Which spark plugs are best for a VAZ-2114: 8 valve injector

How to choose the right spark plugs for a VAZ

When choosing the best spark plugs for a VAZ engine, you should be guided by the parameters of the car and engine:

1. Heat number. If a spark plug is approved for use on a specific car, then it will be suitable in terms of its thermal characteristics. Small deviations play a seasonal role and depend on the owner’s driving style.
2. Geometric dimensions - diameter and thread pitch, length of the threaded part of the body. Protrusion or recession of the electrode area into the material of the block head is not allowed.
3. The nominal gap between the electrodes can be adjusted. The spark plug will operate uninterruptedly at the factory-set value.
4. The wrench size is of secondary importance and affects the applicability of the existing tool. It is always safer to choose the size that matches the factory size.
5. The sticking out of the electrodes has an indirect effect; the heat rating depends on it.

You should not get carried away with high-reliability spark plugs that have two to four side electrodes instead of the standard one. This will do little, but massive protruding parts can shield the working gap from the mixture flows in the cylinder, which will worsen the conditions for uninterrupted ignition.

All kinds of “patented” products mentioning plasma ignition, annular gap or with miniature prechambers are mostly advertising gimmicks; they will not work normally in all modes. It is better for the engine not to mess with such devices.

With contact ignition

Contact battery ignition was used on outdated engines with a carburetor and 8 valves, for example, VAZ models 2106, 2107 and the like. Such products have a reduced spark gap, since the power of the simplest ignition system is small, the secondary voltage cannot reach this value. The situation is saved by the low compression ratio of older engines. The higher the pressure at the end of the compression stroke, the more difficult it is to break through the spark gap.

Small size and power do not seem to be an obstacle to the operation of the motor. The engines are not particularly economical or environmentally friendly; the carburetors prepare a fairly rich mixture, which is not difficult to ignite even with a weak spark.

With contactless ignition system

For the first time, the contactless system was used on models 2108, 2109, early 2110, then engines of the classic family with Solex carburetors capable of preparing a lean mixture were equipped with such devices. The distributor with a Hall sensor worked on an electronic switch, which developed significant power in the secondary circuit; the voltage was enough to break through the increased spark gap at high pressure. It was possible to install more modernized candles or increase the gap in the classic ones.

For injection engines

With the advent of electronic fuel injection systems, ignition power has increased even further. The distributor has failed. Ignition modules with several coils or blocks for each spark plug without high-voltage wires have appeared. Requirements for parts have changed, including radio interference suppression. Such devices are not interchangeable. The injector can prepare lean and ultra-lean mixtures, while the engine maintains uniform thrust, which a carburetor cannot do.

Injection engines were installed on VAZ models 2114, 2115, 21074, which have 8 valves, and 2112 - 16 valves. These are modern units for their era, so choosing candles for them will not be difficult - many imported analogues are suitable.

Checking relays and ECUs and other sensors

1. It may be necessary to remove the fuel pump to check. You will need to remove the rear seat and check the voltage at the pump terminals. The device should show + 12 volts. Then crank the engine using the starter. When it is triggered, they proceed to subsequent actions. It may happen that when you turn the ignition key, the starter does not turn. Then you need to check the reliability of all wires on it. The cause may be a problem in the contact group in the ignition switch.

2. If it is determined that everything is in order, check the spark on the spark plugs. To do this you will need to open the hood. First, you need to unscrew the spark plug from the first cylinder. It is necessary to throw an armored wire over it and press it against the mass. In this case, the candle must be held with pliers and not with your hands. Otherwise you will get an electric shock. At this time, the assistant starts the engine. All other candles are checked in the same way. If there is a spark on each cylinder, it is necessary to look for ignition problems.
3. The situations may be different, for example, a spark is present on cylinders 1 and 4, but not on cylinders 2 and 3. The ignition module should be replaced. If the replacement does not give a positive result, you should look for the reason in the output transistor switches to the ignition module from the ECU. The ECU may need to be repaired.

4. It may happen that there is no spark on any cylinder. VAZ 2110 does not start because there is no spark. Often the reason for this lies in the crankshaft position sensor. The DPKV ECU gives a signal through which pulses are sent to the ignition module so that a spark is formed. The cause of the malfunction may be the lack of connection between the gear and the generator wheel. This can occur even if the DPKV is in full working order. At the same time, the crankshaft rotates, but the sensor will not process these rotations. Many are frightened by the fact that the VAZ 2110 injector has a large number of sensors. Indeed, there are a lot of them, but the reason that the VAZ 2110 does not start the first time is only one thing - the DPKV sensor is faulty.
5. It is necessary to unscrew the spark plug from the cylinder and check its moisture content. A dry spark plug indicates that the injector is not spraying fuel. Then check the pressure in the fuel rail. It has a special bolt on the side. It must be unscrewed and a pressure gauge inserted in its place. It will show the presence or absence of pressure in the ramp. But it may not be at hand. Then the bolt is unscrewed and the pump starts. If there is pressure in the ramp, a good stream will flow out of the hole.
6. If there is no pressure, the fuel filter must be replaced. The reason may also be that the line on the way from the fuel tank to the ramp is clogged. If the unscrewed candle turns out to be wet, then they all need to be unscrewed, wiped and dried thoroughly.

7. Sometimes the reason is that the injectors are clogged and need to be cleaned. Clogged injectors may cause the spark plugs to be flooded with fuel. Dirty injectors are often the reason why a car engine has difficulty starting.
8. Sometimes the reasons that the VAZ 2110 16 valves does not start may be of a deeper nature. They are very difficult to diagnose. But for the VAZ 2110 this is the exception rather than the rule.

Rating of the TOP 5 best spark plugs for VAZ cars

Copper-nickel spark plugs for VAZ cars of the “Standard” category are used on carburetor engines with a contact ignition system; their reliable service life does not exceed 10,000 kilometers.

Attention! These are products with a good reputation, so they are massively counterfeited. The rules for identifying the original can be found on the manufacturers’ websites.

In what cases is it necessary to replace spark plugs?

Replacement of SZ with VAZ 2115 and VAZ 214 is carried out every 30,000 thousand kilometers. If you do not change the SZ in time and continue to operate the car, then the wear of the electrodes sharply increases, this entails a drop in the car’s power and excessive fuel consumption. The condition of the spark plug and the ignition system as a whole can be determined based on the appearance of the electrode, the amount and color of carbon deposits on it. Brown soot is considered normal.

With long-term operation, the operating characteristics of the motor change. If you carefully monitor the operation of the internal combustion engine, then based on fuel consumption you can draw conclusions about the condition of the engine. Which spark plugs to choose for VAZ 2114-15. Brisk, Denso,. Knowledgeable people recommend changing spark plugs on VAZs after 20 thousand kilometers, and in winter even after 15 thousand.

You can judge the need to replace SZ by their appearance, more precisely by the amount and color of carbon deposits, as well as the gap between the electrodes.

Examples of varying degrees of soot

NGK 7529 BP6E

NGK 7529 BP6E

The spark plugs are universal and work across the entire range of temperatures and loads. They are resistant to the formation of deposits on the insulator, maintain the shape of the electrodes and the size of the gap. V-line technology ensures uninterrupted sparking. The copper rod in the central electrode removes heat, preventing overheating and damage to the insulator. The sealing of the housing is adequately done, the tightness is always at its best.

The gap for these spark plugs is 0.9 mm. This means that it is better not to use the product for a carburetor engine, only an injector.

The price for such quality is attractive and does not go out of the general range in the category.

The cost of candles is, on average, 150 rubles per piece.

Advantages and disadvantages

Good engine starting in any weather.

Sparking without interruption due to the use of new technology.

Excellent tightness.

Compliance price/quality.

There are often fakes on the market

BOSCH W7DC

BOSCH W7DC

Such candles have a working range that provides versatility of use. Sometimes they work on motors that require different temperature characteristics, which emphasizes the stability of German products.

The model is well assembled - it consists of a copper core and a shell with increased anti-corrosion properties. The gap here is 0.7-0.8 mm. The key size is 20.8.

One can note some optimism in setting the heat number in relation to old VAZ car engines.

The average cost for one candle is 150 rubles.

Advantages and disadvantages

High-quality assembly of the part.

Uninterrupted operation under heavy loads and low temperatures.

Price corresponding to quality.

The mixture may get on the spark plugs.

BRISK Classic L15Y

BRISK Classic L15Y

A characteristic feature of the Classic L15Y model is the ability to operate at reduced secondary voltage energy, which is suitable for older VAZ cars. A slightly lower heat rating and a small gap allow you to confidently start the engine at sub-zero temperatures; the spark plug warms up quickly and is not prone to sparking and carbon deposits.

However, because of this, the products may fail under loads and high temperatures, but for low-powered classic VAZ engines this will not be a discouraging factor. The service life is average in the class of budget candles based on copper and nickel.

The cost in the store is about 80 rubles per piece.

Advantages and disadvantages

• Starting in sub-zero temperatures.
• Low cost.
• Suitable for old VAZ models
• Does not withstand heavy loads.
• Service life is shorter than that of competitors.

DENSO 3043 W20EP-U

DENSO 3043 W20EP-U

The best candles for this application took first place in the ranking. Experienced car service workers always recommend Denso products, knowing that the client will be satisfied. There will be no complaints about the candles; the products guarantee their operation regardless of the mode - idle or load.

There are some downsides - the U-Groove technology does not prevent you from driving on a cold engine at low speeds, soot formation is possible, the spark plugs are a little colder in heat rating than inexperienced drivers would like.

The gap on the product is 0.8 mm, therefore, it is not suitable for a carburetor engine.

The cost, on average, is 130 rubles per unit.

Advantages and disadvantages

Excellent quality, which is why spark plugs are installed on many cars from the factory.

Copper core ensures reliability.

Increased flame spread thanks to the U-shaped groove of the side electrode.

Soot quickly forms on candles.

Other reasons

In addition to the already mentioned main reason for flooding candles, there may be others:

1. When starting, the crankshaft turns slowly (we are repairing the crankshaft).
2. The malfunction lies in the valve stem seals, which allow oil to pass through (we change the valve stem seals).
3. The injector is clogged, but continues to supply gasoline and fills the spark plugs with it (we clean the injector).
4. Water appears in gasoline (this happens most often in winter, we choose the right brand of gasoline - “winter” or “summer”).

The latter case is also quite common, especially at sub-zero air temperatures. This is due to the fact that gasoline, which has low volatility, has a poor combination with cold air, so the fuel mixture becomes heterogeneous and begins to flood the spark plug elements.