The latest Lada model
Despite the streams of criticism, the Priora is perhaps the most successful VAZ car in recent years. It is quite dynamic and comfortable, but from time to time it presents its owners with small problems. The most common problem is that the engine idles when cold and then overheats. That is, when you start the car in the morning, it starts to work intermittently, and uniform dull sounds are heard from the exhaust pipe.
Another factor is the strong smell of unburnt gasoline from the muffler. Engine vibrations increase, which the airbag may not be able to cope with, so they are transmitted to the body and cause discomfort. The reason for all this is that one of the cylinders is either firing unevenly or not firing at all.
Signs of engine tripping
If the Priora’s engine starts to stall, it’s hard not to notice; the car will show the following signs of a malfunction:
- Loss of vehicle traction;
- Gases will come out of the exhaust pipe unevenly, and small pops will be heard;
- On the dashboard, the “CheckEngine” lamp will initially flash, and then remain on. The engine control unit will record an error about misfire in a certain cylinder.
- The engine will take longer to start or you will need to press the gas pedal to start the engine;
If your car shows such signs of malfunction, then most likely one of the cylinders in the car is not working.
Causes
The LADA PRIORA engine has problems with the 16 valve injector for various reasons. To find out the specifics, the motorist needs to know the design features of the power unit, as well as have some vehicle repair skills.
Lada Priora 16 valves.
So, LADA PRIORA has 16 valves and a triple engine, what could be the reasons for the effect:
- Poor quality fuel.
- Malfunction in fuel supply elements.
- Malfunction of air intake units.
- Malfunction in the ignition system.
- The problem lies in the electronic part of the car.
Why does the engine troit?
Engine trouble occurs for several reasons, and sometimes these reasons together can cause the failure of any of the cylinders.
Causes:
- Injectors;
- Spark plug;
- Ignition coils;
- Hydraulic compensators;
- valves;
- Compression;
All of the above details are ways to influence engine tripping. Let's look at each of the reasons in more detail.
Spark plug
Most often, the engine may stall due to worn spark plugs. Since spark plugs are installed in the combustion chamber and are exposed to high temperatures, they often fail, which leads to misfire in the cylinder in which the spark plug failed.
If your car has misfires, the first thing you need to do is check the spark plugs, and it is best to replace them with new ones.
Ignition coil
To provide the engine with a spark, Priora uses individual ignition coils for each cylinder, that is, the ignition coil is installed directly on the spark plug.
Since the ignition coil is made of plastic, exposed to high temperatures over time, its insulation cracks, which leads to breakdown of the insulation and leakage of the spark to the engine body. Also, at high temperatures, the coil winding can melt and short-circuit, which leads to coil failure and, consequently, misfire.
Injectors
Fuel injectors, as well as spark plugs, are installed near the combustion chamber and supply fuel through valves into the chamber. When the injector becomes dirty, the fuel supply to the combustion chamber is not supplied in the required volume or is not supplied at all, this leads to misfire.
Hydraulic compensators
In the Priora, namely the 16-valve engine, instead of shims on the valves, there are hydraulic compensators that adjust the gap between the camshaft and the valve automatically using oil pressure. With high mileage, cars have problems with the operation of this part; the hydraulic valves begin to knock and soon cannot open the valve at all, which leads to misfires in this cylinder.
valves
Sometimes it happens that the valves are to blame for engine throttling, namely, when a valve burns out, a small dimple appears in it, which allows compressed gases to pass through, which does not allow the mixture to ignite normally. For this reason, misfires may occur in the Priora engine.
Compression
With high mileage, the car engine wears out and thereby loses its compression. As in the case of valves, the gases are not compressed enough, thereby not forming a good fuel mixture.
Ignition system
One of the options for why the tripping occurred is a problem with sparking. So, failure of a spark plug or one of the high-voltage wires leads to the fact that the engine begins to stall. Therefore, it is necessary to diagnose these elements for operability.
Electronic problems can also cause tripping.
Another structural element that needs to be checked is the injector, since the problem may be hidden in this element.
Last but not least, the electronics are where faults occur. So, a problem with sensors or the electronic control unit of the power unit can cause tripping.
To carry out repair and diagnostic operations, you will need not only standard tools, but also a diagnostic laptop PC, as well as a cable connecting to the ECU - K-line.
After connection and synchronization, you can determine what errors exist, or perhaps one of the sensors responsible for the normal operation of a particular node has failed. After the repair, it is recommended to reset all accumulated errors.
Troubles when pressing the gas pedal sharply
When the Priora engine stalls when the throttle is opened sharply, this indicates a breakdown of the insulation of the individual ignition coils. The IKZ has rubber seals that isolate the cap of the coil and spark plugs, thereby preserving the spark from breakdown; when this cap wears out or is damaged, the spark can go to the engine body, thus, when the gas pedal is pressed sharply, it will pierce the body, which is why the internal combustion engine will triple.
High voltage wires: check
Often the engine starts to misfire, and not only when it’s cold. This can happen even at speed due to faulty high voltages. You need to examine the operation and functionality of the wires in the following order:
- disconnect the wires from the ignition coil and spark plugs;
- take measurements of high-voltage circuits using a special tester;
- when the device shows that one of the wires is faulty or visual defects in the integrity of the part are visible, it will certainly need to be replaced.
Experienced car mechanics recommend replacing not just one wire, but using the entire set to ensure uninterrupted engine operation.
Supply system
If the Priora engine (16 valves) is tripping, the reasons may be trivial. When there is no flash in the cylinder, perhaps there is simply no fuel there. If it has a normal compression ratio, it is worth diagnosing the power system. You should pay maximum attention to the air filter and the pipe. It is necessary to make sure that the clamps are securely tightened, whether the purifier body itself is intact, and whether there is any air leakage from the outside. Also pay attention to the tubes. They must be tightly secured to the throttle assembly. Fuel leaks, cracks, and broken plastic may indicate that some parts are faulty.
What to do when the Lada Priora engine troits
Do-it-yourself Lada Priora engine repair depends on the cause of the malfunction:
- If combustion of the windings of the injector elements is to blame, remove the cover and then pull out the manifold. Assess the condition of the windings and measure the resistance using a multimeter. The optimal resistance level is from 11 to 15 Ohms. If the value is lower, the winding must be replaced.
- If the resistance shows normal values, remove the fuel rail and rinse each part thoroughly with water. But you should not tackle a defect in this category if you do not have the skills to repair it - be extremely careful. For flushing to be successful, open the valves leading to the nozzle, and then apply the flushing agent under pressure in the form of an aerosol.
- If you doubt the quality of the fuel, completely drain the old fuel and fill the engine with 8 or 16 valves with 95-grade gasoline. A high octane number does not make sense; on the contrary, this option may lead to overheating of the engine. If replacing gasoline does not help, then change the air and fuel filter units.
- How to check if a spark plug is working properly? It’s very simple - let the car cool down thoroughly, otherwise, when you start unscrewing the elements, you may get a severe burn. After turning off the ignition after a few seconds, the faulty spark plug will be wet from gasoline. Also see if the spark plug can produce a spark.
If the spark plug cannot be repaired so that the engine stops running, it is completely changed, and it is not necessary to contact a service station. Armed with a 10-12 key, turn off the elements responsible for the ignition. Then thoroughly clean the spark plug from dust, otherwise debris may get into the Lada Priora engine.
A tire compressor is suitable for this procedure; in extreme cases, a brush. Then remove the spark plug with a spark plug wrench, where the head with the gasket must be fixed. New devices are installed with the same screwing.
Diagnostics of spark plugs by plaque
When the engine starts cold or hot, you can check the carbon deposits on the spark plugs. If the coating is white, then this indicates a lean mixture and overheating of the engine. A black tint indicates a rich mixture. In both the first and second cases there are problems with the operation of the electronics. This is either installing new firmware, or replacing the ECU. A normal candle has a brick color. By the way, the engine may stall at idle if the part is damp. This also significantly increases the warm-up time. In addition to the spark plugs, the ignition coil may also be acting up. Priora (8 valves) is equipped with distributor ignition. Overheating of the coil is often observed. You can restore the operation of the motor by simply replacing the element.
Trouble the engine: why is it dangerous?
This is a rather critical phenomenon, especially if the unit begins to vibrate during acceleration.
This behavior of the engine is especially dangerous when the driver decides to overtake, but there are cars in the oncoming lane. In the process, while the motor is running, the engine power is significantly reduced. The compression ratio decreases - there may not be enough dynamics to successfully complete the maneuver.
Considering that the Lada Priora has been manufactured since 2007, there are often instances where the engine knocks like on an old car 20 years ago. This is an engine running on three cylinders. It may have the latest firmware, but if the engine of a Lada Priora car is running rough and the check light is on, then such a car will not have much life left.
Ignition
But it may turn out that when you unscrew the spark plug, you will see that it is wet. This indicates there is no spark. As a result, fuel combustion does not occur. The ignition is checked in the following order:
- First, let's visually evaluate the candle. It should be brown-sand color. If it is darker, then it may be faulty. It is advisable to check it on a special stand. The spark should be blue and white. If it is yellow or red, then this is a bad sign. You can, of course, try to clean it with sandpaper, but this may not bring the desired effect;
- Try using another spark plug and check how the engine runs. If everything returns to normal, then the cause has been found. Also check the high voltage wire;
- After this, check the ignition coil. It is the weakest ignition part in the Priora. To check, we reset errors from the ECU. And with the ignition off, they swap the supposedly non-working ignition coil with the obviously working one. The engine starts for a couple of minutes. The diagnosis is repeated. If the flash miss “migrated” along with the coil, the problem is in it. Replace it with a new one.
Source
Air filter: check
So, the spark plugs and wires turned out to be in good condition, but the engine continues to stall, which means the next step will be checking the air filter. Sometimes this part simply becomes clogged, resulting in less air entering the engine. This is what causes the breakdown. Experts say that cleaning the filter is pointless, since the cost of a new one is quite reasonable.
Thus, Priora car owners, after performing the indicated manipulations, generally manage to solve the problem with the engine. In addition, repair work is carried out simply. However, if difficulties arise during these events, it makes sense to turn to training videos on the Internet, which were recorded by real masters of their craft.
