Smooth engine start, with high air humidity or in the cold season, becomes a real torment for motorists. And this is due, first of all, to the fact that the fuel mixture fills the spark plugs. Why this happens, and how to fix this problem, will be discussed later.

Reasons for pouring candles

When trying to start the car, the starter moves the valves of the engine cylinders, thereby trying to start it. At this time, the formation of a fuel-air mixture occurs in the cylinder chambers, which should flare up after a discharge jumps across the spark plug.

What happens at high humidity and low temperatures? The fact is that the course of a chemical reaction is disrupted in the fuel-air mixture, due to which its ignition does not occur. And, of course, because of this, spark plugs are poured.

In fairness, it must be said that such a malfunction occurs, as a rule, only on old car models and on cars with serious mileage. This is due, first of all, to three reasons:

• Reduced compression in the engine cylinders,
  how to measure compression:
  on injection engine
  on diesel engine
• Low quality gasoline;
• Clogged nozzles.

What to do if spark plugs are flooded

There are three ways to fix the problem yourself when flooding the candles.

METHOD # 1. Replacing candles

Using a spark plug wrench, one by one, the old spark plugs are unscrewed and new spark plugs are installed.

METHOD # 2. Cleaning old candles

Cleaning old candles of any type is done in the same way. The candles are unscrewed and cleaned with a metal brush - without incandescence, if the carbon deposits are small and easily removed.

And heating will be required if a large layer of carbon has already formed on the candles. You need to ignite the candles until they turn red. After that, the carbon deposits can be easily removed, and after the candle has cooled down, its contacts will need to be cleaned. However, excessive overheating of the candles will lead to cracking of their ceramic insulator and the impossibility of further use.

METHOD # 3. Purge execution

One of the most effective, safest, and easiest ways to fix the candle flooding problem is to purge. Blowing (aka drying) of the candles is carried out as follows:

• We recessed the gas pedal all the way, opening the throttle to the maximum;
• At the same time, we continuously rotate the starter.

As a result of such manipulations, air, in a sufficiently large amount, begins to enter the cylinders and enters the candles, drying them. Purge is used for both injectors and carburetor engines. The only drawback of purging is that it cannot be used with a low battery charge, since it discharges quickly enough during this procedure.

How to keep spark plugs from flooding?

It turns out that candles will not be flooded if you follow three rules:

• Use only difficult-to-thicken engine oils that are not afraid of low temperatures;
• Use only high quality fuel and only the brand that is supposed to be used for a particular car;
• Systematically adjust the injectors on the injectors, and perform their routine cleaning (how to rinse the injectors with your own hands).

SUMMARY

Preliminary preparation of a car for operation in the cold season is a guarantee of its reliable operation.

Of the "little things" that are often forgotten by novice drivers, it is possible to note the switching of the filter to the "winter" mode from the "summer" mode. In addition, you must always monitor the high battery charge, for easier engine winding. Well, as for the candles, you need to know that one more set of spare candles will never be superfluous! After all, candles can be poured at any time, and you need to be ready for this.

Video: New method for cleaning spark plugs

Video: Drying candles on a VAZ 2114

If the video does not show, please refresh the page or

Probably every car enthusiast faced such a problem when, after a short downtime, the car suddenly refused to start. And there may be a dozen reasons for this. The most likely one is a discharged battery. However, something else can also happen - for example, the car stopped starting due to the ingress of fuel on the spark plugs. And not only on carburetor cars it fills candles. VAZ-2110 (injector), "Priora" and many other cars are also not immune from this misfortune.

Even foreign cars are not an exception. That is why in today's article we will look at why the candles on the injector are flooded and how to fix this problem.

The reasons

The most common of these is the malfunctioning of the vehicle's electronic unit. What is most interesting is that it fills the candles on the injector more often in winter at subzero temperatures than in summer. And this is not an anomaly. There are objective reasons for this. As the temperature drops, mixing the air / fuel mixture is complicated by the fact that a large amount of oxygen requires a large volume of gasoline in cold air. In this regard, the electronic control unit sends a signal to the fuel injectors, thereby increasing the amount of fluid supply. This is the main reason why it floods the candle.

And what happens in the engine at this moment? The injectors supply gasoline to the combustion chamber of the engine, while the starter is trying to create the necessary compression in the cylinders, at the same time trying to emit a spark to generate a flash. At the same time, do not forget about the quality of our fuel - a lot of impurities and dirt significantly aggravate the operation of the injectors, hence the corresponding troubles.

With perfect compression, the spark plugs may well start even with a minimal impulse, but this only happens on new cars. Therefore, it fills the candles on the injector most often on cars over 3-5 years old.

What happens?

As a result, we get a weak spark, compression in the cold does not correspond to normal parameters. And the nozzles at this time continue to supply gasoline to the combustion chamber, which fills the candles, and they, in turn, stop generating a spark to ignite the mixture. Thus, the car stops starting normally, and when you unscrew the candles, you can clearly see the accumulation of foreign liquid on their surface.

Solution of problems

How can I fix this problem? The instruction manual for modern cars says something like the following: "If you pour candles on the injector, you need to unscrew them and dry them thoroughly." In this case, the starter must be scrolled within 10-15 seconds after removing these elements. Next, the dried candles are reinserted into their original place, and after that the engine is started. In this way, the automaker offers us to fix the problem.

But there is another, popular, way to eliminate this trouble. If you pour the candles on a cold one (injector), before unscrewing and drying them, you should start the engine as follows. For injection internal combustion engines, the gas pedal is pushed to the floor until it stops, the engine is scrolled by the starter for about 10-15 seconds, then the pedal is released. In most cases, this will help start the car. The essence of these manipulations is to purge the "wet" candles with air (in this case, the fuel supply is completely shut off).

What to do if the engine does not start after that?

In this case, dry these elements. In general, the candles that go to injection engines are no different from those that are installed on carburetor ones, so the method described below can be considered universally used.

This method consists in the following. After unscrewing, the candles are cleaned with a special metal brush from the accumulated carbon deposits, then dried with an ordinary hair dryer. Alternatively, you can hold them over the burners of the gas stove. Next, the gap is checked, and the dried candles are screwed back into place. In this case, the engine will accurately start at any temperature.

on the injector every day?

It happens that gasoline gets there every morning. Of course, even the most patient car enthusiast will quickly get tired of carrying out such drying work on a daily basis, so in this situation we send the car for diagnostics. You can order this service at the service station, or you can do it yourself. In the latter case, the spark plugs should be diagnosed for the quality of spark generation, its output should be checked for cleanliness of the injectors and operation. Perhaps the problem lies in one of these details.

Under what conditions will the candles not be filled with gasoline?

In order not to suddenly encounter a similar problem in the garage in the morning, you should always keep your car in good technical condition. The conditions that exclude the occurrence of this problem are:

Finally, we note another popular method of prevention. According to it, it should be regularly (3-4 times a week) within 10 seconds to increase to the red scale (4.5-5 thousand revolutions), so that self-cleaning of carbon deposits in the combustion chamber of the internal combustion engine takes place.

Thus, we looked at the factors of fuel formation in candles and learned how to solve this problem.

Imagine a situation that can often be observed in winter: a driver, having left his car in the garage, cannot start the engine in the morning, even with a charged battery. Such cases are typical for winter, since at low temperatures the processes in the motor are almost unpredictable. The fuel may not ignite completely, and then the candles are flooded with gasoline, despite the fact that a spark is formed. Let's say the mixture is too rich and the compression is insufficient. Then, in any case, the combustion process cannot go on. The reasons for such phenomena have long been known, and how to deal with them is described further.

Why is this happening

The operation of injection engines, where the mixture is formed in the volume of the fuel rail, is always controlled by a special controller. The control unit in question is also called "ECU":

The injection motor will not start without the ECU unit

The program installed in the unit memory always determines for how many milliseconds each of the nozzles should open. The longer the nozzle is open, the richer the mixture is formed. And in winter, at low temperatures, the controller seeks to enrich the mixture to the maximum. And then the following happens:

• The concentration of gasoline in the mixture is at its maximum, but the temperature of the fuel and air remains lower than it is typical for the summer period;
• Compression in the cylinder, due to worn parts, may be insufficient;
• If there is carbon deposits on the contacts of the plug, sparking does not occur as expected by the developers.

In total, these three factors lead to the following result: the fuel does not burn, but gets on the spark plug contacts. As a result, sparking stops, and then, when you try to start the engine, gasoline is pumped into the cylinder. Then, at a certain point, the fuel detonates.

When the candles are filled with fuel, you can observe the same symptoms on any car. Starting during the operation of the starter does not occur, but the driver will hear the pops characteristic of such cases (the result of detonation).

Causes of the problem and set of solutions

If the spark plugs are really flooded with gasoline when starting the engine, then you need to check how well the spark is forming in the engine. You may have to sequentially unscrew each of the candles, having previously removed the high-voltage connectors. In this case, the ignition must be turned off. It is advisable to disconnect one of the battery terminals too.

Use a box spanner to disassemble

What to check:

• There should be no carbon deposits on the contacts of the spark plug;
• The distance between the contacts must correspond to the "passport value".

The bad news is that the reason for the unstable formation of a spark can be the poor quality of the wiring, and any malfunction in the ignition control system. Sometimes finding the cause takes longer than fixing the defect. In such cases, it is difficult to do without the help of professionals. Don't overestimate your strength.

By the way, you can try to reason logically. The controller regulates the concentration of the mixture based on the air temperature values. And these values ​​are determined according to the readings of the only sensor - DTOZH.

Any temperature sensor is a thermistor

This is, of course, the coolant temperature sensor.

The readings of the antifreeze temperature sensor may in fact be underestimated. Then don't be surprised that the mixture is too rich in fuel. The recommendation to fix the problem looks trivial. The sensor needs to be replaced.

Note that in modern engines, not one temperature sensor is used to calculate the mixture concentration, but several. An air heating sensor installed in the intake manifold can also be used. But the presence of engine oil in the manifold is not uncommon. And imagine what will happen if liquid gets on the body of such a sensor.

The controller program is designed so that the main source of information about the air temperature is the DTOZH sensor. For modern engines that use a variety of temperature control elements, this is also true.

If the candles are already flooded, what to do next

If there is a suspicion that at least in one of the cylinders the spark plug is filled with gasoline, proceed as follows:

1. They stop the starter, turn off the electrical wiring, dismantle the spark plug;
2. Close the candle well so that no dust gets into it. The shaft is scrolled by 10-15 revolutions with the help of a starter;
3. The candle is dried and replaced.

1. The spark plugs can be dried in the engine itself before performing “step 1” above. When the starter is working, the gas pedal is recessed "to the floor" and air is sucked in through the ramp;
2. To remove carbon deposits, you can use a metal brush. A regular toothbrush will work too;
3. If the compression in the cylinder is insufficient, it will be useless to change or clean the plugs. Only major repairs will help here.

When replacing or reinstalling candles, it is advisable not to overtighten their fastening. At the same time, a plug that is not screwed in will cause breakdown of all engine systems.

A modern driver simply has to be ready for various surprises from his car and must react to them correctly, especially in winter. The article discusses the reasons for filling candles on an injection engine, the causes of this phenomenon, as well as solutions.

Main reasons

As practice shows, the distributor of problems with candles is the electronic control unit and its firmware.

Filled candles with engine oil.

At a negative air temperature, the system tries to create the necessary conditions for the air-fuel mixture. Since the proportion of oxygen in the frosty air is higher, the injectors receive an order from the computer to supply more gasoline. Under these conditions, the candle also tries to work, but the quality of the mixture does not correspond to the required one. Subsequently, the compression level is too low, the ignition does not work and, as a result, flooded candles.

Solutions

There are two ways to fix this problem.

The essence of the first is as follows. To begin with, the candles are twisted and dried. After that, they twist the starter for about 8-12 seconds. Upon completion of the operation, the candles are installed back and an attempt is made to start the engine.

The second method is to start the engine in “purge mode.” The procedure is as follows:

• pressing the gas pedal all the way
• turning the key in the ignition lock
• cranking the starter for 8-10 seconds.
• return of the pedal to its original position.

The essence of the method lies in the fact that when the gas pedal is pressed all the way, the gasoline supply is shut off, and the candles are blown only with air.

If, after performing the above steps, the engine still does not start, it is necessary to dry the candles.

Candles are usually dried with a toothbrush and hair dryer. Sometimes you can find such a solution to the problem as piercing a candle in the comfort zone.

If the candles are poured daily, then you need to check the presence of a spark outlet, its quality, nozzles, etc.

It happens that almost every day he floods the candles on the injector. In such a situation, it is necessary to conduct a full check of the elements - for the presence of a spark outlet, the cleanliness of the nozzles, the quality of the spark, and so on.

In order not to collide with the filling of candles in the injection power unit, it is necessary to follow certain rules for operating and caring for the engine:

The condition of the filled and new candle.

• battery charge control
• starter serviceability monitoring and timely repair if necessary
• use of the highest quality oil for winter use
• timely replacement of spark plugs
• regular inspection of high-voltage wires
• adjustment and cleaning of injector nozzles
• use of high quality fuel
• if possible, travel at least 50 km at a time once a month.

If you get behind the wheel, you find that the engine won't start, don't be discouraged. Maybe your spark plugs are just flooded. This problem especially often arises in the winter season, which already causes a lot of trouble for motorists. Most often, the candles are poured with gasoline, sometimes oil. You need to understand how and why this happens, then you can act proactively and avoid a situation when the car cannot be started. Well, if everything has already happened, then it will be nice to know how to return the spark plugs to working form and start the engine.

On the left is a flooded candle, on the right is a normal one.

Symptoms and Gulf Mechanism

When it comes to flooded spark plugs, it doesn't matter whether we are dealing with a carburetor or an injector. Both types of engine are not protected from flooding. Its consequences are unpleasant in that they do not allow the engine to start. At the same time, it can smell like gasoline, maybe, but most importantly, it is easy to find traces of a foreign substance on the candles themselves: gasoline, oil or carbon deposits. To assess the condition of the candles, they must be unscrewed.

The bay mechanism is quite simple. The fuel supplied to operate the engine is non-flammable. The spark plugs get wet and this blocks the ability to start the engine normally.

Seven Reasons for Cold Candles

If you decided to start the engine, but nothing worked, and instead you found sparks stained with gasoline, then this could happen for the following reasons:

1. Insufficiently charged battery ... Even if at positive temperatures the battery coped with its tasks without any problems, the onset of frost could radically change the situation. It is enough that the battery is discharged by 50%. Even with such an indicator, the power may not be enough to start the motor.

2. Cylinder wear... A worn out engine cannot perform perfectly, so it is not surprising that new engines have insufficient cylinders. Combined with other factors, this can lead to candle flooding.

3. Old spark plugs ... It is not for nothing that this part is consumable and requires regular monitoring, and, if necessary, replacement. If you do not change the candles for a long time, then defects appear on them, which can prevent sparking, which is so necessary to start the motor.

4. Malfunction of structural elements of the ignition system Defective wires and sour contacts can be one of the reasons that caused the flooding of candles.

Wear

5. Low-quality fuel ... This does not mean that you were deceived and sold to you bad gasoline. The point is that in winter there are a number of factors that can negatively affect the quality of fuel.

For example, the formation of condensate in the fuel tank and its ingress into gasoline. As a result, the fuel does not ignite at the right time, which becomes one of the reasons for "wet" spark plugs.

6. Unsuitable engine oil .When it comes to winter, then you need to use oil with such a viscosity that will not load the engine, otherwise it will become another factor creating conditions for the bay.

7. Accumulation of carbon deposits in the combustion chamber ... Short trips in urban conditions do not allow the motor to "breathe". As a result, carbon deposits are formed, which are deposited in a thick layer on the walls of the combustion chamber. The mobility of the piston rings is reduced, and with it the compression in the cylinders. As a preventive measure, it is necessary to run the engine at high speeds. Sometimes, in order to restore the mobility of the piston rings, a special flushing of the system is required.

Sometimes it happens that there is a spark and the starter rotates normally, but gasoline still spills out. In this case, it is necessary to carry out diagnostics for serviceability. In rare cases, the problem may be in the ECU itself.

Engine oil on candles

Gasoline isn't the only liquid found on candles. Sometimes they are filled with engine oil. Again, this can happen with both the injector and the carburetor. In this case, it is important on which part of the candle there are traces of oil. If the top of the plug is stained, the problem is most likely related to the valve cover gasket. If oil is observed at the bottom of the spark plug, then you need to take care of the condition of the engine and the compression in it. Read about the reasons for the appearance of oil on candles in

Ambulance for filling candles

If you follow the manufacturer's instructions, then the whole procedure for solving the problem can be presented in several steps.

Step 1. Unscrew the candles.

Step 2. Dry the wet part.

Step 3. We turn the engine without spark plugs for 10 seconds.

Step 4. Put the dry part in place.

Step 5. We are trying to start the engine.

But the driver does not always have time for these simple actions. Filling candles is an unexpected situation, and what if you don't have time to mess with wet parts?

Car enthusiasts have another way in reserve for such a case: starting the engine with purging the cylinders. It is performed as follows. This is an injection engine.

Depress the gas pedal all the way, then crank the starter for about 10 seconds. Return the accelerator pedal to its original position. Thanks to this manipulation, more air enters the cylinders, which allows the candles to dry out.

If the "folk" method did not help, then there is no getting away from the need to unscrew the candles and spend a certain amount of time on drying them. The unscrewed part is cleaned. You can dry it with a hairdryer, on an electric or gas stove.

Drying candles with a hairdryer is one way.

True, there is an even more effective way: buy new candles. Any drying will shorten the service life of wet candles. It is only a temporary measure, so if it is possible to replace the spark plugs with new ones, then in this case it will be the best option.

Prevention

By observing the following conditions, you can avoid the bay at any time of the year:

Refuel with quality fuel;

Clean the injector promptly;

Run the motor at high revs.