Why there is no spark from the ignition coil of the VAZ 2106 and from the spark plugs: causes and solutions

No spark on spark plugs VAZ 2107

VAZ (Lada) 2107 1982 - 2013

VAZ 2107, carburetor, no spark. A spark comes from the coil to the distributor cover, the slider is new, there is a gap and a spark at the contacts, but it does not flow to the spark plugs. Armor wires are new, spark plugs too

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Apparently the lid is damaged. At least ask your neighbor for a replacement if you can’t buy one.

I can assume that you removed the distributor and installed it back incorrectly. Miracles do not happen, if the coil produces a spark, the cover and slider are new, then the spark jumps at the wrong time and strikes between the electrodes of the cover. Start again, install the crankshaft and camshaft according to the marks, install the distributor. It is possible that by this time the slider will already be broken, get ready to buy a new one.

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VAZ 2105 won't start

What spark plugs should I use for contactless ignition on a VAZ 2107?

Distributor

The VAZ-2107 uses distributor ignition. If you need to check the condition of the contacts on high-voltage wires. When the season changes, condensation forms on them. The distributor has five outputs.

Four of them go to the cylinder spark plugs, and one (central) goes to the ignition coil. A white coating often forms on the metal ends. Because of this, the slider will not be able to transmit impulses to the coil. By the way, it would be a good idea to check the ignition distributor itself. The part looks like this:

If it is burnt, the part should be replaced. The price of a new element is 150 rubles. If a spark forms on the ignition coil when starting the engine, the high-voltage wire should be replaced. It also “pushes” on candles. You can see this at night. Small blue sparkles are visible near them. In this case, the wires are replaced as a set. They are inexpensive. New elements cost about 700 rubles.

Starter does not turn

The most common reason why a VAZ 2106 refuses to start is usually related to the starter of this car. Sometimes the starter categorically refuses to rotate after turning the key in the ignition. This is why:

The battery has run out. The first thing an experienced V6 owner checks is the condition of the battery. This is very simple to do: you need to turn on the low beam headlights and see if they shine brightly. If the battery is very low, the headlights will shine very dimly or not at all. The solution is obvious: you should remove the battery from the car and charge it using a portable charger;
one of the terminals is oxidized or poorly screwed. If there is no contact at the battery terminals or this contact is very weak due to oxidation of the contacting surfaces, the starter will not rotate either. In this case, the low beam headlights can shine normally, and all the lights on the instrument panel will light up properly. But there is not enough charge to crank the starter. Solution: after each unscrewing of the terminals, they should be thoroughly cleaned with fine sandpaper, and then a thin layer of lithol should be applied to the contact surfaces. This will protect the terminals from oxidation, and problems with the starter will no longer arise;
The ignition switch is faulty. The ignition switches in the “sixes” have never been very reliable. If no problems were identified when inspecting the battery, it is likely that the cause of problems with the starter is in the ignition switch. This is easy to check: you should disconnect a couple of wires going to the ignition and short them directly. If after this the starter starts to rotate, then the source of the problem has been found. Ignition switches cannot be repaired. So the only solution is to unscrew a couple of bolts that hold this lock in place and replace it with a new one;
The solenoid relay is broken. It is not difficult to find out that the problem is in the relay. After turning the ignition key, the starter does not rotate, but the driver hears quiet, but quite distinct clicks in the cabin. The serviceability of the relay is checked as follows: there is a pair of contacts on the starter (those with nuts). These contacts should be closed with a piece of wire. If the starter then begins to rotate, the solenoid relay should be changed, since it is simply impossible to repair this part in a garage;
The brushes in the starter are worn out. The second option is also possible: the brushes are intact, but the winding on the armature is damaged (usually this occurs due to the short circuit of adjacent turns from which the insulation has fallen off). In both the first and second cases, the starter will not make any sounds or clicks. To determine that the problem is in the brushes or damaged insulation, the starter will have to be removed and disassembled. If the “diagnosis” is confirmed, you will have to go to the nearest auto parts store for a new starter. This device cannot be repaired.

Things to remember

Undoubtedly, it is the failure of the starter that is the most common breakdown that leads to the VAZ-2107 not starting. This is far from the worst problem, which, by the way, also occurs on higher-quality foreign cars.

To eliminate this malfunction, the starter should be removed, inspected for damage, and thoroughly cleaned of any deposits accumulated on it. A lubricant change will also be required.

Do not forget that overheating of the engine has a very negative effect on the performance of the car. By the way, this can happen not only on a hot day, but also in severe frost if the engine cooling system has failed. In order to make sure that the cause of the engine not working was its overheating, you should look for traces of coolant in the cabin under the floor coverings. But even if they were not there, it is necessary to disassemble the stove and see if all the pipes are in place, as well as in what condition they are. The fact is that a banal blockage of the radiator could have occurred, due to which there was a failure in the cooling system.

The intake valve is another detail that you should pay attention to if your VAZ-2107 completely refuses to start. It could burn out, and for no reason at all.

As a result, the gases emanating from the car will receive a very high temperature, due to which the engine will overheat.

Troubleshooting the ignition system

Malfunctions of the car’s ignition system are unpleasant because any of them is always accompanied by serious interruptions in the engine’s operation or its complete stop. The main sign of a malfunctioning ignition system is the complete absence or “weak” spark between the electrodes of the spark plugs. What to do if there is no spark, and where to look for it? Read about this and more in our material.

Most often, the spark disappears precisely at the moment when you need to go somewhere

In order not to push the car to the nearest car service center, it is important to understand what the operation of the ignition system depends on, then finding the missing spark will not cause any particular difficulties

At the end of this article, watch the video instructions for finding a spark in the ignition system of VAZ cars.

And below we propose to get acquainted with the algorithm for searching for a missing spark in a car’s ignition system.

Why is there no spark at the spark plugs?

There can be several reasons for the lack of spark at the spark plugs. Most often the culprits of the malfunction are:

Accumulator battery;
High voltage wires;
Ignition coil;
Distributor;
Malfunctions in the low voltage circuit.

Also, in the absence of a spark, special attention should be paid to checking the quality of contacts and electrical connections of the ignition system elements. You can check the condition of the contacts simply by rubbing them with your hand.

Carefully inspect the wires and blocks of the ignition system - if dirt, oil or water is found on them, they must be wiped with a dry cloth. After that, try starting the engine, it may start this time.

Checking the battery

A clear sign of problems with the battery is a dull and quiet horn signal. Also, if there are problems with the battery, the indicator lights on the instrument panel usually go out while the starter is rotating. In this case, the reason for the lack of a spark may be poor contact at the terminals or a low battery charge.

If the terminals are oxidized, they must be cleaned and tightened tightly. In addition, you can use graphite lubricant, which will reliably protect the contacts from oxidation in the future.
If the battery is discharged, it must be charged using a charger.

For information on how to properly charge a car battery and maintain it, read our battery charging instructions.

Checking high voltage wires

Next, it’s worth inspecting the high-voltage wires: they must have a neat, not “tattered” appearance, without insulation damage, otherwise they will have to be replaced. If the wires are ok, then you can start looking for a spark.

We recommend starting your search for a spark with the spark plug wires. To do this, you need to remove the tip of the spark plug wire from the spark plug and bring it to the “ground” (the nearest unpainted metal part of the body or engine) at a distance of 5-8 mm, after which you need to turn on the starter for a few seconds.

The rotation of the starter should be accompanied by an uninterrupted bright spark of white color with a slight blue tint. If there is no spark, you need to check the ignition coil. A violet, red or yellow spark indicates a malfunction in the ignition system.

It is also worth noting that the spark plugs themselves rarely fail all at the same time. If there is a “spark” in the spark plug wires, you can check any spark plug by unscrewing it from the cylinder head and putting the spark plug wire on it. Touch the metal part of the spark plug to the “ground” of the car, and by rotating the starter, make sure that there is a spark at the electrodes of the spark plug.

It is necessary to change spark plugs within the time limits established by the maintenance regulations for your car (usually every 15-25 thousand km).

You can learn more about the markings and heat ratings of spark plugs from our material at this link.

Introduction

Any malfunction in a car is unpleasant for any car owner. Malfunctions with the ignition system are accompanied by problems in the engine. A clear sign that there is a malfunction in the ignition system is the absence of a spark or it is too weak. This often occurs in some VAZ models: 2106, 2109, 2114, and also 2110. And this, as a rule, happens at the most inopportune moment.

Troubleshooting

Troubleshooting in the ignition system of the VAZ “Six” should be carried out using the method of elimination, checking element by element sequentially. This is worth dwelling on in more detail.

Battery check

Since when starting a car, the power source is the battery, it is by checking this device that diagnostics should begin. Malfunctions with the battery appear when you try to start the engine. At this moment, the indicator lights on the instrument panel go out. The reason could be either poor contact on the terminals themselves, or simply a weak battery charge. Therefore, the condition of the terminals should be checked and, if you need to clean them, tighten the fastening. To prevent future oxidation, it is recommended to cover the contacts with a graphite coating. If the battery is discharged, it is charged using an appropriate device.

Spark plug wires

The next elements that require mandatory checking in case of problems with sparking are explosive wires. Upon external inspection, the cables should not show any damage (cracks, breaks, etc.). To assess whether a spark passes through the wire or not, you will need to remove the tip from the spark plug and place it near a ground (5–8 mm), for example, near the engine block, and crank the starter for a few seconds.

At this time, a powerful spark should jump. The absence of one will indicate the need to check the high-voltage coil. Since it is impossible to determine by ear which of the cylinders does not spark, the test should be performed one by one with all wires.

Video: diagnostics of explosive wires with a multimeter

Spark plug

Spark plugs, although infrequently, still fail. If a malfunction occurs, it is with one element, and not with all of them at once. If a spark is present on the spark plug wires, then to check the spark plugs themselves, they are unscrewed from the cylinder head of the “six” and an explosive cable is put on. The metal body of the spark plug touches the masses and turns the starter. If the spark plug element is working, then a spark will jump between the electrodes. However, it may also be absent from a working spark plug when the electrodes are filled with fuel.

In this case, the part needs to be dried, for example, on a gas stove or installed another one. In addition, it is recommended to check the gap between the electrodes with a feeler gauge. For a contact ignition system it should be 0.5–0.6 mm, for a contactless ignition system it should be 0.7–08 mm.

To test the high-voltage coil, you need to remove the central cable from the distributor cover. By cranking the starter, we check for the presence of a spark in the same way as with the explosive wires. If there is a spark, then the coil is working and the problem should be looked for elsewhere. If there is no spark, the problem is possible both with the coil itself and with the low-voltage circuit. To diagnose the device in question, you can use a multimeter. For this:

Checking the contactless distributor

If the “six” is equipped with a contactless ignition system, then checking elements such as spark plugs, coil, and explosive wires is performed in the same way as with a contact one. The differences lie in checking the switch and the Hall sensor installed instead of the contacts.

Hall Sensor

The easiest way to diagnose a Hall sensor is to install a known working element. But since the part may not always be at hand, you have to look for other possible options.

Checking the removed sensor

During the test, the voltage at the sensor output is determined. We determine the serviceability of the element removed from the machine according to the presented diagram by applying a voltage in the range of 8–14 V.

Diagram for checking the removed Hall sensor: 1 - ignition distributor; 2 - 2 kOhm resistor; 3 - voltmeter with a scale limit of at least 15 V and an internal resistance of at least 100 kOhm; 4 - plug connector connected to the ignition distributor sensor

By placing a screwdriver in the gap of the sensor, the voltage should change within 0.3–4 V. If the distributor has been completely removed, then by turning its shaft, we measure the voltage in the same way.

Checking the sensor without removing it

The performance of the Hall sensor can be assessed without removing the part from the car, using the diagram provided.

Diagram for checking the Hall sensor on a car: 1 - ignition distributor; 2 - adapter connector with a voltmeter having a scale limit of at least 15 V and an internal resistance of at least 100 kOhm; 3 — plug connector connected to the ignition distributor sensor; 4 - car wiring harness

The essence of the test comes down to connecting a voltmeter to the corresponding contacts on the sensor connector. After this, turn on the ignition and turn the crankshaft with a special key. The presence of voltage at the output, which corresponds to the above values, will indicate the serviceability of the element.

Video: Hall sensor diagnostics

Switch

Since the formation of a spark also depends on the switch, you need to know how to check this device too.

One of the reasons for the lack of spark on the spark plugs may be a faulty switch

You can purchase a new part or perform the following sequence of actions using a control light:

Unscrew the nut and remove the brown wire from contact “K” of the coil.
We connect a light bulb to the resulting open circuit.
Turn on the ignition and crank the starter several times. If the switch is working properly, the light will light up. Otherwise, the element being diagnosed will need to be replaced.

Video: checking the ignition system switch

The performance of the systems and components of the VAZ “six” must be constantly monitored. The occurrence of problems with sparking will not go unnoticed. Troubleshooting and troubleshooting does not require special tools or skills. A minimal set consisting of keys, a screwdriver and a light bulb will be quite sufficient for diagnostics and repairs. The main thing is to know and understand how a spark is formed, and what elements of the ignition system can affect its absence or poor quality.

Lost spark on VAZ 2107, what could it be?

Hello everyone, the spark has disappeared on the VAZ 2107, what could it be?

31 comments on “The spark is missing on the VAZ 2107, what could it be”

Check the spark plugs, caps, armor wires, spool, switch and distributor cover for moisture.

Injector? Or a carburetor? What ignition? Contact? Without contact?

Pavel, what does the caps have to do with it?

Denis, they can break through, verified

Pavel, so what kind of caps?

Pavel, call the details by their proper names.

The candle doesn't work

candles from matches then it will work

stearic. just be careful!. Look at the coil, is it not a coil of wires or spark plugs?

Look at the coil, is it not a coil of wires or spark plugs?

Contacts on the distributor, coil, capacitor, distributor cover, wires

How can you not find a spark on the carburetor?

look, the contacts on the distributor were pinched and there was no rupture, so the spark plug doesn’t let go with the pliers; the pliers can be very open in the reverse order. if it doesn’t help, look at the coil, but it’s best to spend money on contactless ignition and completely forget about the loss of spark

Zhenya, I can’t find a spark on the BSZ carburetor on the 2107 coil kamutator new wire for the hall sensor new what to do

Alexey, I can’t find a spark on the BSZ carburetor on the 2107 coil kamutator new wire for the hall sensor new what to do

***Wiring for hall sensor

and what kind of spark is on the carburetor? You can also look at the ignition relay, I have it above the clutch pedal under the panel, put your hand in and the wires from the ignition switch to this relay go because of it, it may also not give a spark, I suffered with it for a long time, changed everything, but it turned out the wire was oxidized and burned out

what the hell is the spark in the carburetor, you should look for it in a diesel engine

The carbure only supplies fuel through the intake manifold and already in the combustion chamber an explosion occurs with a spark. Look how a gasoline engine works.

There is a resistor in the distributor slider, most likely it has oxidized. Clean it or replace it.

Alexey, do you generally know the electronic device on a carburetor engine and what one is on the injector?

Causes of sparking problems

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If there is no spark on the injector, and not, for example, on a carburetor or gear motor, you will have to try to identify the reasons for its loss. This is due to the fact that there are slightly more factors influencing spark formation in injection systems and they look more multifaceted. If we summarize the general list of possible causes of the problem, then it is worth highlighting the following most common ones:

The spark plug or spark plugs are flooded with fuel - there is either no spark or very weak, the spark plugs themselves are wet;
The spark plug or spark plugs are faulty - there is no spark at all, deposits on the contacts are usually black or white;
The crankshaft sensor, ignition module, ignition coil, switch or distributor is faulty - there is no spark at all, the engine shows no signs of “life”, the injector does not work correctly;
High-voltage wires have broken through or there has been a loss of contacts - one or two spark plugs do not work, the rest are fully operational;
The injector electronics (ECU or wires) are faulty - the unit does not work correctly, there is no spark at all spark plugs;
The injector nozzles are clogged - there is no spark at the spark plugs of specific cylinders, the injector is not working correctly.

Please note that for a complete and most accurate diagnosis, it is necessary to carry out several procedures at once:

Naturally, check for a spark;
Assess for the presence of the symptoms described above;
Check for relevant errors on the dashboard or on-board computer screen;
Check the potentially faulty unit (disassembly, cleaning, diagnostics with a multimeter, etc.).

No spark on VAZ 2106

Sparking is an important process that ensures the startup and stable operation of the power unit, for which the ignition system is responsible. The latter can be contact or non-contact, but the essence of its work remains the same - to ensure the formation and distribution of a spark to the desired cylinder at a certain point in time. If this does not happen, the engine may either not start at all or run intermittently. Therefore, it is worth dwelling in more detail on what kind of spark there should be and what the reasons for its absence may be.

Why do you need a spark?

Since the VAZ 2106 and other “classics” are equipped with an internal combustion engine, the operation of which is ensured by the combustion of the fuel-air mixture, a spark is required to ignite the latter. To obtain it, the car is equipped with an ignition system, in which the main elements are spark plugs, high-voltage (HV) wires, a distributor-breaker and an ignition coil. Both spark formation as a whole and the quality of the spark depend on the performance of each of them. The principle of obtaining a spark is quite simple and comes down to the following steps:

Contacts located in the distributor provide low voltage supply to the primary winding of the high-voltage coil.
When the contacts open, a high voltage is indicated at the coil output.
High-voltage voltage is supplied through the central wire to the ignition distributor, through which sparks are distributed to the cylinders.
A spark plug is installed in the cylinder head for each cylinder, to which voltage is supplied via explosive wires, as a result of which a spark is formed.
When a spark appears, the combustible mixture ignites, ensuring the operation of the engine.

What should be the spark?

Normal engine operation is possible only with a high-quality spark, which is determined by its color, which should be bright white with a blue tint. If the spark is purple, red or yellow, this indicates problems in the ignition system.

Signs of a bad spark

The spark can be either bad or completely absent. Therefore, you need to figure out what the possible symptoms are and what could be the cause of problems with sparking.

No spark

A complete lack of spark is manifested by the inability to start the engine. There can be many reasons for this phenomenon:

wet or failed spark plugs;
damaged explosive wires;
break in the coil;
problems with the distributor;
failure of the Hall sensor or switch (on a car with a contactless distributor).

Weak spark

The power of the spark also has a significant impact on the functioning of the power unit. If the spark is weak, the combustible mixture may ignite earlier or later than necessary. As a result, power decreases, fuel consumption increases, failures occur in different modes, and the engine may also misfire.

One of the reasons why the spark may be weak is the incorrect clearance of the ignition distributor contact group. For classic Zhiguli cars this parameter is 0.35–0.45 mm. A gap less than this value results in a weak spark. A higher value, at which the contacts in the distributor do not completely close, can lead to a complete absence of a spark. In addition to the contact group, other components of the ignition system should not be overlooked.

An insufficiently powerful spark is possible, for example, when spark plug wires break down, i.e., when part of the energy goes to ground. The same thing can happen with a spark plug when the insulator is pierced or a significant layer of soot forms on the electrodes, preventing the breakdown of the spark.

Spark to the wrong cylinder

Quite rarely, but it happens that there is a spark, but it is supplied to the wrong cylinder. At the same time, the engine runs unstable, troits, and shoots into the air filter. In this case, there can be no question of any normal operation of the motor. There may not be many reasons for this behavior:

the explosive wires on the distributor cap are mixed up;
the cover on the distributor is installed incorrectly;
The spark plug wires are not connected correctly to the spark plugs.

The last point, although unlikely, since the length of high-voltage cables is different, is still worth considering if problems with ignition occur. The listed reasons arise, as a rule, due to inexperience. Therefore, when repairing the ignition system, you need to be careful and connect the explosive wires in accordance with the numbering on the distributor cover.

conclusions

Identifying the malfunction and the reasons why the ignition coil does not spark depends primarily on its correct and consistent diagnosis. In addition, its long and trouble-free operation largely depends on care and maintenance. Only in this case will the car always delight you with impeccable performance, and its operation will bring only joy.

The operation of the VAZ 2106 power unit is inextricably linked with the formation of a spark, which is influenced by almost all elements of the ignition system. The appearance of malfunctions in the system is reflected in the form of problems with the engine: tripping, jerking, dips, floating speeds, etc. occur. Therefore, at the first symptoms, you need to find and eliminate the cause of the malfunction, which every Zhiguli owner can do with his own hands.

Why is there no spark at the spark plugs?

There can be several reasons for the lack of spark at the spark plugs. Most often the culprits of the malfunction are:

Accumulator battery;
High voltage wires;
Ignition coil;
Distributor;
Malfunctions in the low voltage circuit.

Checking the battery

If the terminals are oxidized, they must be cleaned and tightened tightly. In addition, you can use graphite lubricant, which will reliably protect the contacts from oxidation in the future.
If the battery is discharged, it must be charged using a charger.

The first stage is diagnostics of the VAZ-2105 starter

If the VAZ-2105 car suddenly stops starting, then you can try to find problems and failures in its functional system yourself, as they say, in a garage. The entire diagnostic process can be divided into several main stages.

The first step is to check the starter:

spins or doesn't spin;
with what intensity does it rotate?

If you didn’t pay attention at the moment when you tried to start your car, then try starting the car again and listen to the operation of the starter.

So, let's consider possible situations of development of events.

Lost spark on VAZ 2107 injector reasons

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For some reason, the consumption is less because there was a breakdown in the thermostat. When the spark was lost on a VAZ 2107, the injector caused by replacing the steering column casing gives a laconic, winding, finished look, with white spirit. Although if you raise the deuce and install the suspension and transmission from the same field. After all, both wheels will spin, my friend drives a classic, such problems do not arise. Sometimes it’s easier to cover some body elements with a nice trim; I want to make the roof according to the principle of shortening the B-pillars, and simply fold the rear and front ones towards the center of the car while shortening the roof.

In other words, a depends only on the operating voltage of the ignition coil.

Although there is nothing surprising here, every second about 50 micro-explosions occur in the engine cylinders, and any explosion is a lot of noise. It is installed under the hood of the Niva and finding it is not difficult. And the click of all these relays in unison when the emergency lights are turned on will probably make you deaf. The undeniable advantage of our covers for Lada Largus 7 seats. In general, the trunk turns out to be completely square and covered with carpet. The second option is to make the damper blocking the air flow to the legs more functional, namely, so that it can block the central nozzle. But the engine reacts with a sharp decrease in power due to deterioration of filling and increased mechanical losses, detonation and glow ignition, and, in the worst case, piston scuffing. If the device is working properly, the value should be between 0.411 volts.

Bringing the car back to life

As for why a spark disappears, everything is probably very clear. Now, it would not be amiss to consider the order of her return. The reality is that in most cases, getting the spark back is a simple matter and just involves carefully checking the broken car. To be more precise, to normalize sparking it is required:

Firstly, check the spark on the injector using the method described above, make sure that it has disappeared, and, at least indirectly, try to determine the cause of the malfunction;
Next, it is enough to assess the current circumstances and act based on them. As typical situations, we suggest considering solutions to the following problems:
the spark plug is wet (not always) and the carbon deposits are incorrect (white or black) - clean, dry the part and try to start the engine, if there is no result, change the spark plug and deal with problems in the fuel system (cleaning the injector, checking the ECU, etc.);
the spark plug is wet, there is no spark at all, the color of the soot is not important - we try to change the part, if there is no result, we check the ignition system and the operation of the injector.

In principle, in theory there are no particular difficulties in repairs of this kind. Despite this, it often causes difficulties in implementation for inexperienced motorists. To solve these, you need to act in the order described above, but if something doesn’t work out, it’s better to turn to professionals at a service station. This approach to repairs will not only save time, but also guarantee trouble-free operation of the car in the future.

Perhaps this concludes the most important information on today’s issue. We hope that the material presented was useful to you and provided answers to your questions. Good luck in operating and maintaining your car!

Checking the ignition coil for spark

To diagnose the performance of the coil, remove the wire from the distributor-breaker. Next, the test is carried out similarly to testing high-voltage wires, that is, the wire is brought to a metal surface and turned with a starter. The presence of a spark will indicate in this case a problem with the ignition distributor; if there is no spark, then the problem lies in the coil.

First you need to check the distributor contacts. These contacts may oxidize, insulation damage is also possible, and the rotor itself may be faulty. Detecting problems with the rotor allows you to eliminate the problem by replacing it. When checking the ignition coil, you should identify possible defects in the integrity of the winding, burnouts and other signs that a short circuit is occurring inside. If such signs are found, the coil should be replaced or the ignition coil should be repaired.

Let us add that the presence of a spark on the spark plugs does not mean that the car must start. This is especially true for injection engines, where the failure of certain sensors or ECUs can make it very difficult or completely impossible to start the power unit. In such cases, there is a spark, fuel is supplied, but the engine still does not start. The ignition switch also deserves special attention, since malfunctions can occur in this place.

Now let's take a closer look at ways to check the main elements of the ignition system. To do this, let's go back to the coil. As already mentioned, the most common cause of a malfunction is a damaged winding. Then an insulation breakdown occurs and a short circuit occurs

It is also important to understand that the coil can fail due to overload. Such increased loads occur as a result of problematic spark plugs or spark plug wires.

For diagnosis you should:

put the car in a dry parking, repair or other box. You can also use the garage. The main thing is that the humidity is not too high;
Next, you will need to clean the distributor cover from dirt, after which the specified cover must be removed;
then you need to turn the engine crankshaft so that the distributor contacts are closed;
Now you can turn on the ignition and bring the high-voltage wire of the distributor 3-7 mm to ground;

After assessing the spark, you can decide whether the ignition coil needs to be replaced

Please note that repairing this element is often impractical. Also, when installing a new spare part, you should strictly adhere to the required polarity

If this is not done, then the new part will quickly become unusable after unqualified installation. Please note that car service centers use a special stand to check coils. Such equipment allows you to check the coil taking into account various operating modes.

To check the spark on the spark plugs if the distributor is working properly and there are no problems with the condition of the high-voltage wires, you need to unscrew the spark plugs from the engine. In addition to the contacts, you should look at carbon deposits, the degree of oiling of the electrodes, etc. For normal sparking, contamination must be cleaned. You should also check the gap between the electrodes, which is usually between 0.7 and 0.9 mm. If the gap is broken, then you can carefully bend the side electrode. This method is a temporary measure, but in some cases it allows you to drive from several tens to hundreds of kilometers without tripping the engine in case of problems with the spark plugs.

We also add that there are special pistol devices for checking spark plugs. Typically, such solutions are available from spark plug sellers in car dealerships or automotive markets. If there is such a possibility, then the spark plugs can be checked on similar equipment.

High voltage part of the system

If the VAZ-2107 starts poorly or does not work at all, you need to check the center wire. It connects the distributor to the coil. To do this, the tip of the wire is carefully removed from the cover. Next, it is brought closer to any part that is in close contact with the mass of the machine. It does not matter whether this surface is painted or not.

Next, you need to secure the wire in such a way that there is a small space between the selected part and its tip (5-7 mm is enough). If the car has an electronic ignition, the conductor must be secured especially carefully. After all, if it falls on ground, all electronics will most likely fail.

You should also not scratch the central wire across the body. Do not hold the conductor with your hand. The electric shock will be quite strong. If there is a spark in this system, then the problem is in another system.

No spark on an injection engine or an engine with a carburetor: how to check

Checking the spark is possible using several methods: to ground, using a multimeter, or a special tester on a piezoelectric element. The first method is the simplest. The body of the unscrewed spark plug is brought to the metal (usually the engine cylinder block), after which the engine is cranked by the starter and the presence of a spark is analyzed.

Please note that this verification method cannot be used when diagnosing injection cars. The fact is that a car with an injector has an ECU and other electrical equipment that is quite sensitive and can be damaged

The second method allows you to better assess the condition of the spark plug, identify breakdown, etc. The use of a special tester is a method of checking the spark on injector cars, reminiscent in its principle of checking by analyzing the spark breakdown to ground (the first method). In this case, the risk of burning the control unit is minimized. Now let's talk about how to check the spark on a fuel-injected engine.

As mentioned above, a special spark arrester device is used to check the spark on the injector. The presence of this solution during diagnostics allows you to accurately localize the problem area, since the ignition spark may not be on the spark plug, on the distributor or on the coil. Also, there may be no spark in only one, several or all cylinders of the engine.

A complete lack of sparking indicates possible problems with the controller, ignition module, coil or center wire. Diagnostics should begin by checking the fuses. Then you should evaluate the condition of the ground contact, and also check the high-voltage wires.

If there is no spark at the ignition coil, then the functionality of the high voltage wire should be checked. The specified wire must be checked for insulation integrity, have no breakdowns, burnt areas, etc. Detection of any defects is grounds for its replacement.

Also, in the process of diagnosing the ignition system, you should inspect the spark plugs. This must be done if electricity reaches the candles. On carburetor cars, it is enough to remove the spark plug wire, and then bring it closer to a metal surface (for example, a car body) by half a centimeter. Then you need to turn the starter and make sure that there is a spark running between the wire and the metal surface. The spark itself should also have a certain intensity, be white with a slight bluish tint. If no deviations are noticed, then the spark plugs are working. The reason that there is no spark at the spark plug may be the ignition coil.

If you notice problems with the spark plugs, then you need to pay attention to the spark plug contacts. These contacts must be free of contamination

Let us add that if deviations from the norm are noticed, it is optimal to immediately replace the spark plugs. Failure to do so will indicate the need to clean the contacts.

Stage four - diagnostics of fuel supply to the engine

It is not recommended to diagnose fuel injection yourself. How to determine that it is the one that has failed? Based on the results of analyzes of the first three stages:

spark is present;
fuel is supplied.

It’s better not to deal with the injection system yourself, but to send it straight to automotive specialists at a service station. In the carburetor - you can try to find the problem yourself. As you know, the fuel system with a carburetor engine consists of the following components:

tank;
fuel pump;
pipeline;
the carburetor itself.

Therefore, it is necessary to carry out diagnostics according to the following scheme:

We check how gasoline flows through the hoses into the carburetor.
Let's inspect the air filter.
We diagnose the serviceability of the throttle valve and its correct functioning - for full and incomplete opening.
We pay attention to the starting device of the carburetor itself.
We check the fine fuel filter for contamination.

If all of the above is in perfect order, then the problem lies in the fuel pump. It will have to be replaced with a new one.

What signs indicate a malfunction of the VAZ car distributor?

1. The engine does not start: - there is no gap or too large a gap between the breaker contacts; -burnt and dirty contacts; - the capacitor has failed; - the noise suppression resistance of the “slider” has burned out; - the distributor cover is “broken”; - the low voltage wire is broken or its terminals are oxidized; -Hall sensor burnt out (non-contact ignition). 2. The engine “shakes” at idle: - the gap between the contacts is not normal; - ignition too early. 3. The engine “jerks” at high speeds: - the gap between the breaker contacts is too large; - the spring of the movable contact of the breaker has weakened; - the springs of the centrifugal regulator have weakened. 4. “Jerking”, interruptions in all engine modes: -damage to high voltage wires, oxidized or loose in the sockets; -dirty, oily, burnt breaker contacts; - the corner of the moving contact in the distributor cover is worn out or broken; -cracks and burnouts of the “runner” and the distributor cover; - the capacitor is “half broken” and needs to be replaced; - the bushings are worn out and the distributor shaft is “playing”; - the contactless ignition system switch is faulty. 5. The car accelerates slowly, consumes a lot of fuel: -the ignition timing is incorrectly set

Note! Signs of a malfunction of the VAZ-2107 distributor are very easily confused with manifestations of malfunctions in the power system. Therefore, never start disassembling the distributor and carburetor with the fuel pump at the same time!

Typical malfunctions of trimmers, how to fix them yourself

Like any technically complex device operating under extreme conditions, trimmers can fail.
The most common causes of breakdowns are violations of the rules for operating a mechanized scythe established by the manufacturer. For example, non-compliance with alternating work and technological breaks, or irregular lubrication of the gearbox and other parts, which leads to overheating of parts and mechanisms. Typical malfunctions of trimmers, most often manifested in various types of this device, are:

failure of the working head of the tool, which usually manifests itself in a violation of the line feed due to its tangling or sticking, as well as mechanical damage to the bottom of the reel;
malfunction of the brush cutter carburetor;
breakage of the intermediate shaft of the tool; the cause of this malfunction may be cutting off the splines with which it is connected to the engine shaft;
damage to the connecting sleeves of the main bearing installed between the cable and the trimmer head.
clogged fuel and air filters.

Sticking and tangling of fishing line usually occurs when its quality is poor and operating conditions are violated, which leads to overheating of the trimmer head and fishing line. To fix this problem you need to:

Remove the cover from the trimmer head by pressing the latches with your fingers and carefully unfasten the cover.
Remove the spool of fishing line from the head. It must be removed carefully so that the spring installed underneath does not jump out and fly into the grass.
Unravel the tangled or stuck line and load it again. Fold the fishing line in half, and secure the middle into a special groove on the middle disk of the reel, which divides the reel into two compartments.
Wind the fishing line simultaneously into both compartments of the reel in the direction indicated in the instructions, or on the reel itself, and secure the free ends of the fishing line in its grooves.
Reassemble the head in reverse order, carefully installing the spring.

Video: how to wind fishing line onto a trimmer head reel

For a trimmer, it is better to use a fishing line of the diameter recommended for use by the tool manufacturer. When purchasing, you should purchase cord from more well-known brands, rather than taking the first line you come across that is less expensive and of an unfamiliar brand.

If the gas trimmer does not start or its engine stalls after starting, the cause may be a malfunction of the carburetor or a clogged fuel filter. Malfunctions in the operation of the carburetor can occur when it becomes clogged and the valves of this device stick to the oil film. This can happen if the fuel-oil mixture is not fully developed and left in the tank for a long time.

To clean the carburetor, you need to remove it from the engine and disassemble it, one by one disconnecting the primer (hand pump for pumping fuel), all the gaskets and the needle. Each part should be washed individually with carburetor cleaner, blowing liquid from the bottle into all its holes. After washing, when the parts are dry, you need to assemble the carburetor and install it in place.

Video: how to clean the trimmer carburetor

A gasoline engine may stall if the fuel filter is clogged with grass and dust. It, like the air filter, must be removed from the brush cutter and washed with gasoline. After drying, the filters must be replaced.

Often, in trimmers with a curved bar, the mowing head shaft overheats or stops turning. This occurs when the main bearing is not properly lubricated or damaged. It consists of two bushings located one inside the other. This part needs to be lubricated or replaced with a new one if the bushings are broken and the shaft is jammed. To do this you need:

Remove the trimmer head.
Remove the protective casing.
Unscrew the screw securing the main bearing and remove the bushings from the rod hole.
If the bearing is not broken, you just need to lubricate it by squeezing graphite grease into the lubrication hole from a syringe tube. If necessary, if the bushings are jammed or broken, this part must be replaced.
Assembly is carried out in reverse order.

Video: how to replace the trimmer main bearing

To eliminate other trimmer malfunctions, including shaft breakage or motor failure, you will need the help of a qualified specialist, which can be provided by a specialized repair service.

Carburetor engine does not start

The list of possible reasons why the VAZ 2107 carburetor does not start looks like this:

Of course, there may be other reasons why gasoline does not get into the engine cylinders. In this case, an individual approach to solving the problem is necessary.

If gasoline enters the cylinders, but the VAZ 2107 does not start, then it is worth checking the ignition system.

Unscrew the spark plug, connect it to the high-voltage wire and attach it to the engine head, ensuring contact with ground. Have a helper watch the spark plug while you turn the starter. The spark plug should produce a stable, bluish spark. If the spark is red, the spark plug needs to be replaced.
If there is no spark, you need to check the ground cable going to the engine. It must be tight and the contact must not be oxidized or oily. You can install a temporary additional cable to ensure that the motor is in contact with ground.
If a spark does not appear, you should check the operation of the distributor. The high-voltage “central” wire should be placed at a distance of 1 mm from the engine and the starter should be rotated. There is no spark, the fault lies in the distributor. Use pliers to hold the wire, otherwise you may get an electric shock.
If there is no spark, check the distributor cover and the presence of voltage at contact “K”. The absence of voltage at the contact indicates a malfunction of the ignition switch or fuse or power cable. To check this, you can run a temporary wire from the positive terminal of the battery.
If power is supplied to the distributor, it is necessary to check the gap of the breaker contacts (0.4 mm) and the functionality of the resistor installed in the slider.
If the distributor is working properly, all that remains is to check whether the ignition is set correctly.

If the ignition is set correctly, the spark is normal and gasoline flows into the cylinders, all that remains is to check the compression. In VAZ 2107 it should be 11 or higher.