Despite the huge amount of criticism against the Lada Priora, this is one of the most popular cars that have come off the AvtoVAZ assembly line in recent years. "Priora" is equipped with a fairly successful engine with good dynamics, the interior turned out to be very comfortable. And in the maximum trim levels useful options are offered. But at the same time, from time to time, the car brings minor problems to the owners. One of the most popular malfunctions is the Priora engine (16 valves). The reasons for this phenomenon are rather unpleasant. And besides, the motor overheats as a result.
When a driver starts his car in the morning, the engine does not run smoothly, as before, but intermittently. From the exhaust pipe at this time, deaf sounds are heard. At the same time, a persistent and strong smell of unburned fuel is felt. Vibrations are constantly growing, and this is fraught with cracks in the pillows. So
Troit motor: why is it dangerous?
This is a rather critical phenomenon, especially if the unit begins to vibrate during acceleration.
This behavior of the motor is especially dangerous when the driver decides to overtake, but there are cars in the oncoming lane. In the process, while the engine is troiting, engine power is significantly reduced. The compression ratio is reduced - 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 a three-cylinder engine. The latest firmware may be installed, however, if the engine is troiting on a Lada Priora car, then such a car does not have much time left.
Typical causes and safety precautions
It is worth considering that there are a lot of possible reasons why one of the cylinders is turned off.
Some faults can be identified and eliminated even without material costs. Others are diagnosable. As a result, it may be necessary to replace the motor or overhaul.
Supply system
If the Priora engine is troiting (16 valves), the reasons may be commonplace. When there is no flash in the cylinder, it is possible that 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, that the body of the cleaner itself is intact, and that there is no air leakage from outside. Also pay attention to the tubes. They must be tightly fixed on the throttle assembly. The fact that some parts are faulty can be reported by fuel smudges, cracks, broken plastic.
Nozzle breakage, clogging
When the Priora engine troit (16 valves), the reasons often lie in the nozzle.
It may be faulty or simply clogged. Often, beginners and lovers of pouring various cleaning liquids for injectors into the tank face such a problem. All this leads to the fact that the dirt first exfoliates in the tank, then in the fuel line. And as a result, it will fall into the nozzles, where it will safely get stuck.
Winding nozzles
It can not only become clogged with dirt - often the windings of the elements burn out on the Priors. In this case, the situation is easily restored with your own hands. The cover is removed, and then the manifold. Next, the injector windings are checked. Using a multimeter, measure the resistance of the windings. It should be around 11-15 ohms. If the indicators are less, the element should be replaced.
How to troubleshoot injectors?
If the resistance is normal, then it is recommended to completely dismantle the fuel rail and thoroughly rinse every part. Do not perform this operation if there is no experience in this work. For flushing, the nozzle valves must be opened. Then apply an aerosol wash under pressure. It's not difficult, but without experience you can ruin everything.
Poor quality fuel
This is one of the possible reasons why the engine troit at idle or while driving.
To return to normal operation, you can try changing the gas station. This usually helps to correct a lot of misunderstandings. It is better to fill the 16-valve Priory engine with good 95th gasoline. Pouring something with a higher octane rating is not worth it. This will only lead to overheating. You can also try replacing the filters - air and fuel. Sometimes this solves the problem.
Ignition system
An experienced car enthusiast who has encountered a three-cylinder engine immediately begins to diagnose candles. "Lada Priora" should cool down well, otherwise there is a risk of getting burned when unscrewing. If after a few seconds you turn off the ignition and check the candles, then one of them will be wet with gasoline. It is also recommended to separately check each part for the presence of a spark.
In the event of a malfunction, the problem is solved. Sometimes it is enough to press down the potentially faulty one with a cap - the machine will resume normal operation. In general, the ignition system in this car is the most problematic part. If the Priora engine is troiting (16 valves), the reasons can be looked for for a very long time, and the diagnostics will not give anything, even if it is done correctly. And only by replacing all the elements you can come to a positive result.
Diagnosis of candles on the fly
When the engine is cold or hot, you can check. If the coating is white, then this indicates a lean mixture and engine overheating. A black tint indicates an enriched mixture. Both in the first and in the second case there are problems with the operation of the electronics. This is either installing a new firmware, or replacing the ECU. A normal candle has By the way, the engine can triple at idle if the part is damp. Also because of this, the warm-up time is significantly increased. In addition to candles, the ignition coil can also act 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.
Checking the ignition coil
There is simply no special method by which you can check the operation of parts. The instructions for the car indicate one of the ways to self-diagnose. So, with the ignition off, they check whether the ignition coil (Priora is no exception) is firmly fixed to the motor.
Then they look at the reliability of electrical connections in the low-voltage circuit. If everything is in order, then check for the presence of a spark. For this, they are removed. A test plug is inserted into the tip and pressed against the metal part of the engine. Next, turn the starter. If there is no spark, the coil is changed. If there is a flash, but the engine does not start, change the candle.
Controller
Because of the controller, the engine is also unstable. You can find it right in the car. Often the microcircuit in the device burns out or it is flooded with liquid from the heater. Sometimes water from the street gets into the cabin after a good rain.
If we talk about restoration, then with certain skills, self-repair is possible. It is recommended to contact the service station or buy a new unit. In addition, firmware can only be performed with special equipment.
Summary
So, we examined why the car troit. These are not all possible reasons, but they help to accurately diagnose the operation of the motor and find a malfunction.
The ignition coil, which is found in the car, inherently converts the low voltage from the battery and alternator to high voltage to supply it individually to each spark plug. Roughly speaking, this is such a miniature electrical transformer, the moment of failure of which is almost impossible to predict, and it is necessary to carry out repairs and diagnostics already on the failed device. Below in our article we will tell you in detail how to check the ignition coil for the VAZ-2112 with your own hands.
The video describes in great detail the algorithm for checking the ignition coil on the VAZ-2112:
Ignition coil device
It is known that on 8-valve engines an ignition module (, diagnostics) was used with two channels and coils that are capable of transmitting a spark to a pair of candles at once. However, on for each spark plug.
Prices and articles
Ignition coil from a Russian manufacturer SOATE for VAZ-2112 has an article number 2112-3705010-12 and stands in stores within 1 000 rubles. Analogues from Bosch may cost twice as much, but the quality of these parts is much higher. In any case, the choice is always yours.
Ignition coil from Bosch.
The process of checking all ignition coils on the VAZ-2112
The VAZ-2112 engine with 16 valves uses individual Bosch ignition coils and in order to check them, the following procedure must be followed:
Despite the fact that many people on the network talk about the impossibility of checking the coil with their own hands, however, it is possible to check it only by knowing their initial values, which are measured in OM Oh.
When the readings on the primary winding on all coils are correct and show their values, we proceed to check the secondary winding.
conclusions
Thanks to such a simple procedure of work, it is possible to check the performance of the ignition coils on the VAZ-2112 with your own hands in the shortest possible time without resorting to the help of special diagnostic stations and specialists.
74 75 76 77 78 79 ..Checking the ignition coil and its circuits Lada Priora (VAZ-2170)
To check the operation of the ignition coil, we relieve pressure in the engine power system and do not replace the fuel pump fuse (see. "Replacing the fuel filter"). Remove the ignition coil (see "Checking the condition and replacing spark plugs"). We insert a known-good spark plug into the rubber tip of the coil and connect the block of the wiring harness of the engine control system to the coil.
We place the candle on the cylinder head cover ...
... so that there is contact between the side electrode of the spark plug and the "mass" of the engine.
To avoid electric shock when cranking the crankshaft with a starter, do not touch the spark plug and coil tip with your hands, but hold the coil by its plastic housing. ... a spark should regularly jump between the electrodes of the candle.
The assistant, turning the key in the ignition switch to the "starter" position, turns the crankshaft.
With a working ignition coil and its circuits ... 
If this is not the case, it is necessary to check the power supply and control circuits of the coil. To check the power supply circuit of the coil, disconnect the block of the wiring harness of the engine control system from it ...
If we compare the ignition systems of all VAZ models with rear-wheel drive and Priora, then their big differences immediately become noticeable. One is installed on the "classic", and the ignition distributor gives out high-voltage voltage to the candles. There is a coil on each cylinder, the electronic control unit is responsible for distributing the voltage across the candles.
DEVICE AND PRINCIPLE OF WORK
Probably, all drivers understand that the main purpose of the high-voltage coil was and remains the same, it is to set fire to the air-fuel mixture. For this, a high voltage is generated in it, the value of which is about 40 thousand volts.
It is a transformer that raises the low voltage of the battery to high. The transformer consists of two windings, one of them is primary and the other will be secondary, which are wound with copper wire on an iron core.
The primary winding is wound on the core, and the “secondary” is wound on top of it. The whole structure is covered with a casing. If the low-voltage winding has only about 150 turns, then the "secondary" already has several thousand.
There are no high-voltage wires, as it is worn directly on the candle. When at the right moment an impulse is received from the engine control unit to the "primary" coil, a magnetic field is excited around the core, which contributes to the emergence of high voltage in the "secondary". The candle in this case plays the role of a spark gap, which ignites the working mixture in the engine cylinders. The coil has a protective shell, and inside it is additionally installed a spring and a diode, which is designed to quickly cut off high voltage pulses.
ABOUT THE SIGNS OF FAULTY COILS
The ignition coil on the Priore, in the event of a failure, immediately lets the driver know about his “disease”. This will be evidenced by such manifestations:
- Violated, it has vibration, traction is reduced, drivers say that the motor is "troit";
- Jerking of the car during acceleration or when driving in low gears;
- There are cracks or breaks in the insulation.
The first point may also indicate broken spark plugs.
HOW TO CHECK THE COILS
In any case, checking the ignition coil on the Prior always begins with its external inspection. Even very small cracks or tears in her elastic bands are not allowed. Their presence indicates the replacement of the device. Cracks, chips and other damage to plastic parts indicate that the coil was overheated, and it could simply “burn out”. Next, an inspection of the internal parts is carried out, especially the spiral, its location. If the inspection did not reveal visible defects, proceed to further verification.
There are several ways to check the ignition coil, which will be discussed below. During the operation of the machine infrequently, but it becomes necessary to check it. To do this when there are no obvious signs of failure is not so easy without special equipment such as a spark gap or an oscilloscope. Let's look at an ignition coil without instruments. To begin with, you can look in places and see how the motor will behave after that. If the interruptions have moved with the coil, it means that there is a malfunction in it, it must be replaced.
You can check the high voltage ignition coil directly on the machine. To do this, you need to remove it from the motor, insert a working candle into the high-voltage terminal, with the ignition on,. A good coil will show itself as a spark on a candle . In this case, it is necessary to beware of high voltage and use protective equipment.
In vehicles that have installed, the system will report problems in the cylinders with a signal in the form of numbers from 0301 to 0304, where the last digit indicates the number of the "problem" cylinder. It remains only to figure out who is to blame, the coil or the candle.
INSTRUMENTAL CHECK OF THE COIL
After visual inspection and control, you can proceed to check using measuring instruments. It is best to use digital multimeters for these purposes, or devices such as MD-1 or AZ-1. They can be freely bought, they are low. Now let's talk about how to check the ignition coil on the Priore using instruments.
Before checking, the device must be removed from the engine. This can be done in this way:
- Disconnect battery terminals;
- Remove the protective plastic casing from the engine;
- Squeeze the latch with your fingers and disconnect the connector with wires;
- With the key on “10”, the fixing bolt is unscrewed and the coil is removed from the mounting socket.
We unscrew the coil with a key - everything is simple! (naturally ICE 16 valves, a coil with candles in the well) Now you can start checking the devices. First you need to check and calibrate the measuring device. To do this, set the measurement switch to the position for measuring resistance at “200 Ohm”, and close the probes together. The reading should be close to "0". These indications must be memorized or recorded. They may come in handy in the future. The device is calibrated, you can start testing. Checking with a multimeter is carried out in this order:
- Both probes of the device are connected to the coil connector (polarity is not necessary) and the resistance of the primary (low-voltage) winding is measured. Pinout of contacts for measurement 1 and 3, the measurement limit of the device is "200 Ohm". It should show approximately 0.8 ohms. The indicator obtained during calibration is subtracted from this value, and the true value of the winding resistance is obtained. If there is no indication, you need to check the reliability of the contact of the probes and the coil leads. If after several attempts the readings do not appear, it means that there is a break in the primary winding, and it must be replaced;
- The next step will be to check the high voltage winding. Set the resistance measurement limit to 2 MΩ. In this case, polarity must be observed, since the high-voltage winding. Therefore, the red probe is inserted into the output of the coil, and the black one is connected to the output of connector number 2, it is the middle one in the block. The device should show approximately 342 kOhm. It should be taken into account the fact that the readings of the device are highly dependent on the heating of the coil. It is best to test on a cold coil. In this case, it is also necessary to achieve good contact between the instrument probe and the high-voltage terminal. If the readings are close to infinity, a replacement part is needed.
A little about whether it is possible to repair the ignition coil. It will not work to restore the primary or secondary winding, but even novice drivers can replace the tip on it. To do this stock up:
- New tip:
- New sealing ring;
- Degreaser;
- High temperature silicone sealant.
The tip installation site is cleaned and thoroughly degreased. The skirt of the new tip must be turned inside out and a small layer of sealant applied to it. While it dries a little, a new o-ring is installed. Next, you need to install the rubber tip in its place. This will complete the repair.
A FEW WORDS ABOUT THE SELECTION OF COILS
According to experts and owners, the ignition coil on Priora is best suited for BOSCH. It costs about 1500 rubles, but it's worth it. Such products are sold necessarily in individual yellow packaging. The original coils of this company are able to last more than 100 thousand kilometers.
