work correctly. For example, the revolutions on a cold engine do not increase, but on a hot one they reach a value of 1500 rpm. DTOZH malfunction number 2 can also be judged by the cooling fan, which turns on too early or does not do it at all.
The removed temperature controls are the easiest to check. They must be immersed in boiled water heated to certain values, then an ohmmeter must be connected to measure the resistance coming from the DTOZH.
The device of any car is complex. Domestic models are no exception. VAZ cars, like others, may experience unforeseen breakdowns. Most often, they lead to improper operation of all mechanisms, and sometimes even to their failure. Some car owners are faced with a problem - the VAZ 2110 does not start the 8-valve injector, the starter turns. The reasons for the breakdown and repair will be discussed below.
Often this problem occurs due to a battery that has become unusable. However, if the battery is fully charged and serviceable, then the failure is not related to it.
Causes
Why does the Vaz 2110 not start? This may be due to a malfunction:
- Fuel pump
- Crankshaft and camshaft sensors
- Spark plug
- Ignition coils.
The reasons have been considered, but how can they be eliminated? More on this below.
Fuel pump
If the battery is charged and serviceable, and the engine does not start well, then it is worth starting the check with the fuel pump. If it stops working, then the required amount of gasoline is not supplied to the engine, therefore starting is impossible.
To be sure of this, you need to check the spark at the spark plugs. If there is a spark, then the problem should be resolved after replacing the fuel pump.
Replacing the fuel pump is done as follows:
- Disconnect the negative terminal of the battery.
2. Then unscrew the fuel pump cover.
3. On next step you need to remove the connectors from the pump.
4. Now there is free access to the device. It is necessary to loosen the clamp of the fuel line.
5. At this stage, you need a key. Here you need to unscrew the lines, but before that, release the pressure. After dismantling, it is also recommended to replace the O-rings on the fuel lines.
6. Unscrew the bolts of the sealing cover (8 pcs.), And then remove it.
7. Now you need to remove the faulty fuel pump and install a new one in the reverse order.
Does not start on a warm engine
If the VAZ 2110 does not start well on a hot one, then the problem is most likely associated with the injectors. To check, you must try to start the engine. If at the same time the starter turns, the fuel pump is working properly, and the candles are flooded, it means that the nozzles are clogged. They need to be rinsed. However, the nozzles must be removed first. Here's the instruction:
- First you need to dismantle the injectors. To do this, wait for the engine to cool, then disconnect the fuel pump connectors;
- Start the engine and repeat until there is no reaction to the key turns. This way you can reduce the pressure in the power supply system;
- Remove the negative terminal from the battery, as well as from the ramp, you need to disconnect the pipes and connectors;
- Dismantle the intake manifold together with the throttle valve and the pipe;
- Now you can start removing the fuel rail along with the injectors;
- From it you need to disconnect the fastening brackets and dismantle the nozzles.
Flushing nozzles:
- The first step is to remove the rubber rings. Then it is best to install new ones in their place;
- Now you need to clean the nozzles as well as the funnel-shaped surfaces;
- Next, you need to simulate the operation of the injectors in the engine by connecting 2 wires from the battery to them, as well as a button;
- To flush the nozzles, you need to prepare a cleaning liquid that can be poured into a cylinder for cleaning carburetors. It must be connected to the nozzles as tightly and tightly as possible;
- Now you need to supply the rinsing agent and at the same time press the button. This should be continued until the liquid comes out evenly from the nebulizer. After that, the process can be considered complete.
Cold engine won't start
What to do if the VAZ 2110 cold starts badly? If at the same time the starter turns, the battery is working, but the start still does not occur, then you need to pay attention to the spark plugs.
What to do? The candles must be unscrewed, and then the new ones must be heated and installed. Then start the engine. If it starts, then the problem was faulty spark plugs. If the problem does not go away, then you need to contact the service station, since you cannot fix such a malfunction on your own. We need diagnostics.
The motor starts and stalls
Some owners of the VAZ 2110 8-valve injector also face such a problem that the engine starts and immediately stalls. In this case, as a rule, a light on the instrument panel with an exclamation mark comes on. This indicates that the starter must be replaced as it has deteriorated.
Replacement process:
- For the convenience of dismantling, it is best to remove the air filter housing, and it is also necessary to disconnect the negative terminal from the battery;
- Now there is free access to the starter. On it you need to disconnect the traction relay connector
- Using a 13 key, unscrew the wire from the positive terminal of the starter, and then disconnect the wire
4. Now you need to unscrew the 3 mounting bolts, and then remove the old starter and install a new one.
Output
As it turned out, the problem with the fact that the VAZ 2110 car injector of 8 valves does not start is not as terrible as it might seem at first glance. To eliminate it, you just need to identify the cause of the malfunction and eliminate it.
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Asks: Baranov Ivan.
Essence of the question: Does the VAZ-2112 car not start on a cold one? What to do?
Good afternoon, I have a VAZ-2112 2005 release, from 16 valve motor... And not so long ago, on a cold one, I began to experience difficulties with launching it. At the same time, it may simply not start, and sometimes it is difficult to start. Tell me what could be wrong?
There can be many reasons that after a night parking a motorist is faced with a difficult engine start. This also applies to those situations when the car was started in the evening without any defects, and already in the morning there were problems, as they say on the face.
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All my life I've been surrounded by cars! At first, in the village, in the first grade, I was running around on a tractor through the fields, then there was JAWA, after a penny. Now I am a third-year student of the "Polytechnic" at the automotive department. I work as a car mechanic, helping to repair cars to all my friends.
In this article, we will analyze what the most basic reasons affect the difficult start of the VAZ-2112 with a cold engine and how you can quickly solve them.
The video above shows a standard example of how a VAZ-2112 cannot start on a cold one.
Start principle
In order to know why the engine does not start, you need to know exactly how it works. The basis for starting the engine, which depends on the ignition system and the fuel-air mixture, which is supplied in certain proportions. Therefore, if any of these components does not work as it should, the launch becomes difficult, or simply impossible.
Main reasons
Among all the reasons why starting the engine can be difficult, there are the main ones that stand out on a poor start of a cold engine:
- Low battery battery
- this reason most often occurs in the cold season, when the ambient temperature is significantly below 0 degrees Celsius. Since in such conditions a planted car battery can lose its charge very quickly. This problem can be solved by simply replacing the battery with a new one, or by periodically servicing the old one to recharge it.
The battery was running out on the editorial machine. True, it was an 8-valve VAZ-2112. But the meaning is the same.
- Examining the ignition system further, pay attention to condition of individual coils and spark plugs... Check them for cracks and visible signs of wear. Also pay special attention to the condition of the working surface of the candles, as their condition can tell a lot.
The dismantling order does not matter.
- Check the fuel rail pressure on how to do it correctly.
Actually, the ramp is under pressure
- although not the main one, it can also be the reason for the difficult starting of the engine. ...
Throttle valve before and after cleaning
- Air filter and mass air flow sensor
– air filter must be clean so that all the necessary air mass passes into the cylinders and mixes with the required amount of fuel. What to do, if .
We connect the probes of the measuring device: red to yellow, and black to green (to the mass of the sensor).
Insufficient oil pressure in the engine
This reason is characteristic precisely on a cold engine, since it is much more difficult for thickened oil with insufficient pressure to break through to the main components and assemblies of the engine. In this case, it is possible to notice. However, as follows from practice, such problems are not common.
As you can see, problems with starting the engine on a cold are not uncommon and there may be various reasons for this. They should be solved from the least difficult to the most. Since even a minor problem in a small unit can serve as a failure to start the entire engine.
How easy it is to start in a cold winter
Advice! In order to make starting the engine in the cold season much easier, we recommend installing an alarm in the auto start on the car.
Warming up every certain time. Fuel consumption will suffer, but the likelihood of starting in severe frost will increase
If the temperature drops below 20 degrees with minus, then you can set up automatic engine start every three hours. This will allow not only getting into a warm car in winter, but also will not allow the oil to thicken during severe night frosts, which will certainly have a beneficial effect on the condition of the engine as a whole.
Among the existing reasons due to which the engine starts poorly, several must be highlighted:
- Discharged battery. This is a common cause and usually occurs in winter, when the air temperature is much below freezing. In such conditions, a weak car battery loses its residual charge very dynamically. This problem can be solved quickly enough. You need to change the battery to a new one or charge the old one well.
- Fuel pump. The vehicle will still not start with normal starting battery power. The second cause of the problem is likely to be found in the fuel pump. Your car engine may not start due to a lack of gasoline in the fuel system... This may be due to an inoperative petrol pump supplying fuel from the petrol tank. It is quite simple to check this malfunction. If there is a spark in the candles, but the engine does not start, then the reason for the downtime is the gas pump.
- Sensors. The next, no less common cause can be crankshaft sensors or camshaft... These devices are similar, but they are located in different places: above and below the car. If the battery is fully charged, and the fuel pump is in order, then you need to check the condition of the sensors. You can diagnose the condition of the sensors at the service station or on your own. Check if there is a spark on the spark plugs when you turn on the ignition. If there is no spark, the cause may be an inoperative sensor.
- Candles. They are responsible for supplying the spark, which is needed to ignite the air-fuel mixture. The candles under constant loads fail, become dirty, and become covered with carbon deposits. Therefore, you need to check their condition, remove carbon deposits and rinse. But it is better to replace them with new ones at the time of checking. If the engine starts, leave them in place. If not, keep looking for the problem area.
- Signaling. In some cases, it happens that a faulty alarm affects the operation of the ignition system. If the cause of the breakdown was not found in the previous elements of the car, you need to check this option. The reason a car does not start well is rarely related to the alarm, but it is still worth checking out.
- Gas distribution mechanism. It is difficult to diagnose the injection VAZ-2110 on your own, therefore it is better if this work is performed by service station specialists on the necessary equipment. To prevent malfunctions of the gas distribution mechanism, do not fill the gas tank with fuel with a low octane number. Best option for a VAZ-2110 with an injector, this is the AI-95, or in the extreme case, the AI-92.
- Ignition. Perhaps your car is simply out of ignition, which makes it difficult to start. In this case, the fault will be early or late ignition, which appears due to vibration. Over time, the distributor cover on the car rotates slightly, as a result of which the spark is unevenly supplied. This leads to incomplete combustion of fuel in the cylinders, and the engine begins to triple. You can get rid of this problem by rotating the distributor cover counterclockwise.
