Fills candles on a carburetor engine, reasons. Seven reasons why it floods candles

Not so long ago I wrote how to clean spark plugs from carbon deposits (you can), the article is really useful with many photo and video materials. But today I want to talk about another problem, it happens that in the morning in the parking lot (especially in winter) we cannot start the car. I must say that if you did not start the car the first time, then it is already more difficult to do this, it can simply fill in the spark plugs. You "turn" the engine a second and third time and many more times (until the battery runs out), but the car will not start. And it's not always a breakdown, it's just that the car's candles do not give the correct spark, as ordinary motorists say (like us, with you) the candles are flooded. Let's talk today why this happens and how to avoid it …… ..

What does it mean - "flooded" the spark plugs?

For beginners, this is not always clear, this question. Everything is very simple. As we already know in an internal combustion engine, during operation, several processes occur.

The first is the supply of the fuel-air mixture (when the fuel is mixed with air and supplied to the engine cylinders).

The second is the compression of this mixture by the engine cylinders (the valves are closed, the piston goes up, reaching its maximum point).

The third is ignition (a spark is applied to the candles, whereby this compressed fuel ignites, a mini explosion occurs, and the piston moves down)

The fourth is the exit of these exhaust gases (when the burnt fuel leaves the engine piston, through the valves and then the gas exhaust system - the muffler).

But when it is cold outside, freezing temperatures, the third cycle of "ignition" does not always happen. That is, the fuel mixture (gasoline + air) enters the engine cylinders and does not ignite. Thus, the fuel simply floods the candles., they become wet, and on such candles, the formation of a spark is almost impossible... If the candles get wet and then "turn" the engine, then you only aggravate the situation, because the cycles go on - no ignition occurs - the candles get more and more wet from the fuel.

Why is there no spark and flooding?

Everything depends on the device of your car (), as well as on the state of your car's battery.

Battery

The main culprit is this. At low temperatures, it does not create the required voltage on the engine plugs, a weak spark is not capable of igniting the fuel. Because of this, candles begin to flood, after which the process is only aggravated.

Advice! Before the winter period, be sure to check the battery, if in the summer you can still ride on a weak battery, then this will not work in winter!

Carburetor

A simple but outdated fuel injection system. An incorrectly adjusted one can pour fuel into the combustion chambers, if at positive temperatures it still rolls, then with the onset of cold weather, excess fuel simply floods the candles. And it becomes almost impossible to start a car with a carburetor. Also, the carburetor has no fuel delivery gauge. That is, if you have not started the car, it will still "pour" gasoline in the volume in which it is configured.

Advice. Be sure to properly adjust the carburetor before winter. Otherwise, it will be very difficult to start in severe frosts (I know from my own experience).

Injector

More progressive, but also more complex system. At low temperatures, the on-board computer forces the injectors of the injector to supply more fuel to the air mixture in order to improve - enrich the composition. However, if the car has a "weak" battery, there is not enough spark to ignite the fuel, thus flooding the spark plugs on the injector. But you still need to be able to fill the injector! Unlike a carburetor, an injector has many sensors that monitor the engine and fuel delivery. If the car does not start, then the fuel is not supplied in a large volume, and therefore the filling of candles can be minimized.

Advice! If the car does not start from the first or third time, wait five minutes, then try again. If it does not start again, then you need to charge the battery and clean the candles.

What to do if the spark plugs are flooded?

1) First, charge the battery, most likely it is discharged.

2) You need to unscrew the old candles and put in new, dry ones, if there is a spare kit.

3) The filled candles must be dried. We unscrew and carry them home. and put them to dry, for example on a battery. If you are in a hurry, you can dry on a gas burner, only without enthusiasm, you do not need to glow red!

4) If you are in a hurry, you can try to start the car with filled candles. To do this, we squeeze the gas pedal all the way and try to start the car. The air that enters the cylinders can dry out the candles a little! At the injector - the on-board computer turns off the excessive fuel supply, thus drying the candles. And the carburetor does not create increased pressure in the cylinders, I would even say there is a rarefaction, which is also able to draw out excess fuel. But for this you need a well-charged battery, and if you have a "weak" one, then you will not be able to dry it in this way.

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 at this moment the spark plugs are unscrewed, they will be wet, filled with gasoline, which in most cases is a consequence of a very strong enrichment of the fuel mixture in the start mode.

List of the main reasons leading to flooding of spark plugs

- Start of a hot engine on "suction".

Starting a warmed-up engine with the "suction" handle extended towards itself and a closed air damper will lead to a strong enrichment of the fuel mixture in this mode and, as a result, flooding of candles.

- The carburetor starter is defective or not adjusted.

To a greater extent, the problem concerns a cold start. It is necessary that the starting clearances "A" and "B" were set exactly, that is, there was a starting device. In addition, the PU diaphragm mechanism must have an intact, non-punctured diaphragm and have a sealed housing. Otherwise, when starting a cold engine, the carburetor air damper will not open slightly to a certain angle (this is the whole point of the PU operation), forcibly depleting the fuel mixture with a portion of additional air. The absence of such a slight opening will lead to excessive enrichment of the fuel mixture in the cold start mode and the candles will flood.

- Defective spark plugs.

"Punched" ones with black carbon deposits, with an incorrect gap between the electrodes of the spark plugs, will not be able to ignite the rich fuel mixture entering the cylinders in the start mode and will be immediately filled with gasoline. It is advisable to have a spare set of candles in order to quickly change them if necessary. can be filled with fuel, both during cold and hot start.

- Defective needle shut-off valve in the carburetor float chamber.

The needle valve of the float chamber can be leaking (either from wear or from a defect) and allow excess fuel to pass into the float chamber, which in turn again leads to an over-enrichment of the fuel mixture in the start mode. Moreover, due to a faulty needle valve, the candles can be filled both during a cold start and during a hot one. Very often, a leaky valve gives out a constant smell of gasoline in the engine compartment and fuel leaks on the carburetor. It is recommended to use a needle valve and replace with a new one if necessary.

- Pumps the fuel pump.

The gas pump can pump due to an incorrectly adjusted drive. The excess fuel pressure created by it on the needle valve will lead to overflow of fuel and an increase in its level in the float chamber, which in turn will entail excessive enrichment of the fuel mixture. It needs a drive.

- GDS air jets clogged.

GDS air jets supply air to the fuel mixture, allowing it to have the correct ratio (gasoline / air) required to start the engine confidently. A decrease in the amount of incoming air or its absence at all due to clogged air nozzles leads to a strong re-enrichment of the fuel mixture and the subsequent flooding of candles. Cm. .

- Poor volatility of fuel vapors in frost.

In severe frost, the volatility of the fuel (fuel vapors ignite at start-up) is greatly reduced. Fuel settles on the walls of the intake manifold and, getting into the combustion chambers, fills the candles. It is recommended to press the gas pedal several times before starting and wait 15-20 seconds and only then start the engine. Some drivers spill boiling water on the outside of the intake manifold and only then start the car engine.

Notes and additions

- If the spark plugs are filled with fuel, but you still need to start the engine right now, and without troubleshooting, then it is recommended to do the following. We drown the "suction", press the gas pedal all the way down and turn the engine with the starter for a few seconds. In this case, the throttle valves of both chambers of the carburetor will be fully open, the mixing chambers are subjected to strong blowing, and the candles will dry quickly. You can repeat this "purge" a couple of times with an interval of a minute (if the battery allows) and then try to start the engine again.

If one fine morning you find that your car has difficulty starting, or even the engine refuses to start at all, then most likely your candles are flooded. In this article we will try to answer the question why does it flood candles on VAZ cars, and what to do about it? The solution to this problem is quite simple and lends itself to any car enthusiast.

Causes of faulty spark plugs

Fills candles, most often, during cold weather. Especially noticeable in late autumn. Sometimes it is possible to start the engine, but it runs unstably and for a short period of time. When you try to accelerate it (press the gas pedal), it stalls for a second, and a sharp pop is emitted in the exhaust pipe. This phenomenon is dangerous, as it can knock down the ignition timing.

The first thing the driver does in this case is to check the color of the spark plugs. The threads and electrodes are in most cases covered with black carbon and are too wet - all this means that the spark plugs are flooded.

In this case, there is no dependence on what type of engine you have installed (injection or carburetor), the problem manifests itself in the same way in both engines. To determine the source of the trouble, you need to understand how the engine starts.

The process of starting the engine is as follows: the starter spins the flywheel of the crankshaft and sets in motion all the important organs of the engine. These include the camshaft, valves, and at the same time, sparks are generated at the ends of the spark plugs. During this time, the gasoline pump pumps a mixture of gasoline and air, which enters the combustion chamber. At the moment fuel is fed into the chamber, a spark is formed on the spark plug electrodes (at the correct ignition timing), which ignites the mixture and creates a small explosion, which, in turn, moves the piston inside the cylinder.

It becomes clear that if the spark does not appear, then the mixture simply fills the candle, which is no longer able to spark. Ultimately, it becomes covered with a layer of carbon, and the remnants of unburned gasoline explode in the exhaust pipe, creating an unpleasant sound that many motorists are so intimidated by. This phenomenon is associated with a malfunctioning spark plug, therefore, before looking for the problem elsewhere, you should check for the presence of a spark. To do this, you must use a special pistol.

If the candles are working, and the problem of sparking is not solved, then either a module is needed.

Another problem is the composition of the mixture. If much more gasoline enters the combustion chamber than air, then oxidation will not occur. Ultimately, the spark plug is filled with gasoline and is no longer able to ignite the mixture. In this case, you will need to adjust the carburetor. The ratio of fuel to oxygen must be within the same range. To do this, turn off or turn the bolts for adjusting the quality and quantity of the mixture.

In injection engines, everything is much more complicated. The first problem is. With prolonged operation, their sealing material begins to deform and gasoline, respectively, enters the combustion chamber even when the engine is stopped. Ultimately, the spark plug is filled, and starting the engine becomes quite problematic. The nozzles are subject to elementary replacement.

Video - VAZ injector fills candles

The second problem includes a weak ignition pulse, which is not enough to create the required ignition spark, and poor compression in the cylinders. However, such difficulties can arise when operating a carburetor motor. In this case, the engine undergoes expensive repairs.

Incorrect adjustment of the amount of air and gasoline can also affect the injection engine. Improper operation of the controller, especially in cold weather, leads to the fact that the software does not perform well the computational function and the injector supplies gasoline and air in completely incompatible quantities. As a result, the candles are filled in the same way and lose the ability to further ignite the mixture.

What if the candles are flooded?

If the candles are flooded, and starting the engine is necessary as soon as possible, then you can forget about all the above reasons and start the engine using several methods.

1. This method is prescribed by many operating instructions. For this, the spark plugs are unscrewed with a suitable wrench and dried. For drying, you can use a regular gas stove. After the candles are dry, they are wiped with a dry cloth, thereby removing new carbon deposits and screwed into place.
2. The second option also came down to us from old carburetor cars. The essence of this method is to dry the candles without dismantling them. The method works equally well on both injection and carburetor engines. The gas pedal is squeezed out completely to the stop, and the engine spins up with the starter for 10 seconds. Thus, the gasoline supply is shut off, and the engine cylinders begin to be blown with one air. During this short time, the candles have time to dry quite well. In the process of blowing it is necessary to release the gas pedal. After this action, the motor can usually be started without problems.
   
3. If all else fails, check for a spark. For this, one of the armored wires is pulled out and leans against the cylinder head by 4-5 millimeters. Ask an assistant to turn on the car starter for a short time. If a blue spark jumps between the wire and, then the candle is serviceable. However, there are spark plugs that may not work in some particular vehicle type. Try installing new spark plugs. In most cases, this method almost always works. If there is no spark, then the malfunction lies either in the armored wires, or in the Hall sensor, or in the switch itself and the ignition coil.
4. If the first start of the engine is unsuccessful, then you need to wait for a certain pause. Usually, it is 5-10 minutes. This is done in order to avoid candle flooding. As for carbureted cars, experienced drivers recommend making the first start without closing the throttle. To do this, the car is started without suction and vigorously press the gas pedal to enable it to warm up the combustion chamber. After that, the damper closes, and it is not recommended to touch the gas pedal.

These methods allow you to start the engine only when it is urgently needed. If your vases are flooded with candles quite often, then it is necessary to diagnose the fuel supply system, and, if possible, repair or adjust. Do not tighten under any circumstances, as if there is a non-combustible residue, the oil scraper rings will fail.

That's all. Perhaps the whole range of measures is listed here that will help you revive and start the engine in cold weather, even with flooded spark plugs. This event is carried out independently, so any driver should know about it.

A large number of motorists in the process of operating a vehicle periodically encounter difficulties in starting the power unit. In this case, quite often there are no obvious prerequisites in the form of clearly manifested faults. An unexpected engine failure to start can occur both during a cold start and when trying to start a previously heated one. In such cases, one of the most common reasons why the car engine will not start is that the spark plugs are flooded with gasoline or oil in the engine.

In the event that the candles are poured on or, starting the engine will be very difficult or completely impossible. This indicates the presence of certain problems both with the engine itself and with individual elements and systems. In this article we will talk about why it floods, how to understand what flooded the candles, and also what the driver should do if the car does not start, floods the candles with gasoline or engine oil, etc.

Read in this article

Why does it flood candles when starting the engine on a cold

To begin with, in the warm season, the problem of pouring candles is not so urgent compared to the cold. As a result, it becomes more common for the car to flood candles in frost. The main signs of filled candles are:

• the malfunction manifests itself in such a way that it is scrolled by the starter, but the engine does not "catch";
• from the exhaust pipe it smells of gasoline, the smell is distinct at the moment;
• after unscrewing the candles, the threads and electrodes are in gasoline, there is also a dark carbon deposit at the bottom of the spark plug;

We add that fuel filling occurs regardless of which power system is installed on a particular vehicle (an engine with injection injection or a carburetor version). The only thing, if we compare the injector and the carburetor, fills the candles on the injector in frost a little less often. Also, some features of flooding may differ slightly, taking into account the individual characteristics of a particular power system.

So, it fills the spark plugs (especially at negative temperatures) as a result of the fact that the fuel enters the combustion chamber from the power system, but the fuel does not ignite. The candles become wet, after which the further normal sparking process becomes impossible, that is, it will not work to start the engine.

As practice shows, the list of reasons for pouring candles on a cold injector or when a similar problem occurs on a carburetor car includes several main points:

Do-it-yourself tuning and modernization of spark plugs to improve fuel efficiency and other characteristics of the internal combustion engine. How to modify the candles yourself.

If you get behind the wheel, you find that the engine will not start, do not 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 may 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 become wet and this blocks the ability to start the engine normally.

Seven Reasons for Cold Candles

If you decide to start the engine, but nothing worked, and instead you find plugs 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 to start the motor may not be enough.

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 ... No wonder 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 interfere with the 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 spark 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 stock for such a case: starting the engine with cylinder purge. 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.

Prophylaxis

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 engine at high revs.