Misfires in cylinders 2 and 4 on a VAZ 2114

Among experienced car owners, there are only a few who have never encountered such a phenomenon as cylinder misfires. In practice, it looks like this: the car starts to twitch, but does not move. As you understand, there is little pleasure in this.

Previously, all engines included four cylinders. When one of them failed, the engine began to fail. That is, the engine worked only on three and four cylinders.

Today there are up to 12 cylinders on passenger cars. At the same time, the phrase “troubles the engine” still remains relevant and has firmly entered into the everyday life of drivers.

Find out which cylinder is not working

First of all, we find out which of the cylinders is not working, this is all done quite simply, one by one we remove the high-voltage wire from the spark plugs, if you remove the wire and the engine starts to work even worse (you can tell by the sound), we put the wire back on. If you removed the high-voltage wire and the engine operation did not change, then something happened to the cylinder data.

Troubleshooting

The task of diagnostics for misfires is to determine which cylinder on your VAZ 2114 has problems.

Main causes of misfires

First of all, your light comes on, signaling the need to check the engine. During diagnostics, an error lights up - P0300 .

The table provides information regarding which error code corresponds to problems in a particular cylinder.

Checking spark plugs

We unscrew the spark plugs and inspect their condition. A non-working spark plug will have black carbon deposits on the insulator of the central electrode, or even worse, there will be a crack, I had a crack on two spark plugs, so I changed 4 spark plugs at once, the price was about 500 rubles, just check the spark plugs for cracks right away, right in the store. After replacing the spark plugs my car continued to fail

What to do if it crashes at idle

This is also a fairly common situation, with a total of three causes.

1. There were problems with the fuel supply. It is necessary to flush the fuel system and clean the injectors with ultrasound.
2. There is a malfunction in the ignition system. In such a situation, it is recommended to change the spark plugs, check the functionality of the ignition coil, and install a new set of high-voltage wires.
3. Valves are not adjusted properly. You will need to adjust the valves. If the situation requires more drastic measures, then the valves will have to be changed.

Situations where the engine stalls occur in a huge number of cars. The model of the domestic manufacturer AvtoVAZ, represented by the VAZ 2114, is no exception. This is not a death sentence for your engine at all. You just need to take appropriate action quickly.

If you intervene in the operation of the unit at the first sign of “triple”, you will be able to avoid complex and expensive repairs. But when the situation takes its course and checking the unit is postponed day after day until later, get ready to soon spend a lot of money or even look for a new engine to replace the old one.

Compression measurement

Then we measure the compression.

1) Turn off the ignition

2) Remove the spark plug

3) Screw in the compression gauge

4) We are looking for a partner who will start the car

5) We start turning the engine and look at the compression

Warning: under no circumstances allow the end of the high-voltage wire to touch you or the car body when igniting.

The norm for compression is 14 atmospheres. A deviation of 3 atmospheres is permissible, that is, from 11 atmospheres, this will be the norm for cylinders.

Important nuances

If misfires occur on a VAZ 2114, this is a fairly serious problem that can develop into more serious consequences. At first the car jerks, then misfires occur, and full power is not used.

Swimming revs

It will be difficult to start the car, and over and over again the detonation noise of the air-fuel mixture will occur in the idle cylinder.

1. Cylinders can be checked using computer diagnostics. This method produces the corresponding errors in the form of codes. Using them it is already easy to determine which cylinder has problems. For example, if there is a misfire in cylinder 2 on a VAZ 2114, then the error code will look like P0302.
2. The electronic control unit, that is, the ECU, regularly monitors the operation of the power unit using the appropriate sensors installed on the VAZ 2114. In the case of misfires, the ECU estimates the rotation speed using the crankshaft sensor. If there is a misfire in cylinder 4 on a VAZ 2114, at a certain moment the crankshaft will rotate more slowly, which will be determined by the computer.
3. Modern electronics make it possible to automatically turn off a cylinder that has problems. In other words, the fuel supply to it stops.
4. The cylinder may return to operation after some time, or after the engine is restarted.
5. No more than two cylinders can be switched off at the same time. For your “fourteenth” model, two cylinders are enough to get to the garage or the nearest service station, thereby keeping the catalyst intact.
6. In early versions of the VAZ 2114, the electronics generated errors about omissions if the car was moving on bad roads. On updated versions, this problem was eliminated by installing a road surface quality sensor.
7. Misfires are not always easy to determine, since this phenomenon is not constant and can occur periodically on the VAZ 2114.
8. Car owners often make mistakes in winter, when the engine starts to throttle when warming up, and then, when warmed up, it works normally. This phenomenon occurs due to wear on the cylinders, since when warmed up the metal elements expand and the system returns to normal operation.
9. If the VAZ 2114 engine runs normally at idle, but when the load increases, it starts to stall or operate unstably, the cause should be sought in a burnt gasket. Because of this, pressure increases inside the combustion chamber and a leak occurs.
10. When the engine coughs a little, but soon returns to normal operation, it becomes difficult to determine the cause. This will require a full diagnosis.

Article on the topic: All about malfunctions and replacing the reverse sensor on a VAZ 2114

Other reasons

If you notice that the VAZ 2114 engine is having trouble with the injector, then it may also happen that the spark plugs turned out to be working properly. The cause of the malfunction in this case may be in the vehicle's fuel supply system. Among the reasons may be a malfunction of the injector or its electrical part, clogged injectors, the use of low-quality fuel or fuel system cleaners. In this case, you need to do computer diagnostics of the car and find the fault.

It is rare, but it happens that a car owner, after some other repair, puts on the high-voltage wires incorrectly (mixes them up) and then the car not only begins to show signs of the described malfunctions, but will not start at all, which is very disappointing. It would be a good idea to check this; this is what experts advise to do.

VAZ 2114 ENGINE CHARACTERISTICS

The VAZ 2114 car is mainly equipped with an 8-valve 4-cylinder engine, the fuel system and ignition are controlled by an electronic unit (ECU). The electronics have many different sensors that inform the unit about the condition of the engine. The control unit, in turn, reads the necessary information and gives commands to those devices that directly affect the operation:

1. Distributes the spark among the cylinders in a certain order;
2. Determines the required amount of supplied fuel (leans or enriches the fuel mixture depending on the number of revolutions).

What can multiple misfires lead to?

Single misfires are just a signal to the owner of a VAZ 2114 about problems with the engine.

Numerous accidents have the following consequences:

1. As a result of misfires, unburnt fuel will enter the catalytic gas reduction system. Because of this, the converter overheats and fails.
2. With repeated passes, some of the gasoline will enter the lubrication system through the walls of the idle cylinder. Oil diluted with gasoline will lose its properties and will not be able to provide high-quality lubrication of loaded engine elements.
3. All of these factors can lead to engine failure and the need for costly repairs.

Error p0300, p0301, p0302, p0303 and p0304 causes

Unfortunately, the diagnostic tool has not learned to determine the specific cause of the failure and, in this case, misfire in the engine cylinder, but, fortunately, the most likely malfunctions can develop in two directions - either there is nothing to burn , or it is impossible to ignite . Although it is still too early to rejoice at the possible quick search for the cause of error p0300, since it could be:

Cylinder misfires. How to diagnose the cause.

1. In the ignition system

• spark plug failure;
• breakdown of a high-voltage wire;
• faulty ignition coil (or module);
• other reasons related to wiring and connectors in the ignition system.

• In the power system
• poor quality fuel;
• clogged injectors;
• heavily contaminated fuel filter;
• low fuel pressure.
  The main reasons why error P0300 occurs

  Engine trouble: what is it, and what are the signs to identify this malfunction? You can understand that the internal combustion engine is malfunctioning by the following signs:

• At idle speed, the engine operates unevenly, jerking periodically;

The car does not develop the required power when driving;

• The car drives jerkily, when you press the gas pedal, there are gaps in operation;
• The exhaust from the muffler is uneven, with interruptions, pops and shots are possible;
• Fuel consumption increases.

Increased fuel consumption hurts your pocket Reasons:
There are many reasons why the engine misfires. There are such nuances that even experienced technicians do not immediately determine the nature of the malfunction. But the most common cylinder failures are the following (starting with the elementary ones):

• The candle does not work;
• The high-voltage wire is broken;
• The ignition coil has failed;
• The control unit is faulty;
• There is an air leak in the intake manifold;
• Exhaust valve burnt out;
• The cylinder head gasket is broken;
• The compression rings on the piston are broken,
• The piston itself has burned out, or the bridge on the piston between the compression rings has burst.

This article is about the VAZ 2114 car, so carburetor malfunctions are not considered, since this device was not installed on the 2114 model. This brand of car has a fuel system with distributed injection (injector), and the answer to the question of why the engine stalls may be hidden in this system.

The cylinder does not work on the VAZ 2114 Auto-help

If the engine on a VAZ 2106 runs intermittently, you will easily notice it. At idle, the engine will run unevenly and fuel consumption will increase significantly. And on the road there will be a very noticeable decrease in the power of the power unit. There are the following possible causes of the malfunction:

• broken carburetor adjustment
• burnt candles
• abnormal cylinder operation
• loss of tightness in the air supply system.

The following guide will help you diagnose and fix the problem.

Occurrence of misfires

Misfire itself is common in all four-stroke engines, from the oldest to the most modern.
In this regard, they are very often found on any one cylinder, so only 3 cylinders remain in operation. This phenomenon, well known to many drivers, is called a triplet. In this case, the engine operates unevenly, with frequent jerks, and the overall power drops by more than a quarter. In addition to malfunctions on one cylinder, there are also misfires in cylinders 1 and 4 of the VAZ 2114. This situation is much more critical and requires an immediate solution.

If you notice a misfire in your car, you should stop driving it and have repair work done as soon as possible. It is impossible to continue operating such a vehicle without troubleshooting, since initial starting problems can develop into constant jolts caused by fuel detonation and even engine failure.

Speaking about the steps, it is important to note that sometimes motorists mistake completely different malfunctions for ignition system malfunctions, namely:

• start the engine due to low fuel level.
• easy release of the car after starting in the cold season. This is not caused by ignition errors, but by cylinder wear. After starting, the cold elements of the engine begin to heat up and, as a result, expand. It is these changes in size that cause “trimming”;
• intervention of the machine with a strong supply of “gas” to a minimum. This phenomenon is also caused not by poor ignition, but by damage to the cylinder head gasket, which causes a leak;

Therefore, in order to accurately determine the cause of triplets, it is better to carry out a diagnosis - this will help you safely discard false versions and immediately begin troubleshooting.

Diagnostics without a computer

If you do not have a scanner, and most likely this is the case, and there is no desire to contact a car service, then the causes of misfire can be identified using the so-called old-fashioned methods.

They need to be checked first; they must be dry without soot and oil.

If the spark plug is flooded, then ignition will not occur in this cylinder, and if it does, it will be misfired. The spark plug gap must be correct.

A common situation is that the wire just fell off. Also, the wires may be broken, damaged, or oily.

Remove the cap and conduct an external inspection of the wires, especially their contacts, to see if they are oxidized.

Check the resistance of the wires; read how to do this above. The resistance should be no higher than 10 kOhm and no lower than 3.5 kOhm. Replace the wires if necessary.

Diagnostics

The first signal of problems with the engine is the lighting of the Check Engine indicator on the instrument panel. If the car has a standard on-board computer, then you can read the ignition system errors on it. But it is not able to show the operation of the device in real time, so a more accurate way to determine the fault code is a diagnostic tool that is connected to a special connector.

Regardless of the type of equipment to check, there are several main error codes that occur when a VAZ 2114 misfires:

• P0300 - a general problem in the system, the presence of numerous misfires on all cylinders;
• P0301 - malfunction of the spark plug of the first cylinder (cylinders are counted from the unit drive pulley);
• P0302 - problems with the functioning of the second cylinder;
• P0303 - problem in the third cylinder;
• P0304 - malfunction of the fourth cylinder.