VAZ 2109: fills spark plugs; solution

Lada 21099 _silver_blue_ › Logbook › Fills the spark plugs with gasoline: why and how to start the engine

• Reasons why the spark plugs fill the injector • What to do if the spark plugs on the injector fill with gasoline • Conditions under which the spark plugs will not fill with gasoline

Hello, dear car enthusiasts! Maybe not all, but many motorists are faced with this problem: yesterday I arrived, put the car in the garage, everything was fine. This morning I started to start the engine, but it would not start.

There could be a number of reasons for this. But today we will look at the most common one - filling the spark plugs with gasoline, it doesn’t matter whether you have an injector or a carburetor. Fills spark plugs with gasoline regardless of the type of fuel system of the car.

It is characteristic that the spark plugs are filled with gasoline less often in the warm season, and more often at sub-zero temperatures. So let’s try to figure out in order: why the spark plugs in the injector are flooded, what to do to start the engine at the exact moment when the spark plugs are flooded, and how to prevent the spark plugs in the injector from flooding with gasoline.

• Reasons why the spark plugs in the injector flood

In principle, the reason why the injector spark plugs flood is simple. And the tones lie in the peculiarities of the “electronic brain” of your car.

At subzero temperatures, mixing the fuel-air mixture requires some effort: more oxygen in cold air requires more gasoline. Accordingly, the ECU gives a command to the injector nozzles to increase the fuel supply, which they do in good faith.

And the following happens in the engine, especially if your car no longer has a new battery. The injectors supply fuel to the combustion chamber, the starter tries to create the necessary compression in the cylinders, while at the same time trying to provide a spark to generate a flash. Do not forget about the quality of fuel, which does not have ideal parameters.

As a result, with ideal compression, the injector spark plugs can start even with a minimum impulse, but ideal compression is only found in a new car. Actually, this is why, as a rule, the injector spark plugs of a new car do not fill.

The spark is weak, compression in the cold does not correspond to the parameters, and the injectors continue to supply fuel to the combustion chamber. Which, in turn, floods the candles and they simply stop showing signs of fiery life.

Here is the answer to the question - why the spark plugs on the injector are flooded.

• What to do if the spark plugs on the injector are filled with gasoline

There are two options for resolving the issue. As a rule, the “smart” operating book says: if the injector spark plugs are filled with gasoline, you need to unscrew them and dry them. With the spark plugs removed, crank the starter for 10-15 seconds. Reinstall the spark plugs and start the engine. These are actions according to the manufacturer.

A proven popular driving method. If your spark plugs are filled with gasoline, before unscrewing and drying them, try to start the engine in the following way: purge mode.

For the injector: the gas pedal is pressed all the way to the floor. Use the starter to crank the engine for 10-12 seconds, release the gas pedal. The engine should start. The fact is that in this way, by cutting off the fuel supply, you blow air through the spark plugs.

The engine did not start. Then try drying the candles. Spark plugs for an injector are, in principle, no different from a carburetor engine. Therefore, we again use the “old-fashioned” method: we unscrew the candles, clean them from carbon deposits with a metal brush, or a toothbrush, and dry them either with a hairdryer, or on a gas stove or in the oven. We check the gap and screw the spark plugs for the injector into place. The engine should start.

For used cars, the recommendation of experts is to clean the spark plugs more often, or even better, replace them.

If the story of filling the spark plugs with gasoline repeats itself every morning, you need to carry out diagnostics: spark plug quality, injector cleanliness, spark output from the ignition coil, Hall sensor.

• Conditions under which the spark plugs will not fill with gasoline

Naturally, these are ideal conditions, but you can control many of them so that you don’t have to meet the morning in a minibus while going about your business.

So, the main conditions are:

- a well-charged battery and a working starter, - high-quality oil with the appropriate parameters for the cold season, - spark plugs and high-voltage wires are of high quality and in good condition, - injector nozzles are cleaned and adjusted in a timely manner. Preferably not with the help of various additives to the tank, but with the use of equipment for cleaning injectors - high-quality gasoline

People's advice: if you want the engine to start normally in cold weather and the spark plugs not to be filled with gasoline, the engine needs to be “twisted” periodically, once a month. Distance 50-100 km. at a car speed of 100-120 km/h and on good fuel.

Or once every two days, while driving, give the engine a load of up to 4500-5000 rpm for 10 seconds so that self-cleaning of carbon deposits and deposits in the chamber occurs.

As you can see, these conditions are easy to control yourself, without the help of car service specialists.

The spark plugs are filled with gasoline, what should I do?

There are several options to correct the situation: the simplest is to unscrew the spark plugs from the engine and dry them. After removing the spark plugs, you need to turn the key in the ignition switch so that the starter spins for about 15 seconds, after which you can put the dried spark plugs back in and turn on the engine. This is what the car manufacturer recommends and writes in the operating instructions.

But there is another proven method - if the spark plugs are filled with gasoline, then before unscrewing the spark plugs and starting to dry them, you should try to start the engine using the purge mode.

To turn on this mode, in a fuel-injected car you need to press the gas pedal to the floor and turn the key in the same way so that the starter spins for about 12 seconds, after which you need to take your foot off the gas pedal, and the starter should continue to spin. The engine should start at this moment, after releasing the gas pedal.

It turns out that when you turn off the fuel supply, the spark plugs are blown out with air. If after such manipulation the engine still does not start, then you need to dry the spark plugs. Injection spark plugs are no different from carburetor spark plugs, so you can safely do the same as they have been doing for centuries - they unscrewed the spark plugs, cleaned them of carbon deposits with a metal brush, and therefore dried them with a hairdryer or gas stove. After drying, you can check the gaps and screw the spark plugs back in. After this, the engine should definitely start.

To prevent this situation from occurring frequently, you need to periodically clean the spark plugs or change them on time. If you fill the spark plugs on an injection engine with gasoline every time when they are cold, this means that you need to do diagnostics - check whether the spark plugs, ignition coils, high-voltage wires, injectors and Hall sensor are normal. If all these components are normal, then the question of whether the injector can fill the spark plugs will disappear by itself.

Fills the spark plugs of a VAZ 2109

Why do my car's spark plugs flood? Since you are reading this article, you know very well that if the Zhiguli’s spark plugs are flooded, the engine will not start. The engine does not start because a spark does not occur on a spark plug filled with gasoline. Reasons for filling spark plugs in a VAZ 2109 carburetor:

1. The carburetor float valve needle is stuck.
2. The level of gasoline in the float chamber is too high.
3. Warming up the engine with the choke closed and then trying to start the stalled engine, again with the choke closed.
4. The valve timing is incorrect (the timing marks are set incorrectly

Remove the high-voltage wire from the spark plug
1) The carburetor float valve needle regulates the gasoline level in the float chamber.
The needle can get stuck in different positions: if it gets stuck in the closed state, you will not start the car, since gasoline will not flow into the float chamber. If the needle gets stuck in the fully open state, the carburetor will begin to pour gasoline into the manifold and cylinders. In this case, the mixture turns out to be over-enriched and, if the suction is completely closed, the spark plugs can be completely flooded. What to do if the spark plugs are flooded due to a faulty float valve needle? The answer is simple - you need to replace the needle and correctly set the gasoline level in the carburetor float chamber. 2) If the gasoline level in the float chamber is too high, the needle works properly, but the float mechanism is set so that the gasoline level is too high. The consequences of this are again unpleasant: flooding of spark plugs and too high gasoline consumption. Remedy: set the correct gasoline level in the carburetor float chamber without replacing the needle. 3) Some people warm up the Zhiguli carburetor engine in the following way: they start the car with the choke closed, leave it running to warm up, and go home to drink tea. When they drank tea, they came and the car had stalled. They try to start it, but it won't start. It won't start because the spark plugs are filled with gasoline. The mistake that tea drinkers make when warming up a carburetor engine is as follows: as the engine warms up, it is necessary to open the throttle valve slightly. When the engine warms up, the combustion conditions of the combustible mixture in the car’s cylinders change; if initially the spark is weak and the cylinder is cold, then as it warms up the spark becomes stronger, the cylinder heats up and the mixture becomes over-rich. As a result, the engine stalls because the mixture is over-rich. The owner, having drunk tea, comes and sees that the engine has stalled and begins to try to start it with the air damper closed and fills the spark plugs. Then you have to unscrew the candles and dry them. How to dry candles will be described below. 4) If the timing belt has slipped and the valve timing is disrupted, the engine will not start, or will start and operate incorrectly. That is, the spark will not be supplied at the end of the compression stroke, but later. In this case, the combustible mixture will not burn completely. At the same time, the engine does not develop full power, and fuel consumption increases. What to do if you still fill the candles. You ask: “How do you know if the candles are flooded?” Take the spark plug wrench and unscrew the first spark plug.

VAZ 2109: flooding spark plugs - problem solution

VAZ spark plug filled with gasoline

Autumn does not please everyone with colorful foliage, and winter is associated not only with fluffy snow, festive mood and the New Year. For motorists, this is a time to test their endurance with cold, problems with starting the engine and disgusting slippery and dirty roads. Yes, it is precisely motorists during these periods who have to tinker with their four-wheeled friends, experiencing constant discomfort. The largest and most common of them, which greatly complicates the life of the driver, are spark plugs, the operation of which is affected by the weather. Poor engine starting in cold weather leads to the fact that the VAZ 2109 spark plugs are filled with gasoline. This makes further starting of the engine impossible. It is important to understand why this happens and how to fix the problem with your own hands and available means.

What are candles

Let's look at the device so that you can understand more clearly what we are dealing with:

• The spark plug housing is screwed into the cylinder head
• The insulator material in it is heavy-duty technical ceramics
• From the inside, a central electrode is fixed on one side and a contact rod on the other in the ceramic part of the spark plug.
• And between them there can be a resistor that suppresses radio interference
• Its side electrode is welded to the body

The design differences between the spark plug insulator and the central electrode itself make it possible to divide them into hot or cold:

• Hot candles are distinguished by a large surface of the insulator, which protrudes into the chamber and is heated by burning gases, and the transition zone from the insulator to the outer shell, on the contrary, is small
• Cold ones have an increased heat removal zone, so their working surfaces heat up less
• The heat number expresses the ability to accumulate heat
• Therefore, in order to choose the right replacement spark plug, you need to use an interchangeability table or a proprietary catalog, because the manufacturer has its own catalog system

Concept and principle of operation

Filling the carburetor with spark plugs on a VAZ 2109, and you don’t know what to do? First you need to find out the structure and find out the location. The product is made of a ceramic base, inside of which there is a rod and a contact electrode on the side. A resistor is installed between them to level out radio frequency interference. The spark plug itself is screwed into the cylinder head.

Based on the design features of the location of the insulator and electrode, they can be divided into 2 types

:

• Hot
  : the insulator area is much larger than that of a cold one, so it is heated by gases in the combustion chamber. The transition zone to the outer shell is minimal;
• Cold:
  they have an elongated area for heat removal; accordingly, the working surface heats up much less.

There are a number of numerical and letter designations that indicate the ability to accumulate heat, the so-called potassium content. When purchasing, be sure to compare the data with the index table, or the catalog if you purchase in a specialized store.

The reason for filling is precisely the lack of a spark at the time of fuel supply. Several such feeds and the spark plug is wet from fuel and cannot pass a spark, which means there is no ignition.

It will be useful: How to install engine heating on a VAZ-2110: diagram, instructions

During frosts, the fuel mixture cools so much that the spark plug is unable to light, even if it is in good working order. Typically, the critical temperature is -15°C

.

How do candles work?

To understand what is happening and why, we need to understand the nature of the phenomenon occurring, and the roots of the phenomenon are hidden deep under the hood:

• The chain reaction that leads to the VAZ 21093 i flooding the spark plugs begins when you just turn the key in the ignition
• When a combustible fuel-air mixture is supplied to the combustion chamber, which consists of a mixture of gasoline and air that entered this chamber through the intake valves. These valves were brought into operation by the starter. Everything is clear here for now
• The spark plug at this point in time provides an ignition spark, which “comes” through the high-voltage wires from the ignition coil
• Then the mixture of fuel and air ignites from a spark, and a small micro-explosion occurs, after which the engine starts, valves and pistons, and all other mechanisms begin to move

Scheme for detecting problems in the ignition system based on the state of the spark plugs

Solving the issue in several ways

Radical (cardinal) decision

If the VAZ 2109 is filled with spark plugs, the main question is what to do? And we do the following:

• We go to a car store with an old spark plug for a sample, select new spark plugs in the image and likeness of the old one, and completely replace the entire set
• When choosing, beware of fakes; do not buy too inexpensive candles that also do not have original packaging.
• It is also recommended to take a close look at the new spark plugs and make sure there are no packaging defects, including the design, defects in the electrodes, ceramic base and inscriptions on it
• Defects in the thread or an easily removed or unscrewed O-ring also indicate a fake.
• However, the engine can stall somewhere on the road, far from “civilization” and shops
• If you look from the other side, replacement is an additional expense, and usually very inappropriate
• Let's move on to a more gentle, budget option so that the price does not hit your modest budget

The most economical solution

How to solve the problem without spending money:

• To save money, flooded car spark plugs need to be unscrewed and “heated”; a gas burner or a homemade torch will help with this as a last resort.
• Your task in this case is not just to heat the candles, but to warm them up until red, or at least with fire to completely clean them of carbon deposits, as well as traces of gasoline
• This method has negative sides; many experts claim that after this the candles will not last long, because such heating can damage the ceramic core of the candle itself
• In addition, a matte oxidation film appears on the electrodes, which it is advisable to remove with fine sandpaper

It’s up to you to choose, I’ll tell you, when you are far from the store and, as luck would have it, you need to go urgently, you don’t care about sentiment.

A quick solution from craftsmen

Instructions from folk craftsmen:

• In the absence of new spark plugs at hand, there is also nothing to “ignite” with, then you can use the old, so to speak “old-fashioned” method, which often helps solve this issue
• Flooded spark plugs simply need to be dried using a starter.
• To do this, do the following: depress the gas pedal completely, then rotate the engine for a while, only using the starter
• The influx of fresh air allows the surfaces of the candles to dry out.
• Due to the fully open throttle, gasoline will not flow into the combustion chambers
• After drying, the engine should start, although not on the first try.
• The disadvantage of the “old-fashioned” method is that there is a high probability of completely draining the battery
• And after that, another driver can help you, who will agree to “give your engine a light” from his
• Or a spare battery, but the likelihood that you will have it at the right time is zero
• Now it is clear to the owners of the VAZ 2109 why the candles are flooded, as well as ways to cope with the problem

That’s all, I hope the material in this article will help you out in difficult times, and you won’t get confused; in addition, it’s worth watching the video lesson, since a person perceives and remembers information better through a picture.

Floods spark plugs on a carburetor engine, reasons

Flooded, wet spark plugs after starting - this situation is familiar to almost all owners of cars with carburetor engines.
At the same time, starting the engine with flooded spark plugs is very problematic. If you unscrew the spark plugs at this moment, they will be wet and filled with gasoline, which in most cases is a consequence of the very rich enrichment of the fuel mixture during the start-up mode. List of the main reasons leading to flooding of spark plugs

— Starting a hot engine on choke.

Starting a warm engine with the choke handle extended towards you and the air damper closed will lead to a strong enrichment of the fuel mixture in this mode and, as a result, flooding of the spark plugs.

air damper open during hot start

— The carburetor starter is faulty or not adjusted.

The problem mostly concerns cold starts. It is necessary that the starting gaps “A” and “B” are set exactly, that is, the starting device is adjusted. In addition, the PU diaphragm mechanism must have a complete, unbroken diaphragm and have a sealed housing. Otherwise, when starting a cold engine, the carburetor air damper will not open slightly (this is the whole point of the control unit), forcibly depleting the fuel mixture with a portion of additional air. The absence of such an opening will lead to excessive enrichment of the fuel mixture when starting a cold engine and the spark plugs will flood.

visible elements of the Solex carburetor starting system

— The spark plugs are faulty.

“Punctured” spark plugs with black carbon deposits and an incorrect gap between the electrodes will not be able to ignite the rich fuel mixture entering the cylinders during the start-up mode and will be immediately filled with gasoline. It is advisable to have a spare set of spark plugs so that if necessary, you can quickly change them. Faulty spark plugs can become flooded with fuel, both during cold and hot starts.

What to do if the spark plugs are filled with antifreeze

The main reasons for this malfunction are burnout of the cylinder head gasket and violation of the head geometry

. As a rule, this occurs after repeated overheating of the engine. If the geometry is violated, the head must be ground; this is a complex and expensive service.

The most difficult situation is a violation of the geometry of the cylinder head. Not every service station will be able to fix the problem, and if they do, they won’t give you a 100% guarantee. If you have an old engine, it is more profitable to replace it with a contract one.

Why does the carburetor flood the spark plugs on a VAZ-2109 car?

Quite often, VAZ-2109 carburetor owners have to solve a problem, especially in winter, the essence of which is the so-called filling of spark plugs with fuel.
If gasoline gets on these elements, the car simply will not start, despite the fact that the day before it worked properly and never let the driver down on the road. Why does the VAZ-2109 carburetor flood the spark plugs with the onset of cold weather? It is this question that should be answered before you begin to fix this problem yourself.

How to do it?

The tools you can use are a regular toothbrush (or a metal brush) and a hair dryer (for more effective drying).

If you have the opportunity to take the candles home, you can “calcinate” them in the oven or directly on the burners. But this method is only temporary.

If the candles have already expired, then it is better to simply change them.

It happens that almost every day the spark plugs on the injector are filled. In such a situation, it is necessary to carry out a full check of the elements - for the presence of spark output, cleanliness of the injectors, quality of the spark, and so on.

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How spark plugs work

Before you begin replacing or cleaning spark plugs, you should understand how these elements work. After all, as soon as the driver turns the key in the ignition switch, the “filling” of the analyzed components can begin:

• the air-fuel mixture enters the combustion chamber and passes through the passage channels of the valves;
• the valves, in turn, will be able to open if the starter’s rotational power is sufficient;
• spark plugs produce a spark, which is sent by the ignition coil along high-voltage wires;
• Thanks to the spark, a so-called explosion occurs, which affects each cylinder in turn, which allows the car engine to start.

If a spark does not form when gasoline is supplied, the system will be forced to repeat the entire starting process, and every time you try to start the engine, the spark plugs are filled with fuel. As a result, the wet element simply will not be able to produce a spark, so the car will simply not be able to start.

Why does this malfunction occur most often in winter? Because the air-fuel mixture cools greatly.

And the more the mixture cools, the more difficult it will be for the candle to light a spark, even if it turns out to be fully operational.

Wet spark plugs: causes

Based on the practice of most motorists, the following circumstances are a precursor to flooding:

• Filling with low quality fuel. In winter, an important factor is the purity of gasoline from undesirable components that have a direct impact on the quality of ignition. Excessive amounts of paraffin will minimize ease of starting in such “cold” conditions. Do not forget about the presence of condensate in the tank, which collects due to temperature changes.
• Ignition system failures. Difficulties are created not only by candles, but also by the operation of high-voltage wiring. Old spark plugs that have been in use for a long time may have distorted gaps and defects on the body or electrodes. The consequence is that there is no spark. It is important to monitor the performance of the system as a whole.
• Low battery charge. You should expect problems when the charge level is low - 40–50%. When the ambient temperature drops, not every battery is able to operate, delivering maximum power sufficient to rotate the starter and fully operate the ignition system. The result is the supply of fuel to the cylinders, however, ignition does not take place, the electrodes of the spark plugs are flooded.

In reality, what may happen is that the electronic control unit takes into account the external temperature, the current heating of the engine, the amount of oxygen in the air sent to the engine, etc. A command is sent to open the injectors, which ensures that the mixture is enriched with fuel, facilitating a cold start. At initial idle speed, the automation helps ensure stable operation/start-up of the power plant.

What should a VAZ-2109 car owner do if the spark plugs are filled with fuel?

VAZ-2109 carburetor car owners can solve the problem of “filling” spark plugs in two ways:

1. You can, of course, unscrew one of the spark plugs and buy exactly the same element, fully assembled, in specialized stores or at automobile markets.
2. Take advantage of a more budget-friendly option and solve this problem yourself. This process is quite simple, so every car owner can cope with it if replacing and cleaning the spark plugs is carried out in stages:

• all candles must be carefully unscrewed from the so-called “sockets” and ignited under the flame of a gas burner, holding them with ordinary pliers;
• these elements need to be heated until the metal turns red in order to completely remove carbon deposits and any contaminants;
• after warming up, you need to use fine-grained sandpaper to get rid of the film that forms during the oxidation process around the connectors;
• Then all that remains is to screw the spark plugs into their original place, and the replacement process can be considered complete.

According to many experts, although such a process is considered economical, it will not help to operate thoroughly heated and cleaned components for a long time, since this process quite often damages the candle core, the basis of which is fragile ceramics.
Therefore, if car owners decide on this replacement method, they must understand that, most likely, in the very near future the spark plugs may fail again, and they will have to repeat the whole process again. It is best to immediately buy a new set of components that match the markings and use them for their intended purpose. After reading this article, every owner of a VAZ-2109 carburetor will be able to independently replace the spark plugs, clean and dry them, and, of course, install them in their original place. Such an event will not take much time, and if questions or difficulties arise during the replacement, you can simply watch a video tutorial on the Internet resource, which will further simplify the replacement of failed elements.