VAZ-2112 injector 16 valves does not start well when cold: reasons

Car : VAZ-2112. Asks : Baranov Ivan. The essence of the question : The VAZ-2112 car does not start when cold? What to do?

Good afternoon, I have a VAZ-2112 produced in 2005, with a 16-valve engine. And not so long ago, when it was cold, I began to experience difficulty starting it. At the same time, it may simply not start, and sometimes it starts with difficulty. Tell me what could be the matter?

Won't start in the morning? Let's fix it!

There can be many reasons why a motorist finds it difficult to start the engine after parking overnight. This also applies to those situations where the car was started in the evening without any defects, but in the very morning the problems, as they say, are obvious.

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• About the expert:

All my life I have been surrounded by cars! First, in the village, already in the first grade, I was rushing around on a tractor through the fields, then there was JAVA, then a penny. Now I am a third-year student at the Polytechnic Faculty of Automotive Engineering. I work part-time as a car mechanic and help repair cars for all my friends.

In this article, we will look at what are the main reasons that influence the difficulty of starting a 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 when cold.

Insufficient engine oil pressure

ALSO, THE CAUSE OF DIFFICULT STARTING OF THE ENGINE WHEN COLD MAY BE INSUFFICIENT OIL PRESSURE IN THE SYSTEM. IN THIS CASE, THE LOW OIL PRESSURE ALARM SHOULD HAVE WARNED YOU ABOUT THIS DURING A PREVIOUS TRIP. MORE ABOUT NORMAL OIL PRESSURE IN THIS ARTICLE!

This reason typically appears on a cold engine, since it is much more difficult for thickened oil with insufficient pressure to reach the main components and assemblies of the engine. In this case, you may notice a low oil pressure warning light. However, as follows from practice, such problems do not occur often.

As you can see, problems with starting the engine when cold are not uncommon and there can be various reasons for this. They should be solved from least difficult to most difficult. Since even a minor problem in a small unit can prevent the entire engine from starting.

Doesn't start well and boils

In this case, the reason lies in the coolant. Check its level. If necessary, dilute with distilled water. However, there is no need to mix different brands of antifreeze. It may foam, which will further accelerate overheating.

The thermostat may also break. The VAZ 2110 8-valve injector is equipped with a two-piston element. It's very easy to check. To do this, you need a burner and a pan of water. Place the thermostat in the container and wait for the water to boil. If bubbles appear and the piston does not move, it means the element is faulty. The temperature at which it should operate is indicated on the metal body of the thermostat. The element cannot be repaired - it must only be replaced. As a result, the system is unable to regulate the operating temperature of the antifreeze. The coolant moves only in a small circle. But the car may start poorly (every once in a while) due to an incorrectly adjusted ignition. Most "ten" cars have a distributor ignition. Here you need to set the correct lead angle.

What could happen to electrical equipment?

If there is something to burn in the working cylinders, then you need to look for what will make the mixture burn

This means that you need to pay attention to the car's ignition system. This could be the ignition distributor, high-voltage coil and wires, spark plugs

It doesn’t happen that all devices fail at the same time, so we should talk about them separately.

We will assume that the distributor is installed correctly; in this case, a failure may occur through a breakdown of the cover or slider, or a failure of the Hall sensor. However, most often the cause is poor contact in the power connector of the ignition distributor. An ignition module or coils that do not produce high voltage to produce a spark at the spark plugs can create problems.

Injectors work in conjunction with ignition modules, of which there are usually two per engine. One ensures the operation of cylinders 1 and 4, and the second - cylinders 2 and 3. In these systems, the electronic control unit, which generates control pulses for all systems, including the ignition, may be problematic. This block can only be checked by replacing it. The same can be done with ignition modules.

Sometimes the fault may come from the high voltage coil. it does not generate voltage that can create a spark to ignite the air-fuel mixture. You can check its operation if you unscrew the spark plug from the cylinder and, together with the high-voltage wire, ensure its contact with the engine ground. At this time, you need to crank the starter and watch the spark plug. The absence of a spark confirms that the ignition coil is faulty.

It is impossible not to dwell on such elements of ignition systems as spark plugs. They are the ones who ignite the combustible mixture in the working cylinders of the engine. During their operation, the metal parts of their electrodes burn out, after which the gap increases, starting the motor becomes more difficult, or even becomes impossible. Check the condition of the spark plugs regularly, especially their gap. then problems can be avoided.

You can continue to review situations when the starter turns, but the VAZ 2110, 2112, 2114 does not start. It is simply impossible to take into account absolutely all cases, but to avoid such situations, carry out routine maintenance of the machine in a timely manner, use only high-quality operating fluids.

VAZ 2110 won't start, the injector turns the starter

Probably every motorist has encountered a situation in which your car does not start, and there is little pleasure in it, especially if it happens on the road.

To begin with, it is recommended to conduct a general diagnostic of the engine and try to identify the malfunction. In this situation, in order to determine the malfunction of the VAZ 2110 power plant, it is recommended to check all operating systems of the engine, proceeding from general to specific.

Ignition coil

If there is electricity in the circuit, it is the coil that almost completely fails.
There is no point in repairing it, so the unit must be replaced with a working one. As practice shows, problems with the winding often arise due to poor contact of the electrical wiring connected to it. Often the reason for this is banal pollution.

When the above manipulations do not bring results, it is necessary to check the functionality of the switch or distributor in the engine (depending on the type of power plant - injector or carburetor).

To do this, remove the protective cover and:

• check the presence of current with a tester;
• clean contacts from dirt;
• make sure they are held securely.

All other wiring problems must be repaired only at a service center. The thing is that only a few car enthusiasts are able to carry out diagnostics on their own. In addition, this requires special professional equipment.

Incorrect operation of electrical equipment

Most often, the cause of the malfunction lies in incorrect operation of electrical equipment. This is one of the most common problems associated with failure to start. The first thing to check is the operation of the electronic control unit. It looks like this:

Often water simply gets into contact groups and other components of the ignition system. This leads to oxidation of contacts and lack of voltage supply.

Problems may be related to the fuel pump relay, as well as the starter. You should not forget about checking contacts and various connections. Often the problem lies in the “ground” - zero is simply missing in the wiring.

Sometimes the reason for the impossibility of starting lies in the alarm system - its breakdown or incorrect setting often leads to the impossibility of starting the engine. In the absence of the necessary tools and experience in installing alarms, it will be difficult to cope with the problem on your own.

Messages 15

1 Topic by vam_sam 2017-04-28 00:52:36 (2017-04-28 00:56:31 edited by vam_sam)

• vam_sam
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• Registration: 2015-08-14
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• Car: VAZ 2111

Topic: Very difficult to start, especially when cold, takes a long time to turn (video)

Hello everyone, I’m back with my 21113 16kl, the car still starts up disgustingly. Namely, it doesn’t start right away, but it spins for 4 seconds, after which it farts for 2-3 seconds with vibration in the body and rpm of 850-1000, after which the warm-up starts at 1300, this happens only after a long stay, if the engine is warm, it starts without this, but it also turns for a long time, but for some reason immediately after starting it drops the revolutions to 500, and gets up to 850 immediately after a second. I decided to write because today I decided to blow out the cylinders, in the end it stopped gripping altogether, only if I give it some gas, I’m fundamentally not happy with it. The fuel pump and air flow sensor are working properly, the spark plugs are January, the same thing happened on the old ones. This is a very tough option at -20, it seems like it was in the winter [video], and this is also not what it usually is, but almost imperceptibly [video], something consistently happens between the first and second video. Where to dig? For now, the plan is to try replacing the ignition module and wires, but if you pull the current ones one by one, the engine starts to shake

Main reasons

Among all the reasons why starting an engine can be difficult, we can highlight the main ones that stand out for poor starting of a cold engine:

• Low battery charge level - this reason most often occurs in the cold season, when the ambient temperature is significantly below 0 degrees Celsius. Because in such conditions, a dead car battery can lose its charge very quickly. This problem can be solved by simply replacing the battery with a new one, or periodically servicing the old one to recharge it.

The battery on the editorial car was running low. True, it was an 8-valve VAZ-2112. But the meaning is the same.

• When further inspecting the ignition system, pay attention to the condition of the 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 order of dismantling does not matter.

• Check the fuel rail pressure.

Actually, the ramp is under pressure

• A clogged throttle valve, although not the main one, can also be the cause of difficult engine starting. It needs to be cleaned.

Throttle valve before and after cleaning
Air filter and mass air flow sensor - the air filter must be clean so that all the necessary air mass passes into the cylinders and mixes with the required amount of fuel.

We connect the probes of the measuring device: red to yellow, and black to green (to sensor ground).

Diagnostics

So, to determine the specific reason for the long start-up of an injection-injected internal combustion engine, you should start with a high-quality diagnosis. Usually, they check the compression in the cylinders. Its values ​​must be within 12 atm for this to be considered normal. In this case, there should be no deviations between these indicators in each of the cylinders (maximum - 1 atm).

Then the spark plugs must be replaced. This will have an effect on the engine and it will now start much faster. However, if everything is not in order with the motor, then the normal starting time will last only 1-2 days.

Therefore, high-voltage wires should also be diagnosed. Diagnostics will make it possible to find out whether the cables have a breakdown, which is clearly visible by the spark coming out at night. This is done as follows: the car starts in the dark, at the same time you need to monitor which wire sparks.

The ignition coil also needs to be checked. Many experienced drivers do this: they install a known good and new module instead of the original one, then check the engine starting for several days. If everything is normal, the start-up does not take long - it means that the whole problem was in the bobbin (ignition coil).

If there are no changes, the test continues. This time you should test all filters, including the air filter. Next - check and replace all sensors and regulators

Pay special attention to the air flow sensor

The next stage: testing various connections, checking the wiring for good contact, cleaning the masses and flushing the throttle assembly.

If nothing changes again, then it is recommended to check the engine fan relay. It often causes similar problems with starting on a fuel-injected internal combustion engine. You can 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 warm internal combustion engine, the system can produce low temperature data, although the temperature inside the engine is clearly more than 90 degrees. Why is there such a difference? It turns out that this may well be a buggy DTOZH, which for some reason was not checked earlier. It must show the real coolant temperature, otherwise chaos will begin in the system, and it is not surprising that the engine takes so long to start.

Why the 16 valve VAZ-2112 injector does not start well when cold: reasons and repairs

Car : VAZ-2112. Asks : Baranov Ivan. The essence of the question : The VAZ-2112 car does not start when cold? What to do?

Good afternoon, I have a VAZ-2112 produced in 2005, with a 16-valve engine. And not so long ago, when it was cold, I began to experience difficulty starting it. At the same time, it may simply not start, and sometimes it starts with difficulty. Tell me what could be the matter?

The principle of starting the injector 2112

In order to know why the engine does not start, you need to know exactly how it works. The basis for starting the engine is a spark, 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, startup becomes difficult or simply impossible.

Temperature sensor

When they, or even just one of them, are faulty, the vehicle's on-board computer is unable to properly test the engine and therefore cannot deliver the required amount of fuel to the cylinders. In this situation, the correct and least expensive option would be to replace the control device that has become unusable. Of course, there is a theoretical possibility of testing it for suitability, but in reality it is difficult to do this at home, since special equipment is required. Calling a car service for this will require quite a lot of money and time.

About DTOZH

In general, power unit temperature sensors are the most important regulators of an injection engine. There are two of them on it. One is located directly in the cylinder head, it displays the temperature value on the instrument panel.

The second one 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 supplies more fuel to a cold internal combustion engine, and less to a hot one. In addition, it is the control unit that regulates the OZ, influences the ignition of the fuel assembly, and activates the coolant fan if the liquid temperature rises above 100 °C.

Obviously, with faulty DTOZh there will be difficulties in the operation of the motor. However, this applies more to the DTOZH, which provides information directly to the block. For example, if the DTOZH is faulty, it will give false values ​​about a cold engine, although it is already boiling. 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 and went into a store. Now starting the power unit will cause obvious displeasure, since it will take a very long time to start due to data failures and oversaturation.

At the same time, the SOP, which is responsible for the ignition of a fuel assembly that is clearly over-enriched, changes greatly. As a result, the fuel will evaporate intensively, 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 startup time will be noticeably reduced. Now it becomes clear why this happens. By pressing the gas, we add oxygen to the fuel assembly, and the fuel ignites faster.

Thus, by replacing a faulty DTOZh, you can solve not only the problem with long-term starting of the internal combustion engine, but also other difficulties relating to the process of engine operation and its cooling system. The engine, after replacing the faulty DTOZH, will add stability, throttle response and power.

How to start easier in cold winter

Advice! To make starting the engine in the cold season much easier, we recommend installing an auto-start alarm on your 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 minus, you can set the engine to automatically start every three hours. This will not only allow you to get into a warm car in winter, but will also prevent the oil from thickening too much during severe night frosts, which will certainly have a beneficial effect on the condition of the engine as a whole.

Probable Causes

First of all, you should make sure that the temperature sensors installed in the car remain in proper working order. According to the manufacturer's requirements, monitoring devices must be changed regularly.

In addition, the following reasons are the most common in a situation where the engine (including the one on which the injector is installed) of the VAZ-2110 starts very poorly in the morning when it’s cold:

• timing belt wear;
• damage to the insulating sheath of electrical wiring;
• problems with the ignition mechanism.

It is worth recognizing that this list is completely incomplete. But these are the most common reasons.

Troit VAZ 21124 16 cl.

Tell me this question. Troit, at first the check light would light up from time to time, then go out and light up again. Now it doesn’t light up and eventually it started to light up. The computer doesn't see it. I visited two diagnosticians, changed spark plugs, caps, IAC, TPS

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Sasha, it seems you are already starting to not believe yourself. I wrote to you only the truth and nothing but the truth, based on my own experience. I know for sure that there are 2 (two) sensors in the mass air flow sensor housing. I have already written about this and shown it in photographs. I held this case in my hands, touched each sensor with my fingers and examined it. See above. You wrote that you measured the parameters of the mass air flow sensor - it shows about 1.0 volts. We note that you have confirmed that there is one of the sensors in this housing. Further, you wrote on August 10 at 11:48 “Inside there is what is in the last picture. ", with this you confirmed that there is a second sensor. We fix it - there are 2, two different sensors in one housing. Because that second photo shows a thermistor - a temperature sensor.

Look at the photo, the red rectangle on the wire is a resistor that changes the resistance depending on the air temperature and transmits this data to the controller.

The antennae are not soldered there. Just inserted and clamped

There is a plastic wall between the MAF and DTVV. They are neighbors

In the bottom photo, we see the intake air temperature sensor from above, and the mass air flow sensor is there, as it were, inside (shown by blue arrows, the air flow went through it)

Candles

This is where you should start checking the power plant. The fact that they are probably not functioning correctly is indicated by the discovery of:

It would probably be easier for a novice driver to simply change them all together. Those who already have sufficient experience in operating domestic cars can easily revive spark plugs. To do this they need:

• clean from dirt;
• get rid of soot;
• warm up with a blowtorch.

When, even after replacing the spark plugs, the engine still does not start, you have to look further for the cause of the damage.

Why isn't the car .

The main reasons why the car is bad

starts when cold are:

Low quality gasoline

There is no common method for assessing fuel quality. You have to use indirect signs, for example, a bad factory after refueling at an untested gas station. At the same time, while your car does not start, there is a high chance of the battery dying, “killing the spark plugs,” clogging the injector, and even destroying the engine in case of improper detonation.

If bad

The engine starts when hot, the reason is probably due to unsuccessful refueling. The solution to this problem is the use of additives in the gas tank that improve the basic characteristics of gasoline.

To protect yourself from the consequences of refueling with low-quality fuel and keep the injector in good condition, we recommend that you always keep on hand the long-term injector cleaner Langzeit Injection Reiniger for gasoline engines and the long-term diesel additive Langzeit Diesel Additiv for diesel engines.

It is recommended to use these fuel additives when refueling at untested gas stations, as well as on highways.

Long engine start VAZ 2112 (12 series) Late Start Black Swallow

Possible malfunctions in the timing belt

• the timing belt slips through the pulley teeth by 1-2 positions. Because of this, the position of the valve timing changes and the engine may not start at all.
• Slipping of the camshaft pulley or damage to the shaft.
• Malfunction or incorrect operation of the crankshaft position sensor.

In a situation where it is not possible, from a technical point of view, to identify a malfunction using general diagnostics, it is necessary to carry out general computer diagnostics of the engine with connection to the ECU

If you find an error, please select a piece of text and press Ctrl+Enter.

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Post edited by Kostik(tm): 12/31/2008 - 09:31

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Post edited by VAZ2111: 12/31/2008 - 10:13

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That's how it was.

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Timing belt broke

VAZ 2110 does not start, the starter turns - perhaps the reason lies in a broken timing belt?

The engine gas distribution mechanism is driven by the crankshaft gear. Initially, chains were used for this purpose, and timing belts, which began to be widely used about twenty years ago, aroused mistrust among car owners.

The undoubted advantages of a belt drive over a chain drive are its simple design, low weight and low noise. However, it is not without its drawbacks, the main one of which is the relatively short resource of the timing belt.

Of course, a faulty, torn or misaligned timing belt also causes the VAZ 2110 to fail to start. By the way, on stock, non-deformed models of the 21120 engine, a torn timing belt also causes valve deformation and requires additional repairs. In this case, driving even after replacing the belt without restoring the valves is impossible.

New timing belt VAZ 2110

Check for the presence of a spark in the spark plugs visually by turning on the ignition and pressing the outer metal part of the spark plug against the unpainted metal body of the car or against structural elements. Do not forget that all electrical parts of the product are under high voltage, so it is better to carry out work with insulating gloves. If there is no spark on only one spark plug, be sure to check the others and draw the appropriate conclusions.

The consequences of a broken timing belt depend entirely on the design of the power unit. To imagine what will happen at this moment, you need to turn to the mechanics of the internal combustion engine.

In a running engine, the pistons continuously move from one dead center to another. During the intake stroke, the piston moves down and the intake valve opens; during the exhaust stroke, the exhaust valve opens and the piston moves up. At the moment when the piston is at top dead center, all valves must be closed. If the timing belt breaks, the camshaft stops rotating and the valves stop in one position. At the same time, the crankshaft continues to rotate by inertia, and the pistons rush towards the open valves.

Timing belt VAZ 2110 OPEN

In some engines, for example, the 8-valve VAZ-2111, the pistons have special recesses to avoid contact with the valves in the event of a break. In this case, there will be no consequences, except that the car will not be able to get to the garage or workshop under its own power.

VAZ 2110 engine 16 valves, technical characteristics, timing device and diagram

The VAZ 2110 engine with 16 valves is the most powerful and dynamic engine of the “ten”, at the same time making a car with such a power unit quite difficult to repair and maintain.

Gasoline injection engines VAZ 2110 16 cl. two, one with a working volume of 1.5 liters (VAZ-2112) and the second with a volume of 1.6 liters (VAZ-21124). The VAZ-2112 engine has one significant problem. When the timing belt breaks, the valves hit the piston. Actually, the cross-sectional image of this 16-valve engine gives a clear idea of ​​the actual lack of sufficient clearance between the valve plates and the piston crown. That is, when the belt breaks and the piston moves to the top point by inertia, the valve can be opened and an inevitable blow occurs. Usually, when this happens, the valves bend. And in the worst case, they break, turning the combustion chamber and piston bottom into metal crumbs.

Actually, in the 1.6 liter engine (VAZ-2112) this problem no longer exists. The valves don't bend there. This was achieved by using new pistons with a special bottom shape, which has recesses in case the timing belt breaks. Let's look at photos of similar pistons below.

Below are detailed characteristics of VAZ 2110 16 valve engines.

Carburetor

If there is a problem with it, you must first clean it. With such a task, it is better to turn to specialists - they, in particular, are able to quickly:

• adjust the carburetor;
• clean its dampers;
• check compression.

In severe cases, it is necessary to rinse it completely. However, sometimes the car does not start due to the fact that the bimetallic plate, intended specifically for the cold start of a power plant with a carburetor, has become unusable.