What spark plugs to put on a VAZ 2109 carburetor

Installing NGK spark plugs on a VAZ 2106

For stable operation of the power unit, it is customary to install Japanese NGK VAZ 2106 spark plugs on classic Zhiguli models, as well as high-quality products from other foreign parts of the A17 series, which, as a rule, are unreliable in operation and have a short service life. But to install imported spark plugs, you need to know which ones are suitable for the “six” in terms of parameters.

Reasons for replacing elements

The spark plug in any car must function in difficult conditions, solving the following problems:

promptly ignite the air-fuel mixture compressed in the cylinder;
provide an even and powerful spark discharge on its contacts;
sparking should not deteriorate under any engine operating mode.

For ignorant car enthusiasts, checking spark plugs comes down to a “spark” test. This gives rise to an erroneous statement: if, when connected to a source, a spark jumps between the contacts, then the element is in good working order.

But the conditions inside the combustion chamber differ from normal atmospheric ones, since there is high pressure (over 10 Bar), and instead of air there is fuel plus high temperature. Often, a spark plug that produces a reliable spark discharge in air, in the cylinder, works with misfires or does not spark at all.

The operability of the elements can only be determined on a stand with high voltage applied and pressure created in the chamber. Such a check is not available to most ordinary motorists; the only way out is to replace VAZ 2106 spark plugs on time by purchasing high-quality products from well-known manufacturers. These include famous brands NGK, Bosch, Beru and Brisk.

Russian spark plugs of the A17 series cannot boast of a long service life and fail after 15-20 thousand kilometers, as evidenced by the following signs:

And again talking about candles. Pay attention to gaps.

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New spark plugs NGK|Space| when the oil pressure light comes on. This is the result of long-term driving on bad spark plugs, when the fuel that does not burn in the cylinders flows into the crankcase and dilutes the oil, causing its pressure to drop.

Every car enthusiast should remember that if the power unit malfunctions, the first step is to unscrew the spark plugs and visually check their condition.

The color and thickness of carbon deposits on the contacts can tell a lot to an understanding motorist:

black carbon deposits on the contacts indicate that the fuel in the chamber does not burn completely, perhaps the spark plug has failed;
a white coating on the electrodes indicates a poor air-fuel mixture, the spark plug is working;
red carbon deposits indicate that the fuel contains harmful additives; the spark plug is most likely in good working order;
thick “fluffy” carbon deposits are the result of combustion of oil entering the chamber through the seals or piston group.

The normal color of electrodes is all shades of brown with a minimum thickness of plaque.

Which parts to choose?

When choosing spark plugs for a VAZ 2106 car, you must be guided by the numerical value indicated on the marking. It denotes the heat value of the element, which characterizes the candle’s ability to remove heat and self-clean from carbon deposits during operation. According to the Russian classification, elements are divided into the following groups:

Heat number from 11 to 16 are “hot” candles. They are designed for engines with low compression ratios and low power.
The same, from 17 to 19. The most widely used spark plugs, including on VAZ 2101-07 cars.
The same, from 20 to 26, “cold” spark plugs are installed on powerful engines with a high compression ratio and temperature in the combustion chamber.

If you install too “hot” or “cold” spark plugs on a VAZ 2106 car, the engine will not be able to function in normal mode with maximum efficiency. The letter indices on the marking indicate less important parameters, but they also need to be taken into account. For example, a product with the designation A17DV is suitable for engines with a carburetor and an ignition system with mechanical contacts, and A17DVRM for power units with an injector.

The trouble is that the classification of imported candles differs from Russian ones, and there is no single measurement system; each manufacturer has its own. Therefore, before you buy reliable products from the Japanese company NGK or another brand for the VAZ 2106, it is recommended to study the table.

How to choose spark plugs correctly for VAZ cars?

Since spark plugs (SPS) are consumables, every car owner is forced to change them from time to time. The normal performance of the SZ contributes to the optimal operation of the power unit, which is especially important for domestic cars. From this material you will learn how to select a spark plug for a VAZ car and what to consider when purchasing.

Selection options

To select good SZ, you must be guided by the following criteria:

The first parameter to consider when purchasing is the heat rating. It should be noted that this parameter is conditional and not universal, so it must be selected in accordance with the model of a particular motor. This number shows the pressure level in the internal combustion engine cylinder at which glow ignition occurs. The use of SZ with a higher heat number is allowed, but is not prohibited if it is lower.
Another parameter is the possibility of self-cleaning. Unfortunately, this parameter can only be accurately verified in practice, since all SZ manufacturers promise consumers a high level of self-cleaning. If this indicator is really high, then carbon deposits will not form on the SZ, which is especially important for their optimal operation.
When buying spark plugs from a VAZ, you also need to take into account their gap. Each manufacturer sets the appropriate gap for individual product lines. If we are talking about domestically produced cars, then in this case this gap on the VAZ spark plugs should be 0.5-0.7 mm.
Traditional SZ are equipped with two electrodes - one central and one side, but not so long ago global manufacturers began producing devices with 3 and 4 electrodes. These electrodes cannot produce multiple sparks - their purpose is to provide more consistent sparking. Accordingly, the use of such SZ contributes to more stable operation of the power unit due to improved ignition procedures.
Before purchasing SZ, carefully inspect them for mechanical damage. If you see that there are cracks on the device’s body, then it is better to refuse to purchase such SZ. Also, before installation, check that the gap is the correct size.
To diagnose purchased SZ, you can install them in a pressure chamber, of course, if you have such an opportunity, then adjust the pressure in it to about 10 kg/cm2, and the current should be connected with a value of 22 kV. As a result, a spark should begin to form. If the spark appears intermittently, this indicates that the SZ is not working, but if the sparking is continuous, then the devices can be purchased (the author of the video is Nail Poroshin).

TOP best manufacturers of spark plugs for VAZ

So which SZ for VAZ is better to choose?

Below is a list of the most popular device manufacturers:

ZAZS. VAZ vehicles are equipped with such SZ during production. The manufacturer recommends using ZAZS, citing the fact that these spark plugs are most optimal for domestic engines. However, many car enthusiasts do not trust this manufacturer and install SZ from other brands on their cars.
Beru. In particular, we are talking about the 14FR-7DU model. The main feature of such SZ is the use of a copper central electrode in the design, which has a nickel shell. Thanks to this, the SZ of this model is more resistant to corrosion and wear. The skirt is made in a conical shape, thanks to which the device quickly switches to self-cleaning mode. In addition, the spark power in these fire protection systems is quite high; accordingly, the combustible mixture will burn most efficiently.
Champion, namely the RC9YC model. If you believe the manufacturer, then such SZ have lower performance in terms of gasoline consumption. In addition, they are more stable, and their power when operating at higher engine speeds is higher.
NGK is one of the brands that supplies the highest quality products to the domestic market. The nickel model BCPR6ES-11 is currently considered one of the most affordable options. A power unit with such devices will operate more steadily. And when the driver presses the gas pedal, the engine can operate 4% more powerful than with traditional SZ. Separately, we should highlight the iridium spark plugs on the VAZ. If you decide to purchase iridium spark plugs at VAZ, you will be faced with a large assortment of models. They differ from each other both in cost and in characteristics. It should be noted that iridium spark plugs on VAZ have a longer service life. Depending on the model, iridium spark plugs on a VAZ can last up to 100 thousand kilometers or even more. Of course, such advantages also affect the cost of SZ as a whole. Iridium spark plugs on VAZ have an iridium electrode, which makes the spark even more powerful.
Denso Q20TT. Such devices have a thinner electrode, for the manufacture of which precious metals are not used. Accordingly, this has a positive effect on the price of SZ. As practice shows, when using such devices, the engine power will be higher, its dynamics will increase, and fuel consumption can be reduced. Of course, we are talking about a normally running engine.
Czech-made devices Brisk DR15YC are equipped with a copper core, as well as a longer electrode insulator, thanks to which the SZ can more quickly switch to self-cleaning mode. Accordingly, the use of these models is more relevant for vehicles that are used in urban environments. As for the replacement interval, in this case it largely depends on the quality of the fuel.
Bosch FR7DCU. Such SZ are equipped with a copper core mounted to a chromium-nickel shell. Accordingly, this enables the electrode to be more resistant to erosion or corrosion. Thanks to the use of nickel plating, the likelihood of thread sticking is minimized.
Finwhale F516. The body of this model is characterized by galvanic coating and is made of ductile steel. In addition, this model has good electrical insulation, as a result of which heat conductivity will be higher, which is ensured by the high content of aluminum oxide on the insulator.

LADA spark plugs: top 10 options

The rating contains 10 modifications of spark plugs, without division into specific car models.

10th place: ZZ A17 DVRM

The list of the best offers opens with an effective model that is in demand among a large number of buyers. Such prevalence is ensured by the stable quality of products. In the original packaging it is impossible to find a defective part or a spark plug with a broken gap. A significant advantage of the products is the ability to work actively even when the voltage drops to 6V in the on-board network. Similar spark plugs in the VAZ 2107 are often found due to their moderate cost.

The indicators are overshadowed by bad statistics - as of 2020, 35% of the kits on the market are fakes, which forces motorists to carefully select products in stores.

reasonable price;
durable;
simple design.

9th place: TZ 17 DVRM

The next representative of the rating implies the presence of as many as three electrodes on the working part of the device. A large number of motorists install such spark plugs on a VAZ carburetor or even an injection type. Thanks to the use of advanced developments in design, the manufacturer has increased the service life of the electrode.

Pirate copies also play a role here - there are a large number of them, which makes buyers cautious about purchasing products.

good performance;
long period of operation;
wide use.

Setting the correct spark plug gap in a VAZ 2109

One of the most common problems with the appearance of black carbon deposits on the spark plugs of VAZ 2109 and VAZ 21099 cars is the incorrect gap between the SZ electrodes.

Today, many spark plug manufacturers claim that there is no need to adjust the gaps, but in fact, every car owner should know how to fix this problem and check and adjust the spark plugs themselves.

Checking and installing spark plug gaps in VAZ 2109 – 21099

Almost all spark plugs produced today have a factory-set gap between the electrodes. It is different for each manufacturer. It is also different for spark plugs for carburetor engines with contact and non-contact ignition systems, and for spark plugs for injection engines.

For example, the gaps between the electrodes of spark plugs for VAZ 2109 carburetor engines vary between 0.5-0.7 mm for a contact ignition system, 0.7-0.9 mm for a non-contact ignition system.

Moreover, it is recommended to make the gap smaller by 1 mm in winter, and larger by 1 mm in summer. In this way, improved engine starting and stability of its operation at different atmospheric temperatures are achieved.

It is believed that prolonged cranking of the engine with the starter at low ambient temperatures can discharge even a new battery so much that its voltage is not enough to form a spark if the gap between the electrodes is too large or normal. At the same time, increasing the gap creates additional load on the ignition coil.

For VAZ 2109 injection engines, the gap is in the range of 0.9-1.1 mm. There are no recommendations for changing the gap size for different seasons.

Spark plugs for VAZ 2106, 2107, 2108 and 2109 – which ones to install?

The technical characteristics of spark plugs for engines of cars 2106/2107/2108/2109 differed from the fuel supply system to the combustion chamber. On VAZ 2106 and 2107 with carburetors and a contact ignition system, spark plugs with article number 21010-3707010-86 are provided from the factory. For carburetor 2106/2107/2108/2109 but with contactless ignition, spark plugs with article numbers 2108-3707010-86 or 21080-3707010-86 were installed. But in fact it is the same spare part. They are interchangeable. But on injection cars of this series, the spark plugs were somewhat different.

With injection engines on VAZ 2107, 2108 and 2109, spark plugs with article numbers 21110-3707010-86, 21110-3707010-00 or 2111-3707010 were installed. The main difference between spark plugs on injection and carburetor engines is the gap size. Otherwise, all these are ordinary nickel single-pin spark plugs with a heat rating of 17 and a tightening torque of 22 Nm.

Read more about the sizes of original spark plugs in the table.

vendor code	Engine	Thread / thread length, mm	Key size	Gap, mm	Heat number*	Center electrode material
21110-3707010-86, 21110-3707010-00, 2111-3707010	Injection 1.5, 1.6, 1.7	M14×1.25 / 19	21	1	17	Nickel
21010-3707010-86, 2108-3707010-86, 21080-3707010-86	Carburetor 1.1, 1.3, 1.5, 1.6	M14×1.25 / 19	16	0.7	17	Nickel

Checking the gap between the spark plug electrodes

When installing new spark plugs on an engine or checking old ones, it is necessary to measure the gap between their electrodes. Old spark plugs should be cleaned of carbon deposits. The check is carried out with a round probe of the required diameter.

When checking and replacing spark plugs, be careful - if the engine is hot, you can get burned.

Measuring with a flat probe will be inaccurate, since there is almost always a small indentation on the side electrode of the spark plug due to metal transfer to the central electrode. This is especially true for candles that have already worked for some time.

Notes and additions

— For spark plugs for carburetor engines with a contact ignition system for VAZ 2101, 2102, 2103, 2104, 2105, 2106, 2107 cars, the recommended gap between the electrodes of the spark plugs is 0.5-0.7 mm, for VAZ 2108, 2109, 21099, 2105, 2107 with a contactless ignition system 0.7-0.9 mm.

For injection engines of VAZ 2107, 2108, 2109, 21099 cars 1.0-1.1 mm.

An incorrectly set gap between the electrodes of the spark plugs leads to problems with starting the engine, unstable engine idle speed, jerking when starting and driving, “dips,” loss of power and throttle response, and an increase in the engine’s fuel appetite. Normal engine operation can only be ensured by a spark plug with a gap specific for a given engine type.

Regularly check the reliability of the connections of the high-voltage wires with the spark plugs, coil and ignition distributor.

With a smaller gap, the spark will be short and weak, combustion of the fuel mixture worsens, with a large gap, the voltage required to break through the air gap between the electrodes of the spark plug increases. In this case, there may be no spark at all.

There is no need to set the gap on multi-electrode spark plugs.

Applicability of spark plugs on VAZ cars: 8 comments

Hello. On VAZ 21093 with a contactless ignition system, A17DVR or their analogues from different manufacturers are installed. The resistance of the spark plug noise suppression resistor is 5 kOhm. The resistance of high-voltage wires for VAZ 21093 is 3.5 - 10 kOhm. The resistance in the wire may increase if its central core is damaged. For the engine 21083 of the VAZ 21093, it is best to install high-quality high-voltage wires that are intended specifically for it, not zero.

Hello. Question: VAZ-21093 carb. Which spark plugs are better to install A17DV with or without a resistor? And regarding high-voltage wires and spark plugs, there is also a question: what is the maximum allowable resistance of the resistor in the spark plug, since over time it can also increase the resistance of high-voltage wires. And does it make sense to install wires of zero resistance (as they used to be on cars, just a copper wire)?

This manufacturer believes that this is acceptable. IW20TT, W20TT, W20EPR-U - spark plugs that they offer for VAZ classics in addition to those indicated in the article. Here is their catalog page: https://www.denso-am.ru/elektronnyi-katalog/

They misled me or I didn’t even understand, in one article it says spark plugs for classic carburetors, Denso spark plugs with a heat number of 20, does it say that for classics this number is 17 or is this acceptable? Can you explain please

Checking and replacing spark plugs VAZ-2109

You will need: a spark plug wrench, a round dipstick.

Replacement frequency: After 30,000 km.

Before starting work:

Disconnect the wire from the “─” terminal of the battery.

Spark plug type: A17DVR, A17DVRM, FE65PR, FE65CPR. Until 1988, spark plugs of types A17DV and FE65P were installed on the VAZ-2109.

We recommend replacing spark plugs every 30,000 km, even if they are still in working order: old spark plugs can increase fuel consumption.

Spark plugs for VAZ (Lada) 2108/2109

for repair of VAZ (Lada) 2108/2109

Vectra
Mokka
Antara
Astra
SPORTS TOURER
Meriva
Zafira Tourer

Fuel consumption:

I was looking for inexpensive and high-quality candles, took Brisk and did not regret it. I drove them for five years, they would still be similar, but I decided to play it safe and change them. Throughout the entire period, the spark plugs worked smoothly without problems, and most importantly, they did not lose their properties if they were unsuccessfully refueled with low-quality gasoline, which is important in our country.

I noticed a long time ago that the car started to twitch when accelerating... I immediately decided to look at the spark plugs and saw spark plugs from 4 different companies (how is that even possible)... I bought Brisk spark plugs and was pleased with the result, the car picks up speed very well. These candles are cheap, so there is no point in buying expensive candles. Issue price: 190 ₽.

My car is a VAZ 2109, I decided to change the spark plugs to original ones from Lada Detail. The packaging says that they were made in Russia, not China. So far I can’t say anything specific about their service life, but since the replacement I have driven about 14 thousand km. I recently took it out, inspected it, it looks like new and the engine starts perfectly in any weather.

Durability:

I have a very bad opinion about the NGK - it didn’t even last 20k, the engine was throttling, and only at speed, and I dug through everything until I figured out this vile spark plug.

Durability:

About a month ago I changed my old spark plugs, which glowed like a halo and spark plugs for cylinders 3-4 were “made to ground”, but were previously installed by Bosch Group. They only lasted 2.5 months, with a mileage of somewhere around 3 thousand km.

There were some super-cheap spark plugs when there was still a carb car, perhaps A17dvr, I wasn’t the one who bought it, I know they were definitely cheap. Well, I installed NGK, honestly there is no difference at all, in winter when it was cold I constantly changed them because it was flooded, both on NGK and on cheap ones started the same.

One hell of a carburetor, they clog up all the time.

Never had any problems with the Champion N9YC.

This spring I installed BOSCH spark plugs, I liked them better, the car ran smoother and smoother, at first I thought it was a subconscious effect, but no, the mileage on them is already normal and still good.

Step-by-step instructions for replacing spark plugs in a VAZ 2109 with your own hands.

When removing the tip from the spark plug, do not pull on the wire. If you need to remove all the lugs, first mark the high-voltage wires.
Clean the spark plug niches from dirt.
Unscrew the spark plug with a special wrench. Carefully unscrew the spark plug with a special wrench. If the spark plug is hard to unscrew due to carbon deposits, drop WD-40 or Unisma into the threaded hole to avoid damaging the thread.
Examine the candle. If there are cracks on the insulator, the threads or electrodes are damaged, the spark plug must be replaced.
Light brown carbon deposits, which evenly cover the lower part of the spark plug with a thin layer, do not affect the operation of the ignition system and do not need to be cleaned.
Lack of carbon deposits on the spark plug 6. The absence of carbon deposits on the spark plug indicates either that the engine is running on a lean mixture, or that the ignition timing is incorrectly set, or that the spark plug brand does not match the engine type.
Shiny black deposits Shiny black deposits, indicating that oil has entered the engine cylinder, must be cleaned off.
Check the gap between spark plug electrodes 8. Check the gap between spark plug electrodes (round feeler gauge only). The gap should be 0.7-0.8 mm. Check the gap only with a round feeler gauge.
Adjust the spark plug gap If the gap differs from the specified one, adjust it by bending the side electrode.

During operation, there are cases of damage to the thread of the spark plug hole in the cylinder head. In this case, you need to remove the cylinder head and make a fitting or insert in a turning workshop. If this happened on the road, then you can use “Cold Welding” as a temporary measure.

Unscrew the spark plugs

Replacing spark plugs on a VAZ 2109 will only require a spark plug wrench; if you don’t have one, a deep socket head “21” will do, follow these steps:

First, carefully remove the high voltage wires from the spark plugs and place them on the cylinder head
It is necessary to remove high voltage wires by holding the protective cap with your fingers.
You cannot pull on the wire, as you can break the contact between the wire and the cap, after which you will have to buy and replace the armor wires (they are not sold individually)
The price of the issue will increase, you understand

Remove the armor wire by holding the cap with your fingers

After removing the wires, it is simply necessary to mechanically (with an iron brush) clean carbon deposits and accumulated dirt from the sockets in which the spark plugs are screwed in
This is done so that when replacing spark plugs on a VAZ 2109, debris formed around does not get into the combustion chambers
Trying to wash off this dirt is a pointless and stupid waste of time, since it will still end up inside the engine, and as a result can cause damage to the car’s piston group
The next step is to unscrew the spark plugs using a spark plug wrench or a “21” socket, as in the photo

We unscrew the spark plug with the “21” head

We unscrew the spark plugs with the engine stopped and, of course, cooled down; if you do not follow this rule, you can burn your hands and damage the spark plug threads
Even when the spark plug is “torn off” from a dead point and continues to unscrew tightly, there is no need to rush, you need to make a couple of turns in the opposite direction and again try to unscrew it carefully
This must be done to avoid damaging the threads in the block head.
When the spark plug is difficult to unscrew, it may be because a large amount of soot has built up on its walls or rod

checking and replacing spark plugs on a VAZ 2108, VAZ 2109, VAZ 21099

On a VAZ 2108, VAZ 2109, VAZ 21099 car, the following spark plugs should be used: - for VAZ 21083-80, VAZ 2110 engines - A17DVRM, FE65CPR; - for engines VAZ 2111-16, VAZ 2111-00 - A17DVRM, AS. R42ХLS; To check and replace spark plugs on a VAZ 2108, VAZ 2109, VAZ 21099 car, do the following: 1. Disconnect the wire from the “-” terminal of the battery.

2. Remove the high voltage wire ends from the spark plugs. Clean the spark plug and the area around the spark plug from dirt so that when turning the plug out, no dirt gets into the cylinder.

3. Remove the spark plugs from the cylinder head. 4. Inspect the spark plugs. If the insulators have cracks, threads or electrodes are damaged, the spark plugs must be replaced. Light brown carbon deposits, which evenly cover the bottom of the spark plug with a thin layer, do not affect the operation of the ignition system, and the carbon deposits do not need to be cleaned off. The absence of carbon deposits on the spark plug indicates either that the engine is running on a lean mixture, or that the ignition timing is incorrectly set, or that the spark plug brand does not match the engine type. A shiny black deposit on the spark plug indicates oil has entered the engine cylinder. Such a candle must be cleaned. NOTE Checking the condition of the spark plugs and the engine itself based on the condition of the spark plugs is described in more detail in Section. 3 “Faults along the way”, subsection. “Diagnostics of engine condition by the appearance of spark plugs.”

5. Check the gap between the spark plug electrodes (with a round feeler gauge only). For VAZ 2108, VAZ 2109, VAZ 21099 cars with a carburetor engine, the spark plug gap should be 0.7-0.85 mm, and for VAZ 2108, VAZ 2109, VAZ 21099 cars with an injection engine, the spark plug gap should be -1.00 -1.13 mm.

6. If the spark plug gap is different from the specified gap, adjust the gap by bending the side electrode of the spark plug. 7. When installing spark plugs on a VAZ 2108, VAZ 2109, VAZ 21099 car, first wrap the spark plugs by hand and then tighten them with a wrench. Do not exceed the tightening torque specified in Appendix 1.

USEFUL ADVICE Gone are the days when the question “Which spark plugs should I buy?”
was not relevant, and it was possible to purchase only domestic spark plugs and only the same model as on the car. Now on store shelves there is a huge selection of spark plugs from almost all foreign manufacturers. And naturally, the “self-finders” immediately began to counterfeit spark plugs. To avoid buying such candles, first of all pay attention to the packaging - the quality of printing from real manufacturers is impeccable, while the contours of the drawings in counterfeit ones often do not match. If there is no packaging at all, further inspection of the spark plugs makes no sense - there are no branded spark plugs without packaging. Next, inspect the spark plugs. The center electrode of the spark plug must have a clear cylindrical shape, and the surface of the spark plug electrode must be completely smooth. If there are defects on the spark plug electrode, and even more so, the electrode itself is installed crookedly, then you have a fake. The side electrode of a fake spark plug is often also welded crookedly, and its edges are oblique. For branded candles, the threads are made by knurling, so they are absolutely smooth. For fake ones, it is cut and has small chips. The o-ring of a real spark plug cannot be removed. On a fake one, the o-ring is either screwed into a thread or easily removed. The insulator of a real spark plug is absolutely smooth and shiny. A fake one often shows longitudinal seams from an imprecisely joined mold. And the inscription on the insulator must be clear, even and neat. And lastly, real branded spark plugs don't come cheap. Too low a price should alert you. Sometimes, during intense acceleration of a car with the engine “spinning up” almost to maximum speed, sharp jerks appear, perceived as blows. The spark plugs are to blame, although checking with a piezo tester (“pistol”) indicates their serviceability. The reason is that spark plugs lose their tightness over time, so a plug that works normally at low and medium loads misfires at high pressure in the combustion chambers. Therefore, it is not recommended to use spark plugs on a VAZ 2108, VAZ 2109, VAZ 21099 car without replacement for more than 15 thousand km.

Which spark plugs for VAZ are better to choose?

There are a large number of different modifications of the part, which complicates life for motorists. The problem is that each motor is designed for a specific type of spark plug. If you supply the wrong part, a number of negative consequences can arise.

Misfire of the mixture due to the gap between the electrodes of the element being too wide.
Interruptions in the operation of the internal combustion engine caused by too low spark power.
Instant failure of the device due to too much electrode protrusion.

Also, depending on the inconsistencies present, other malfunctions may “pop up” that reduce the comfort of using the car.

What to look for when choosing.

Specialists from the AvtoVAZ plant recommend selecting spark plugs according to a number of parameters.

Heat number. The parameter characterizes the rate of heat removal from the working part of the candle. At the same time, the electrode transfers excess heat to the spark plug skirt in a timely manner, which ensures stable operation of the part. If energy is removed too quickly, scale forms on the working part of the part, which prevents normal spark breakdown. If the withdrawal is too slow, the thin electrode overheats. The process provokes the formation of glow ignition. This prevents the engine from operating normally due to detonation of the mixture or its early ignition. Under normal thermal conditions, a spark adequately breaks through the spark plugs and does not form excessive carbon deposits.
Spark gap. Some users know that for the engine to operate correctly, the spark gap on the spark plugs must be maintained. The working gap on VAZ spark plugs is strictly set by the manufacturer of the power plant and is necessary due to the fact that the formed electric arc has a certain strength. As the distance increases, the spark loses stability, which can lead to misfires. In the opposite case, easier starting of the engine is ensured, but when the gas is released, the electric arc current may not be enough. This is justified by the fact that each ignition coil has a certain transformation ratio, usually equal to 2000 units. This means that during the start-up of the internal combustion engine, the elements produce up to 14 kW, and during normal operation it is already 24. Consequently, failure to comply with this parameter can lead to serious disruptions in the operation of the motor.
Departure of the working part of the electrodes. The parameter is critical for adequate operation of the power plant. The spark plugs on the VAZ 8-valve injector, as well as for carburetor models, have electrodes strongly pushed forward. This is due to the fact that the structural parts are located in the corner of the combustion chamber, where there is no adequate ventilation. The overhang of the working part allows for better ignition of the mixture and stabilizes engine operation. If the spark plugs are mounted in a multi-valve engine, where the inserts are located in the center of the valve head, it is recommended to install spark plugs with a deep-set core - this will prevent damage to the electrodes by the piston bottom and an abundance of carbon deposits on the structural elements.
Number of electrodes. Initially, manufacturers position this parameter as a definite plus. When one electrode “burns out,” the spark plug switches to another, which significantly increases its service life. However, not everything is as simple as it seems at first glance. If the mixture is sprayed unevenly in the cylinder (poor ventilation of the combustion chamber), and at this moment the spark jumps to the shadowed part (the place where the exhaust remains), misfire may occur, which will lead to unstable operation of the power plant. Additionally, this fact increases the wear of the catalyst and engine oil, which is critical for VAZ cars.
Manufacturer. The manufacturer of the product is also an important parameter. Users recommend buying from trusted brands that have been on the market for a long time. The cost of such candles will be significant, but with proper selection and operation they will work for a long time and without significant complaints.

By adhering to the specified parameters, a car enthusiast can buy a fairly high-quality product, while saving on the frequency of car servicing and repairs.

What spark plugs should I put on a VAZ 2109 carburetor?

I decided to change the spark plugs on the car. The choice fell on NGK V - line

I don’t know why, but when someone talks about candles, this is the name that comes to mind in my head) That’s why when I decided to change it, I immediately started asking about them. These candles are installed by many, proven ones. So I decided to install them for myself. Before this, the candles were installed BRISK

Quite good spark plugs. The car drove well. I don’t know how long it lasted. But the mileage is a bit much.
20 thousand
I think for sure) In the mornings it started to run rough. Especially at idle. Sometimes when you let off the gas it either started to work poorly or just stalled. I wasn’t very happy with it. It wasn’t very pleasant. As soon as I changed the spark plugs the car seemed to come to life) I’ve been driving for 2 days, but I don’t think about this problem anymore. I think the overclocking has become even better. It starts at the drop of a hat. They don’t give a damn when it’s warm or when it’s hot! It idles perfectly and the dip has disappeared. I still couldn’t get rid of it, but it turns out it’s the spark plugs) Below I copied the text from the topic about these candles. Read it, it might be useful. NGK NGK spark plugs can be easily distinguished from counterfeits by the direction of the electrode. In branded spark plugs from this manufacturer, the electrode is strictly perpendicular to the contact and has an even rod-like appearance; counterfeit spark plugs are distinguished by the uneven thickness of the electrode rod, as well as the curvature of its direction relative to the contact.

Differences between a fake candle and a real one: - Price. Too low a price should be alarming. — Printing quality. Real NGK has impeccable quality of inscriptions and drawings on the packaging (above). The fake one (below) has noticeable errors (the contours of the patterns of different colors are shifted relative to each other). As a result of improper assembly of the sides of the box, inscriptions and drawings may not be centered on the edges. — Central electrode. Take a closer look at it. If it does not have a clear cylindrical shape, is installed crookedly, or has minor defects, it is a fake. — Side electrode. Look at the candle from the side. A real spark plug's electrode is straight, but a fake spark plug's electrode is often crooked or has an oblique edge. — Party code. A real candle has a code on one of the faces of the hexagon indicating the party. The fake one does not have such a mark. - Carving. On a real candle, the thread is knurled, so it has an ideal surface. The fake candle has small chips visible on the edges of the thread. - Sealing ring. It is impossible to remove it on a real candle, but on a fake one you can twist it or even just remove it. — Isolator. For a real candle, the insulator is smooth (as if covered with glaze), but for a fake one it may be rough. A fake spark plug also often shows longitudinal protrusions remaining on the insulator after it is molded due to inaccurate joining of the mold halves. — The inscription on the insulator. For a real candle, it is smooth and neat. I bought it, came home and looked at it, it doesn’t look like a fake (probably a very high quality fake). Let's see how they turn out in practice)))

NGK spark plugs are currently one of the most common. They have mostly good reviews about their work on VAZ engines in recent years. There are standard NGK spark plugs, plugs with a V-shaped center electrode, plugs with a thin, high-strength iridium center electrode, plugs with a platinum center electrode, and plugs with multiple ground electrodes. Some types of NGK spark plugs are suitable for carburetor and injection engines of VAZ 2108, 2109, 21099 cars.

First, we will select NGK spark plugs for carburetor 8-valve engines of VAZ 2108, 2109, 21099 cars with a contactless ignition system. These are the following models:

VAZ 2108, 2109, 21099 with a 1.1 liter carburetor engine (53 hp);

VAZ 2108, 2109, 21099 with a 1.3 liter carburetor engine (63 hp);

VAZ 2108, 2109, 21099 with a 1.5 liter carburetor engine (72 hp).

Let's see what general requirements apply to spark plugs for the engines of these cars.

Why is it important to inspect candles?

By the appearance of the spark plugs, you can identify problems with the engine, so replacing spark plugs on a VAZ 2109 should be accompanied by a careful inspection of each of them:

When the engine is running perfectly, the spark plug's central electrode skirt is light brown in color, and deposits and carbon deposits are minimal. With complete absence of traces of oil. Then the owner of such a motor can only envy. And there is something to envy - economical fuel consumption and no need to add oil between changes
In an engine with increased fuel consumption, the central electrode becomes covered with velvety black soot. This happens for several reasons: a very rich air-fuel mixture (due to incorrect carburetor adjustment or injector malfunction) or a clogged air filter
If the engine has an excessively lean air-fuel mixture, then the color of the spark plug electrode will be light gray or pure white. This is where there is cause for concern. When driving on a lean mixture with increased loads, significant overheating of both the spark plug and the combustion chamber itself can occur, and this is a direct road to burnout of the exhaust valves
A reddish coating, comparable in color to the color of a brick, is caused by the engine running on fuel that contains a huge amount of additives with metal in its composition. Continued use of such fuel will lead to the appearance of metal deposits that form a conductive deposit on the surface of the spark plug insulation; current will pass through this deposit, but not between the electrodes, and the spark plug will naturally stop working
When a spark plug has clearly defined traces of oil, especially noticeable in the threaded part, an engine that has such spark plugs after a long period of parking tends to “trouble” after starting, but as the engine warms up, the operation stabilizes. The reason for this phenomenon is the unsatisfactory condition of the valve stem seals. In addition, increased engine oil consumption. Immediately after starting the engine, characteristic white and blue exhausts from the pipe are observed.
When the central electrode, as well as its skirt, are covered with a thick layer of oil mixed with drops of fuel and tiny particles of chips from the destruction that occurs in this cylinder, it means that the cylinder does not work at all. The reason is simple - either the destruction of the valve, or the breakdown of the partitions located between the piston rings, as well as the ingress of small metal particles between the seat and the valve. In this case, the engine usually “trips” without ceasing, and a significant loss of power is noticeable, and gasoline consumption doubles. The only way out is a major overhaul.
If there is complete destruction of the electrode along with the ceramic skirt, the cause, as a rule, is the following factors: either prolonged operation of the engine with detonation, which means the use of the wrong brand of gasoline with a low octane number, or the ignition is set very early, but it may also be defective candle. Here, “triple” of the engine is observed, as in the case described above. In this case, the only hope is that the remains of the electrode slipped into the exhaust pipe and did not get stuck under the exhaust valve. Otherwise, you will inevitably have to repair the cylinder head.
If the spark plug electrode is overgrown with ash deposits, then the color does not play any role; this indicates normal operation of the fuel system. And the reason for such a build-up is oil getting into the cylinder due to the presence of rings or wear of the piston. Increased consumption of a lot of oil and when you press the gas pedal, you get strong, blue smoke from the exhaust pipe

Screw in new spark plugs

So, the candle is unscrewed, and we can screw in a new, pre-purchased candle with our own hands:

We install and tighten it with our hands until our fingers begin to slip, and then, armed with a spark plug wrench, we perform a complete tightening
You must be vigilant and careful not to break the thread
Damaged head threads due to over-tightening threaten big problems with subsequent replacement of spark plugs
Our instruction has reached its final stage
After screwing in the new spark plugs, you can put the armor wires in place,
After this, the engine should start immediately, its operation should be smooth and stable.

Choose your candles wisely

Replacing the VAZ 2109 spark plugs is complete, all that remains is to learn how to choose replacement spark plugs correctly:

To avoid falling for a fake, pay attention to the quality of their packaging - branded candles have perfect packaging, but fake ones may have blurred outlines
If there is no packaging, this is definitely a fake; branded candles do not exist without branded packaging.
Inspect the electrodes of the spark plugs, the central electrode should be of the correct cylindrical shape and have a perfectly smooth surface
Defects in the electrodes mean only one thing - it's a fake.
Often a fake is revealed by a crooked or beveled side electrode
The thread of a good brand of candles should be perfectly smooth; nicks or small chips indicate a fake
If the insulator is not perfectly smooth, the spark plug is definitely fake; the longitudinal seams give it away
An illegible or blurry inscription on the insulator also means a fake; branded candles have perfect inscription
A low price is also always alarming; no one will sell branded candles for cheap
Pay attention to the sealing ring, it is impossible to remove it from a branded spark plug, but from a fake it can be easily removed or screwed together along the thread

Now you know everything about candles, if you think not everything, watch the video.

Selection options

To select good SZ, you must be guided by the following criteria:

The first parameter to consider when purchasing is the heat rating. It should be noted that this parameter is conditional and not universal, so it must be selected in accordance with the model of a particular motor. This number shows the pressure level in the internal combustion engine cylinder at which glow ignition occurs. The use of SZ with a higher heat number is allowed, but is not prohibited if it is lower.
Another parameter is the possibility of self-cleaning. Unfortunately, this parameter can only be accurately verified in practice, since all SZ manufacturers promise consumers a high level of self-cleaning. If this indicator is really high, then carbon deposits will not form on the SZ, which is especially important for their optimal operation.
When buying spark plugs from a VAZ, you also need to take into account their gap. Each manufacturer sets the appropriate gap for individual product lines. If we are talking about domestically produced cars, then in this case this gap on the VAZ spark plugs should be 0.5-0.7 mm.
Traditional SZ are equipped with two electrodes - one central and one side, but not so long ago global manufacturers began producing devices with 3 and 4 electrodes. These electrodes cannot produce multiple sparks - their purpose is to provide more consistent sparking. Accordingly, the use of such SZ contributes to more stable operation of the power unit due to improved ignition procedures.
Before purchasing SZ, carefully inspect them for mechanical damage. If you see that there are cracks on the device’s body, then it is better to refuse to purchase such SZ. Also, before installation, check that the gap is the correct size.
To diagnose purchased SZ, you can install them in a pressure chamber, of course, if you have such an opportunity, then adjust the pressure in it to about 10 kg/cm2, and the current should be connected with a value of 22 kV. As a result, a spark should begin to form. If the spark appears intermittently, this indicates that the SZ is not working, but if the sparking is continuous, then the devices can be purchased (the author of the video is Nail Poroshin).

TOP best manufacturers of spark plugs for VAZ

So which SZ for VAZ is better to choose?

Below is a list of the most popular device manufacturers:

ZAZS. VAZ vehicles are equipped with such SZ during production. The manufacturer recommends using ZAZS, citing the fact that these spark plugs are most optimal for domestic engines. However, many car enthusiasts do not trust this manufacturer and install SZ from other brands on their cars.
Beru. In particular, we are talking about the 14FR-7DU model. The main feature of such SZ is the use of a copper central electrode in the design, which has a nickel shell. Thanks to this, the SZ of this model is more resistant to corrosion and wear. The skirt is made in a conical shape, thanks to which the device quickly switches to self-cleaning mode. In addition, the spark power in these fire protection systems is quite high; accordingly, the combustible mixture will burn most efficiently.
Champion, namely the RC9YC model. If you believe the manufacturer, then such SZ have lower performance in terms of gasoline consumption. In addition, they are more stable, and their power when operating at higher engine speeds is higher.
NGK is one of the brands that supplies the highest quality products to the domestic market. The nickel model BCPR6ES-11 is currently considered one of the most affordable options. A power unit with such devices will operate more steadily. And when the driver presses the gas pedal, the engine can operate 4% more powerful than with traditional SZ. Separately, we should highlight the iridium spark plugs on the VAZ. If you decide to purchase iridium spark plugs at VAZ, you will be faced with a large assortment of models. They differ from each other both in cost and in characteristics. It should be noted that iridium spark plugs on VAZ have a longer service life. Depending on the model, iridium spark plugs on a VAZ can last up to 100 thousand kilometers or even more. Of course, such advantages also affect the cost of SZ as a whole. Iridium spark plugs on VAZ have an iridium electrode, which makes the spark even more powerful.
Denso Q20TT. Such devices have a thinner electrode, for the manufacture of which precious metals are not used. Accordingly, this has a positive effect on the price of SZ. As practice shows, when using such devices, the engine power will be higher, its dynamics will increase, and fuel consumption can be reduced. Of course, we are talking about a normally running engine.
Czech-made devices Brisk DR15YC are equipped with a copper core, as well as a longer electrode insulator, thanks to which the SZ can more quickly switch to self-cleaning mode. Accordingly, the use of these models is more relevant for vehicles that are used in urban environments. As for the replacement interval, in this case it largely depends on the quality of the fuel.
Bosch FR7DCU. Such SZ are equipped with a copper core mounted to a chromium-nickel shell. Accordingly, this enables the electrode to be more resistant to erosion or corrosion. Thanks to the use of nickel plating, the likelihood of thread sticking is minimized.
Finwhale F516. The body of this model is characterized by galvanic coating and is made of ductile steel. In addition, this model has good electrical insulation, as a result of which heat conductivity will be higher, which is ensured by the high content of aluminum oxide on the insulator.

Price issue

List of the best spark plugs for VAZ (Lada) cars - top 10

Products are divided into types, depending on the material of manufacture:

Nickel: The rod and side electrodes are made of nickel and are the most inexpensive. Service life from 5 to 30 thousand kilometers.
Platinum: the central electrode has a platinum solder, and their service life is longer, from 60 to 80 thousand kilometers. Accordingly, they cost more.
Iridium: on the rod electrode there is a soldering made of iridium metal, on the side there is a platinum soldering. These are the most expensive spark plugs with a service life of up to 100 thousand kilometers.

Depending on the number of electrodes, spark plugs are divided into two-electrode and multi-electrode.

The rating includes products that are suitable for use on older VAZ models, as well as modern versions of VAZ (Lada) cars.

NGK B9Eg-3530

This model is supplied to AvtoVAZ as a standard consumable part. A product with nickel coating on the electrodes, which prevents the formation of scale and guarantees the correct firing of the spark. All this saves fuel and prevents catalysts from wearing out. This model is considered one of the best on the market, famous for the fact that there are no defects in the batch of goods. Service life when using good fuel is up to 60 thousand km.

Advantages:

workmanship;

There are no fakes or inexpensive analogues on the market.

Flaws:

no major deficiencies were found.