Why is there no spark in the first cylinder of a VAZ 2112 16 valve

MAIN REASONS WHY THERE IS NO SPARK APPEARING IN THE IGNITION SYSTEM

In the VAZ 2110 car, injector errors appear quite often. You can see them on the on-board computer, but special tables are needed to decipher them. After all, the ECU produces errors in the form of codes that consist of the letter P and four numbers. Before you begin to solve the problem that has arisen, you should find out what problems there are in the VAZ car.

What you need to know about diagnostics

Simple advice: you don’t need to take your car to be scanned. Due to the fact that laptops are now in almost every home, there are a lot of unscrupulous establishments where you can undergo such a check. When the program does not notice any errors, they tell you that there is nothing wrong with your car. By and large, this diagnosis can be called a simple pumping of money.

A good diagnosis should proceed as follows:

• Errors are read first.

• The signals coming from the sensors on the injector are checked.

• The pressure created by the fuel is measured.

At the very end, you should receive the correct answer about what happened and what you have to do with the car in the future.

If a car enthusiast has an engineering streak, he can try to find the reason why the VAZ-2112 does not start. In this case, you can fix the problem yourself, saving on service costs.

VAZ injector errors

Errors can relate to any part of the car:

Sensors Most often, temperature sensors suffer, as they can overheat too much;
Injectors. Mostly, problems are observed due to an open circuit, as a result of which they cannot light up in time. This leads to another problem - the spark has disappeared, so the engine does not start;
Engine. The most common mistake is overheating. Most often, due to increased oiliness, the spark plugs also overheat, so a spark does not appear. As a result, the engine does not emit any signs of life;
Valves. They can also be too dirty, which will cause them to close, so they will not pass the fuel-air mixture;
Fans. If they do not work correctly, the machine overheats.

VAZ 2112 2001 No Spark on 2-3 Cylinders

#1 ace

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#2 aslan

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So we have 2112 16kl 1.5, 2001. there is no spark on 2-3 cylinders, further testing revealed that there is no signal from the ECU to them. The ECU is Bosch 1.5.4, although it is not essential that January 5.1.2 was installed on this car, the picture remained the same. The coil is known to be in good order, plus there is a minus from the ignition, the ECU was also checked on another car, the connecting wires to the ECU ring without breaks or resistance, the ECU communicates, there are no errors. although on the Boche the crankshaft sensor popped up. The question is what is the ambush?

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#3 unsed

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#4 evgegor

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#5 ace

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The disk is ideal, I felt the wiring centimeter by hand, are there any other side reasons, like 10V power supply or something similar?

I unpicked the connector, everything is fine, the pins match

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#6 Alex905

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#7 melnik-1

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#8 ace

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The car was made on the road, in the field, so to speak, the oscillators will be there tomorrow, it was checked for a spark gap

The contacts are in their places, as are the pins, I’m stunned, apparently Bosch is doing something weird, we’ll sort it out tomorrow

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#9 Alex905

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APC ADACT
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ARS ADACT develops firmware for chip tuning of gasoline and diesel engines. Ready-made calibrations for any task are available in the official store: more than 60 brands and 300 models, for LPG, with the transition to other Euro standards and preservation of factory ones. If there is no ready-made firmware, you can order individual calibration for any task.

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What if the spark is lost?

If the engine does not start, but sounds are made indicating that the fuel pump is working, you should pay attention to the operation of the ignition. First of all, you should check whether the spark has disappeared on the wires with high resistance. To do this, it is necessary to use a spark gap, as well as a Hall sensor, which checks the presence of a magnetic field.

WHEN THE ARRESTER IS CONNECTED TO THE VAZ CAR, IT IS NECESSARY TO TURN THE ENGINE WITH THE STARTER. TYPICALLY, A SPARK WILL BE OBSERVED DURING THIS PROCESS. IF IT IS NOT, IT MEANS THERE IS NO BREAKDOWN TO GROUND OF THE WIRE. IT IS COMPLETELY POSSIBLE THAT THE SPARK HAS DISAPPEARED DUE TO A BREAKDOWN OF SOME WIRE. IF THERE IS NO SPARK ON SEVERAL WIRES AT THE SAME TIME, THEN THE CONTROLLER IS MOST LIKELY FALSE.

The possibility of breaking high-resistance wires is also not worth it. To do this, you can use a Hall Sensor, which helps measure the current in conductors, as well as their resistance. To check the operation of the ignition coils, you should pay attention to whether there are any error codes on the controller. If there is no spark after replacing the coil, then the controller is faulty.

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Method No. 2: Spark piezoelectric probe (for example, Test-M) or lighter.

If you don’t have a ready-made device at hand, you can use an element from a piezo lighter instead. The principle of testing is similar: we connect the device to the upper contact of the spark plug and to the body. The button is pressed, if a spark jumps, then the spark plug is working; if it drips or is missing, then it is broken. Details in the video:

Method number 3: Use a multimeter. You should check the electrical circuit of the central electrode by setting the device to 20 kOhm.

If there is “contact” between the central electrode and the tip (shows resistance), then the reason for the lack of a spark may be damage to the insulator. Video example:

Each type of candle must have its own resistance. This verification method is less accurate.

These methods work, but they cannot determine the serviceability of the spark plug 100%. For example, a spark plug installed in an engine has a bad spark, but when checked it will look like it is fully working. Why? In open air, the voltage required to form a spark is much less than in a cylinder. In the combustion chamber of an engine, a spark appears in the presence of a compressed air-combustible mixture.

Testing for spark

If there is an ignition coil on each of the engine cylinders, then testing for the presence of a spark occurs somewhat differently. In this case you will also need a Hall Sensor. If there is no spark on only one coil, then it should be replaced. But if it doesn't appear at all, then the problem is much more complicated. In this case, the problem may be due to a faulty controller or broken wiring.

To more easily test the presence of a spark discharge, it is advisable to use a Hall Sensor.

It must be brought to the faulty coil and turned on. If the arrow starts to rise, it means there is current in the wires.

Nothing happens when I turn the key in the lock.

If the starter does not turn, then the spark has disappeared between the ignition switch and the starter. This most often happens when the battery is low or faulty. When checking with a voltmeter, a normal battery should show at least 11.8 V, and when diagnosing with a hydrometer in each jar during measurements, the data should not be lower than 1.22.

Other causes of problems with engine starting may be breakdowns:

The ignition lock cylinder makes itself known the moment you insert and turn the key. If this happens too easily or, on the contrary, you feel difficulties, then the problem is in the lock. It needs to be replaced with a working one.
The starter or ignition relay is located under the instrument panel. Only a qualified auto electrician can check the functionality of these units. On your own, you can simply replace the relay with a working one.
The starter’s “retractor” often jams; in this case, the spark could disappear right along the way. Experienced car enthusiasts recommend hitting the starter in the field with a key or something heavy, but just be careful with the force. If you managed to get to the garage, you can check the starter using the battery. Ideally, when you press the starter housing at the zero phase, and stretch the wire with the “crocodile” from the positive to the “retractor”, the unit should “come to life”. If nothing happens, then the problem is in the “retracting” part. If the relay is working, the problem may be in the brushes; it makes a loud noise and the starter does not turn if the bendix is faulty.
Often the spark disappears at the point of power supply to the starter. The circuit can be checked using a multimeter. In this case, you need an assistant who will turn the key at the moment when you begin to take measurements.

The spark in the VAZ-2110 often disappears for another reason - banal oxidation of the contacts. We have already mentioned cleaning them from oxidation; if servicing the ECU did not help, then you should look at other wires. For example, trace the course of a mass conductor. The most vulnerable places on it are where it contacts the body and approaches the battery terminal. If a fault is found at the terminal, replace the wire. At the point of contact with the body, it is enough to simply clean it with a metal brush.

Common mistakes during diagnostics

Most people, due to ignorance of the VAZ 2110 injector machine, make many mistakes in the process of identifying problems.

Let's look at some of them:

Many people make a common mistake: when they see that there is no spark, they want to check it for breaks. For this purpose, they place the wire close to the ground of the machine. But when performing such actions, the ignition module may break, so under no circumstances should you do this;
Another problem is checking the spark discharge. If you place spark plugs on the engine body, a large induction current may appear. This occurs even due to slight contact of the spark plug with the ground, as a result of which the controller can also be damaged. Therefore, it is necessary to use a spark gap that will not allow the distribution of ignition with the same supply of high voltage to two spark plugs at once.

How to check the operation of spark plugs under pressure

Method number 4: On the engine. At idle, disconnect the high-voltage wire from each spark plug in turn. The spark plug that affects engine performance the least is the faulty one. This method is not safe, because... there is a possibility of electric shock when the wires are disconnected. And again, not a 100% method, because... The culprit for the power unit tripping may not be the spark plug, but the elements of the ignition system (ignition module, high-voltage wire, etc.).

Method No. 5: Pressure chamber at home. Special stands for checking spark plugs that create the necessary pressure (for example, for a VAZ 2110, 10-12 atm is enough, see compression) are available at service stations. At home, you can create similar conditions using a syringe:

Or make a pressure chamber like this.

Method number 6: Replacing the spark plug. Don’t forget that you can determine if a part is faulty by replacing it with a known good one.

These are perhaps the most popular verification methods. How do you know if there is a spark? Let us remind you that the condition of the engine can be determined by the soot of the spark plugs. In addition, a weak spark can be strengthened by modifying the MH.

Hall sensor for system diagnostics

ANALOG HALL SENSOR CONVERTS THE FIELD INDUCTION INTO VOLTAGE.

And the value shown by him completely depends on the polarity of the field, as well as its strength.

If the light is on

Sometimes the injector fault light stays on until the engine warms up to 90 degrees, after which it stops flashing. This is usually observed in winter, when there is severe frost outside. And although the problem is not serious, it will have to be solved. It happens like this:

Replace the injector sensor;
Get the firmware installed at a car service center;
Remove the battery terminals. Perhaps the light came on, but never went out.
And after removal, the injector will be overloaded.

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

Source

Errors during diagnostics

Most car owners, due to ignorance of the VAZ 2112 injector structure, often make mistakes in the process of identifying problems. Let's look at some of them:

Seeing that there is no spark, the “masters” want to check it for breaks. For this purpose, they place the wire close to the ground of the machine. But when performing such actions, the ignition module may break, so under no circumstances should you do this;
Errors when checking spark discharge. If you place spark plugs on the engine body, a large induction current may appear. This occurs even due to slight contact of the spark plug with the ground, as a result of which the controller can also be damaged. Therefore, it is necessary to use a spark gap that will not allow the distribution of ignition with the same supply of high voltage to two spark plugs at once.

How to check the ignition module on a VAZ-2110 injector 16 valves

VAZ-2110 engines with a two-shaft head with 16 valves are built on the basis of the old one and a half liter VAZ 21083 engine. Changes affected only the cylinder head and air supply system. Twin-shaft 16-valve engines were installed in two types - a 1.5-liter engine (VAZ-2112) and a 1.6-liter engine (VAZ-21124). The ignition system on these engines is different. Today we will look at the ignition module for the injection 16-valve engine 2112 and find out its differences from the 1.6-liter engine 21124.

Design of the ignition module of a 16-valve engine on a VAZ-2110

Despite the similarity in engine design, the ignition system of the 1.5-liter injection 16-valve engine differs from the 1.6 16-valve engine. The 1.6 liter engine uses an electronic contactless ignition system with individual coils on each spark plug. Therefore, there was no need for an ignition module. Such a system is more reliable and cheaper to operate, since if one coil fails, there is no need to replace the entire module.

Hall sensor and system diagnostics

A Hall sensor is a device needed to measure the magnetic field, current, and resistance in conductors. Currently, there are two types of such devices: analog and digital. The latter can determine where there is and where there is no magnetic field. That is, it can be used if the spark in the VAZ-2112 car is lost. It is also used during diagnostics of the ignition systems of VAZ and other cars. The main advantage is that the sensor has a non-contact effect. Therefore, there is no likelihood that a short circuit will appear in the circuit.

An analog Hall sensor converts field induction into voltage. The magnitude it shows depends entirely on the polarity of the field, as well as its strength.

Possible causes of failure

The weak point of the ignition coils and modules is the secondary winding, which generates a high voltage pulse. A coil break or breakdown may occur in it. The following factors lead to this phenomenon:

use of low-quality or unsuitable candles;
operation with non-functioning high voltage wires;
frequent attempts to check the spark.

The high-voltage pulse arising in the secondary winding must be realized (spent). If this does not happen (if the integrity of a high voltage wire is broken, for example), a high-energy electrical pulse seeks an outlet. He will find it, with a high degree of probability, in the thin secondary winding.

Often, a module malfunction occurs when the integrity of poor-quality factory soldering of wires going to the switch elements is violated. This happens from vibration. Also, the cause of non-working coils can be a banal contact failure in the incoming connector. Another factor leading to a malfunction of the ignition unit is often moisture that gets on the device during washing or driving in unusual conditions.

Application of Hall Sensor

Engine won't start

If, during the check, you find that a spark gets to the spark plugs, but the 2112 engine still does not start, then you need to perform diagnostics.

Using the hall sensor, check for the presence of a spark in the spark plugs;
Check the spark plugs to see if they are OK. A spark gap can be used for this purpose. However, you need to remember that the controller will be broken if candles are placed on its body;
Conduct fuel pump diagnostics. When you try to start a VAZ 2112 car, a characteristic sound will appear from under the rear seat. If there is no sound, then you need to check the fuses and the main relay. In the VAZ 2112 car they are located behind the side cover of the driver's seat.

If, after diagnostics, problems were identified with one of these elements, then you can fix them yourself. Usually the spark plugs begin to work after proper wiping, although this does not always happen, so they have to be replaced.

If the light is on

Replace the injector sensor;
Get the firmware installed at a car service center;
Remove the battery terminals. Perhaps the light came on, but never went out.
And after removal, the injector will be overloaded.

None Lost spark on VAZ 2112 injector 16 valves, reasons, diagnostics Link to main publication

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Motorists often have to deal with one or another breakdown of their iron horse. One of the quite common problems is the lack of spark. Owners of both domestic cars and foreign cars have had to deal with it. Let's look at this problem in more detail using the example of one of the fairly popular Russian cars.

Stage two

You can check the element by the presence of operating sound. Turn on the ignition - there should be a hum in the area of the rear seats. Sometimes he is missing. In this case, you should check the fuses. The VAZ-2110 is an injection car, and the fuse box is located on the side of the center console on the front passenger side.

It is necessary to unscrew the fasteners, then remove the cover, check the fuses for functionality and, if necessary, replace them. If the elements are fully operational, then you need to check whether the relay will turn on, both the main one and the fuel pump. You can feel the moment of switching on with your finger. A characteristic click will also be heard.

If there is no spark on a VAZ-2110 (injector, 8 valves), then the spark plugs are often the cause. Naturally, they are checked if the fuel pump is working. It is best to use a spark gap for testing. If the current is distributed over two spark plugs, then there will definitely be a breakdown to ground.

It is possible that the wire to the ignition coil has broken or there are breaks in its winding. If a VAZ-2110 car does not have a spark (injector, 8 valves) on two wires, then the reasons may be a non-working ignition coil or controller. In two cases, there is a possibility of high-voltage wires breaking. This option is worth checking first. Look at the resistance level. Normal values are up to 200 kOhm.