VAZ-2110 malfunctions: no spark. 8 valve injector: possible causes of the problem

Hi all. It was like this. I was driving and suddenly stalled, checked there was no spark. They brought him home and started treating him.

I checked the module with a multimeter and everything is fine. I checked the voltage on the chip from the ECU to the 12 volt module with the ignition on. And on the distribution wires when cranking there is 0 volt. The crankshaft sensor was changed, all the wiring was fine and the fuses were fine. The relays are all working. I even changed the ECU.

There was one moment. I checked the spark directly from the battery. I threw a wire onto the module. A spark struck. I checked the car and it started. But not for long and that’s it again. No spark. I also changed the pulley. Any thoughts?

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As I understand it, everything fits together on the ignition module. If the MZ does not produce a spark, it means either it is faulty or there is something wrong with its connection. Check the wire connection block and the wires themselves again, especially at the bends (where the wire inside the braid breaks).

You need to check using a diagnostic scanner whether the ECU sees engine speed when trying to start it, i.e. check whether the crankshaft sensor is working correctly. And it's worth checking the voltage at the fuses.

How can you check the MH with a multimeter and conclude that everything is normal with it? ))))

Is there 12 volts on the MZ when the ignition is turned on relative to what, ground (body, terminal) or was the minus taken from the MZ connector?

“And on the distribution wires when scrolling, 0 volts” There, the pulse duration may be too short for your multimeter to measure it. The oscilloscope rules, at worst an LED with resistance.

When you turn the key, does the fuel pump operate as usual or is there something unusual? Is the immobilizer active or disabled? Is there an injection? Are the spark plugs wet after cranking? Does the check light come on when you turn on the ignition?

Many car enthusiasts have encountered the loss of spark on the 16-valve VAZ-2112 engine. What is this defect associated with? The first thing that suggests itself is the ignition. But, in this case, not everything is so simple, since the problem may lie deeper than it seems at first glance.

The video describes a situation when you lose a spark on the road and the car does not start:

Possible reasons for absence

Most modern cars are equipped with many sensors. They make the life of the car owner easier and complicate repairs. In the electronics responsible for the operation of an injection engine, there are several sensors responsible for the spark formation process. But the reasons that there is no spark (VAZ-2110, injector, 8 valves) may also lie in other components. There are several types of possible breakdowns. The first includes various problems in the car’s fuel system. This includes malfunctions in which fuel cannot enter the cylinders or the supply is interrupted.

If there is no spark (VAZ-2110, injector, 8 valves), then this may be due to the fuel system. Often the pump relay or the submersible element itself fails. The test is performed by ear.

Then there are problems related to the electrical part. These are some of the most common faults. In case of such breakdowns, no electric discharge reaches the spark plug. Naturally, the mixture will not be set on fire. Global problems include complete engine failure and timing belt breakage. It is not worth dwelling on these malfunctions in detail.

Some useful recommendations

If one fine morning the owner of a car gets behind the wheel, but cannot start the car, do not despair, let alone panic. You must try to find the cause and make an accurate diagnosis of your sick iron horse. The cause may be a dead battery. It happens that a motorist forgot to turn off the headlights and the car stood there all night with the headlights on. Of course, it is possible to leave, but it is clearly impossible to do without outside help. It is necessary to find out whether the starter rotates. If yes, what is their intensity? It may be that the starter does not turn or click at all. So it just broke down. Then you’ll have to take another car; you’ll hardly have to go anywhere with this one. Of course, the problem may lie in the battery. In the simplest case, the terminal may simply fall off. Then you should tighten their fastening. You can try to leave by starting the car "with a push". But if the car has an automatic transmission, you don’t even have to try to do this. Nothing will come of this. The same applies to electronic fuel injection.

In such a situation, you can try to “light” a neighbor, but on some cars this can damage the on-board computer.

If the starter operates in vigorous mode, but the engine does not start, the battery should not be blamed for this. Most likely the problem lies in the fuel supply or ignition system.

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Stage one

Typically, the symptoms of the problem are as follows: the starter rotates properly in its standard mode, but the engine does not want to start. One of the most likely causes is a fuel pump that does not start. By the way, on injection “tens” it is submersible and is placed directly in the tank.

You can check the element by the presence of operating sound. Turn on the ignition - there should be a hum in the area of ​​the rear seats. Sometimes he is missing. In this case, you should check the fuses. The VAZ-2110 is an injection car, and the fuse box is located on the side of the center console on the front passenger side. It is necessary to unscrew the fasteners, then remove the cover, check the fuses for functionality and, if necessary, replace them. If the elements are fully operational, then you need to check whether the relay will turn on, both the main one and the fuel pump. You can feel the moment of switching on with your finger. A characteristic click will also be heard.

If the fuel pump is operational, use a pressure gauge to check the presence of fuel in it. If there is no pressure gauge, then press the spool at the end of the fuel rail. This element may be contained in a protective cap. The pressure will be quite noticeable, although its power cannot be determined. A running pump and no pressure may indicate an obstruction in the fuel line. This may be caused by a clogged fuel filter.

If the Priora does not start well when hot

In this case see

second table, in addition to the reasons described, also pay attention to:

1. A pressure regulator that can discharge fuel through a membrane into the receiver.
2. DPKV contacts, if the sensor has been changed, check that the poles are connected correctly.
3. Faulty ignition module.

Let us remind you that in some cases the Priora does not start due to a faulty immobilizer or alarm system. In some cases, reflashing the engine ECU (electronic control unit) helps solve the problem of poor starting. And regular car maintenance will help eliminate problems of poor engine starting.

Keywords: Lada Priora engine | ignition system for Lada Priora | starter Lada Priora | power supply system for Lada Priora | ECM Lada Priora

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Stage two

If there is no spark on a VAZ-2110 (injector, 8 valves), then the spark plugs are often the cause. Naturally, they are checked if the fuel pump is working. It is best to use a spark gap for testing. If the current is distributed over two spark plugs, then there will definitely be a breakdown to ground.

It is possible that the wire to the ignition coil has broken or there are breaks in its winding. If a VAZ-2110 car does not have a spark (injector, 8 valves) on two wires, then the reasons may be a non-working ignition coil or controller. In two cases, there is a possibility of high-voltage wires breaking. This option is worth checking first. Look at the resistance level. Normal values ​​are up to 200 kOhm.

Diagnostics using ODB-2 scanner

Since there are quite a few reasons for the lack of a spark, it is first recommended to carry out a comprehensive diagnosis of the car. A quick way to do this is to use an ODBII scanner.

The main feature of Scan Tool Pro is the diagnosis of not only the engine, but also other components of the car (gearbox, abs, transmission, air conditioning system, etc.). The device works with all models of the domestic automobile industry (since 1993 for gasoline cars and 1996 for diesel cars) and was created specifically for the CIS market - it shows error codes with their interpretation in Russian. The scanner also displays the operation of all available sensors in real time, the vehicle’s VIN, its actual mileage and much more.

Ignition module and coil

Here you can check the error codes that are in the car's memory. If the ECU does not have a diagnostic function, you should install a known-good module.

You can find out why there is no spark on the VAZ-2110 (injector, 8 valves) by looking at the faulty controller. It is also possible that the wires from the controller to the ignition coil may break. If there is no spark on each of the coils, you should make sure there is power. If there is no electrical discharge for some reason, then the element must be replaced. The system has an ignition module. Therefore, a useful operation would be to check the “minus”.

Testing for spark

If there is an ignition coil on each of the engine cylinders, then testing for the presence of a spark occurs somewhat differently. In this case you will also need a Hall Sensor. If there is no spark on only one coil, then it should be replaced. But if it doesn't appear at all, then the problem is much more complicated. In this case, the problem may be due to a faulty controller or broken wiring.

To more easily test the presence of a spark discharge, it is advisable to use a Hall Sensor.

It must be brought to the faulty coil and turned on. If the arrow starts to rise, it means there is current in the wires.

Possible errors in VAZ injectors

Codes can indicate malfunctions of any parts and components in the car. Most often this is due to sensors. Temperature sensors are especially affected - they overheat. Car enthusiasts also complain about the injectors. Problems arise due to breaks in the circuit. As a result, they cannot respond on time. This also includes a popular breakdown on the VAZ-2110 - no spark. The 8 valve injector cannot start normally because of this.

Now about engine-related errors. The most common one is overheating. The spark plugs also overheat, causing the spark to disappear. As a result, the motor does not show any signs of life. Next we should consider the valves. These parts may become too dirty, causing them to close completely. They do not allow the necessary mixture of air and fuel to pass through. And finally, the fans - if they do not work, then the power unit will constantly overheat.

The starter turns, but the car does not move - why?

Here you need to inspect the fuses. Perhaps all the problems come from them. They must be checked for integrity visually or tested with an indicator screwdriver.

In addition, often the inability to start the engine is associated with:

• battery discharge;
• breakdown of the switch that regulates the ignition process;
• terminal oxidation;
• failure of the ignition system coil.

The last breakdown requires replacing the winding with a new one.

And finally, the immobilizer may not allow you to turn on the engine. This element is quite reliable and protects the car well from theft, but sometimes its electronic components malfunction and block the ignition.

Other faults

If the starter does not rotate, the spark disappears between the ignition switch and this element. This often happens when the battery is discharged or faulty. When tested, a normal battery shows no less than 11.8 V. A faulty ignition cylinder will appear immediately when the driver inserts and turns the key. If turning the key is too easy or too heavy, the lock needs to be replaced. The starter or ignition system relay is also one of the possible reasons for the lack of spark. But you won’t be able to check these nodes yourself. The “retractor” device may be stuck in the starter. In this case, the spark disappears along the way. Experienced car enthusiasts hit the starter with a key or hammer to return the spark. But this is only relevant in field conditions.

What to do if there is no spark in a VAZ-2110 car? Test the starter in the garage using a battery. If you press the body of the device to the “minus” of the battery, and stretch the “plus” wire to the “retractor”, then the device comes to life. Often the spark can disappear where power is supplied to the starter. This circuit is best checked with a multimeter. One cannot do this alone - an assistant will work with the key while the measurements are taken.

How to fix the problem

So, the reason why the spark disappeared has been established. Now you can move on to fixing the problem. If it's all about the ignition coil, then checking with a multimeter will show this. One point should be noted here. If the ignition coil is faulty, then it is best to immediately replace it with a new one. Some people decide to repair this unit on their own, but practice has already proven that this is nothing more than a temporary measure. The result will still be the same - replacing the damaged ignition coil.

The cause may also be a malfunction of the fuel pump. Checking here starts with the simplest. You should turn on the ignition and listen to see if fuel pumping has begun. If the operation of the fuel pump is not heard, you need to check whether fuel is getting into the cylinders. Also inspect the fuse for the fuel pump for integrity. If it fails, replace it. The reason may be directly in the fuel pump itself. In order to find it, you will need to remove the entire module and disassemble it. It is quite easy to check the performance of the pump. To do this, you need to close the contacts through the tester. In the absence of any indicators, the “death of the patient” can be stated. In such a situation, the part must be replaced with a new one. If “the patient is alive,” then you should check the wiring for breaks and clean the contact group.

Another fairly common reason is candles. To make a more accurate diagnosis, we unscrew them one by one and conduct a visual inspection. If nothing like this is found, we proceed to checking the gap and measuring the resistance. You can check the performance of spark plugs on a special stand, but this is unlikely to be in the garage of most motorists.

Therefore, you will have to use the old, time-tested method. We put a high-voltage wire on the previously unscrewed spark plug, and install its base on ground - the car body or engine. Checking for the presence of a spark is carried out when the starter is cranked

It should be noted that it is important to be especially careful with this verification method. It’s best to simply ask one of your neighbors in the garage for a known working kit of a suitable size - this method of checking will be safer

Problems in the operation of the gas distribution mechanism can also cause a lack of spark. However, the timing belt is the last place where you should look for the source of the malfunction. However, sometimes the problem lies in misaligned valve timing due to incorrect installation of the timing disk. It is located on the crankshaft pulley and plays the role of a synchronizer for the sensor. In order to fix the problem, you must install the disk correctly in accordance with the marked marks.

It is quite easy to detect the cause of problems with high-voltage wires. In this case, the engine will stall, and this will manifest itself as noticeable vibration during operation of the power unit. There are two options here - either the wire is faulty, or they are connected incorrectly. In the first case, it is best to change the entire set at once, in the second, rearrange them in the correct sequence.

Note that not all the reasons why the spark on a VAZ-2110 can fail are given here. The problem may arise, for example, with the controller or with a broken wiring. Sometimes it lies on the surface, and in some cases you have to work hard to detect the malfunction. If you are not particularly knowledgeable about the structure of a car, it is best to immediately seek help from a specialist. This option has one main advantage. Diagnostics will not cost that much, but at the same time you will save your time by not wasting it on a lengthy search for the reasons for the lack of a spark.

Battery problems

Any car owner understands that if the car is not supplied with power, it will not start.
Therefore, it is necessary to check the battery from the very beginning. A red light on the dashboard will indicate that the charge is starting to drop. It will start to light up, indicating that there is a problem with the battery. But even if the light bulb is not on, it is necessary to check the presence of voltage using a tester for this purpose. It should be 12.6 volts. Source

What to do

If the VAZ 2112 flooded the spark plugs, this is not fatal; there are several options for solving the problem:

• The first option is to follow the “smart” operating book, which says the following: if your injector spark plugs are filled with fuel, then you need to unscrew them to dry them
• Drying is carried out by heating (calcination in a fire or using a torch or gas burner)
• After removing the spark plugs, crank the engine with the starter for 10-15 seconds.
• Put the spark plugs back in and start the engine.
• These steps should be carried out according to the manufacturer

Possible breakdowns by group

Modern cars are equipped with a large number of auxiliary components and sensors that make the driver’s life easier and at the same time make repair work more complex. The electronic injector uses several sensors at once, which can cause a lack of spark in the ignition. But the matter is not limited to them; there are several groups of breakdowns:

1. Problems with the fuel system. This group includes malfunctions in which fuel does not enter the engine, its supply occurs with malfunctions, or other errors occur.
2. Malfunctions in the electrical part are among the most common on the VAZ-2110 injector. In the event of such breakdowns, an electrical signal is not supplied to the spark plugs and, accordingly, the fuel mixture does not ignite.
3. Global breakdowns include engine failure, bent valves, and broken timing belts. We will not dwell on such cases in detail, since they require more complex repairs.

No spark VAZ 2112 16 valves - No spark VAZ 2112 16 valves - 22 answers



In the Service, Maintenance, Tuning section to the question No spark VAZ 2112 16 valve asked by the author Level, the best answer is Look at the ignition coil. I changed it myself the other day. And there was a spark. Only weak.

Answer from Brosok: Measure the supply voltage and control pulses. Is the coil 3 or 4 pin? Couldn't you install the wrong one? If everything is fine, it means the DPKV is not reading, or there is a break in the chips. Also, these could be fuses on the ECU or ignition switch. The fact that everything is fine with the alarm system does not mean that the relay is working properly blocking.

And besides the signals, there is an immobilizer installed as standard.

Reply from Leshka from 30rus The other day they couldn’t start the 8th grade either. There was no spark, they already wanted to go for DPKV. The sensor worked - the wire from the dcpv fell apart due to age and frost - replaced it, off we went! Reply from ProsiditOn the + module comes from the ignition switch (blue with a red stripe) Reply from Andrey Fokin First of all, definitely check the ignition coil more carefully, then the ignition switch, you can also check the fuses , I would immediately scan the link as a diagnostician to find out what is there and why.

https://youtube.com/watch?v=4wHGBUx6x3M

Nothing happens when I turn the key in the lock.

Other causes of problems with engine starting may be breakdowns:

The spark in the VAZ-2110 often disappears for another reason - banal oxidation of the contacts. We have already mentioned cleaning them from oxidation; if servicing the ECU did not help, then you should look at other wires. For example, trace the course of a mass conductor. The most vulnerable places on it are where it contacts the body and approaches the battery terminal. If a fault is found at the terminal, replace the wire. At the point of contact with the body, it is enough to simply clean it with a metal brush.

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