Candles
First of all, find out if there is a spark at all. The weakness of the latter allows you to start the engine while it remains hot, but it does not work when it is cold.
Unscrew the spark plug, place it against ground and crank the starter. If there is a spark, then there is probably a problem in the fuel system. We will tell you about it later.
It is necessary to do otherwise when the unscrewed spark plug works properly, but it turns out to be wet. Here you should check the timing belt. The latter sometimes jumps off, which disrupts the correct gas distribution and, accordingly, the VAZ engine does not want to start.
If you see that the spark plugs are filled with fuel, then perhaps this very circumstance is preventing you from starting the engine. Dry them with a burner or on a gas stove burner. When they turn out to be wet again during the next attempt, you will have to find out why this happened.
If there is no spark, the cause is sought further. It often lies in problems:
- crankshaft pulley or sensor that controls its position (DCPV);
- computer.
In most cases, the VAZ model 2109 injector does not want to start precisely because of the failure of the DPKV. Failure of other sensors does not prevent the engine from starting, it will simply not work correctly.
First, check whether the connector leading to it is intact and whether the wires are in good condition. It is the destruction or contamination of these elements that most often interferes with the normal operation of the DPKV, while the device itself is reliable.
To test the sensor, just hold a piece of metal close to it and measure the output voltage. It will fall if the piece of iron is taken away, and rise when it is brought close.
Another reason why a VAZ may not start is the crankshaft pulley. The disadvantage of this unit is that its teeth are partially made of rubber, which means they can come off or even scroll. This affects the sensor readings, and the computer, guided by them, does not want to supply voltage to the spark plugs. It’s not difficult to check - remove the casing from the timing belt (inspect it at the same time), and then examine the pulley.
There is a high probability that there is no spark due to a faulty ignition. First you should make sure that the connector leading to it is intact. Installing a known-good module on a Lada that does not want to start will allow you to confirm your suspicions.
It is imperative to inspect all wires. A break in them, even with working devices, often leads to the inability to start the engine.
VAZ 21099 catches but the injector does not start
In the article “VAZ 2109 will not start,” we examined in detail the reasons why the VAZ 2108, VAZ 2109, VAZ 21099 carburetor does not start . However, injection VAZ 2109 have their own characteristics, so this article is intended to help the owners of a VAZ 2108 2109 21099 injector when their iron horse stops starting. The differences in troubleshooting for carburetor and injection engines are very significant. Thus, the owner of a carburetor VAZ 2108, VAZ 2109, VAZ 21099 can, with his eyes closed, determine why his car does not start. However, if you transfer him to an injection VAZ 2108, VAZ 2109, VAZ 21099, which does not start, then the person will not know what to do. It’s understandable: an electric fuel pump, an ECU, a bunch of sensors, injectors, an ignition module. Without knowing what and in what order to look, a situation where an injection engine does not start can quite frighten the car owner. Here, as in diagnosing any malfunction, a clear, well-thought-out sequence of actions to identify the malfunction is important. So let's start, if the engine VAZ 2108 2109 21099 injector does not start, then the old rule applies here: “Either there is nothing to burn, or there is nothing to ignite.” That is, either there is no spark, or the combustible mixture does not enter the engine cylinders. 1) Check if there is a spark. To do this, unscrew the spark plug from the cylinder, press it against the ground and turn the starter. If the spark jumps at the spark plug, then the problem is in the fuel supply system. However, we must remember that if the unscrewed spark plug is wet and there is a spark, be sure to check the timing belt marks.
Mark on the camshaft gear VAZ 2109
Mark on the flywheel of VAZ 2109
Due to the fact that the timing belt slips one or more teeth, the valve timing will be disrupted and the VAZ 2108 2109 21099 injector engine will not start. If the spark does not jump at the spark plug, then the cause may be: the crankshaft position sensor (hereinafter referred to as DPKV), the crankshaft pulley, the ignition module, the ECU. 1a) Many people are very afraid of the fact that there are many sensors in the injector. Yes, it’s true, incorrect operation of the sensors can greatly ruin the life of the owner of a VAZ 2108 2109 21099 injector. I’ll tell you one important detail that will immediately make you feel better: the VAZ 2109 engine will not start due to a malfunction of one single sensor - the DPKV. If any other sensor is faulty, the engine will start, but its operation will be incorrect - it may stall, not develop power, increase fuel consumption, but it must start. So, we check the DPKV VAZ 2108, VAZ 2109, VAZ 21099, the integrity of its connector and the wiring to it. Very often the DPKV connector rots, since moisture and dirt can get into it from below, although the sensor itself is very reliable. If there is a suspicion that the DPCV is faulty, it can be removed and easily checked. Apply power to it from the battery and bring metal to its working area. When the metal approaches, the output voltage of the sensor should increase; when the metal is removed, the output voltage of the DPKV should be close to zero. If the DPKV is faulty, we change it and try to start it. If it doesn’t start, we move on. 1b) Crankshaft pulley. What could be the problem here? The problem is that part of the pulley with teeth on the DPKV is rubber, and it can either fall off or spin.
Part of the VAZ 2109 pulley with teeth for DPKV fell off
The VAZ 2109 with an injector has an electric fuel pump
The fuel pump VAZ 2108 2109 21099 injector is electric, it is immersed in the car’s gas tank. When the ignition is turned on, its operation should be heard. To check whether it is pumping fuel or not, you can loosen one of the fuel supply pipes, place a container under it and turn on the ignition - gasoline should flow from the pipe. The pressure in the fuel rail of a VAZ 2109 with an injector can also be measured using a conventional pressure gauge. The pressure regulator installed on the fuel rail has a special outlet for connecting a pressure gauge. We connect the pressure gauge and look at the pressure in the fuel line. It should be about 4 atmospheres. If the pressure gauge does not show pressure, then the fuel pump is not working. 2b) If the fuel filter is clogged, the pump will not be able to provide the required fuel supply to the vehicle injectors.
Fuel filter VAZ 2109
Again, you can tell whether the filter is clogged or not using a pressure gauge connected to the tap of the pressure regulator on the car’s fuel rail. 2c) Clogged injectors.
Dirty injection engine injectors
When the injectors become clogged, they either do not allow fuel to pass through at all, or the fuel flows in in smaller quantities and does not spray, but drips. Due to clogged injectors, it may be difficult to start the VAZ 2108 2109 21099 injector engine in cold weather. Such a car usually does not develop full power while driving. 2d) Fuel may not be sprayed by the injectors if they do not receive opening signals from the ECU. You need to make sure that the chips are installed on the injectors and that all wires are intact. 3) When starting a cold engine in cold weather, especially on injection engines VAZ 2108, VAZ 2109, VAZ 21099, a phenomenon such as slipping or cutting off the teeth of the timing belt often occurs. In this case, the valve timing of the engine is disrupted and it cannot start. To make sure that the timing belt has not slipped, you need to remove the belt cover and check the marks on the camshaft wheel and on the flywheel shaft. If everything is in order, we move on. 4) If the spark plugs VAZ 2108 2109 21099 are flooded, then they need to be dried. A spark does not form on a flooded spark plug. If you unscrew a spark plug and it is all wet, then you need to unscrew all the others and calcine them on gas. If they are flooded again, you need to look for the cause elsewhere. 5) Some VAZ 2108 2109 21099 injectors cannot start in cold weather with the engine temperature sensor connected. This is probably a feature of the firmware or something else. You remove the temperature sensor chip, the engine starts with difficulty, but it starts. When connected - no. This feature can confuse anyone: there is a spark, and the spark plugs are wet, and the belt has not slipped, but the car will not start. I removed the temperature sensor and it started. This situation, of course, is the exception rather than the rule, but it is better for the owner of the VAZ 2109 to know about it. 6) Also a rare situation, but it happens. Shedding of the catalyst in the car muffler. In accordance with environmental requirements, a catalyst is installed in the muffler of VAZ 2108, VAZ 2109, VAZ 21099, which reduces emissions of harmful gases into the atmosphere. If this catalyst crumbles inside the muffler, the exhaust gases will be difficult to exhaust and the engine will either not start at all or will stall. To eliminate this point, you simply need to loosen the fastening clamp between the catalyst and the muffler so that the exhaust gases exit after the resonator.
The problems described above are the most common reasons why the VAZ 2108, VAZ 2109, VAZ 21099 injector engine does not start, but you should remember that there are special cases in which only a service station can help.
Fuel system
If there is a spark in a carburetor or injection engine, it should be assumed that the car does not start due to problems in the fuel supply system.
First make sure that gasoline is flowing into the injectors. If not, then look at the VAZ fuel pump. It is equipped with an electric motor and is located directly in the tank. Normally, when the ignition is activated, it starts to make noise.
It is advisable to find out whether the pressure in the ramp is normal. Measure it with a pressure gauge - there is a special fitting for it. Connect the device to it - if the reading is 4 atmospheres, then everything is in order. Low pressure appears due to a clogged fuel filter; this element will have to be removed and cleaned.
If there is no positive result, move on to the injectors. When they become clogged, gasoline either stops flowing altogether or its volume noticeably decreases. Moreover, it does not spray, but only drips. This problem does not make itself felt while the engine is hot. In frosty weather, the car, even if it starts moving, will still not be able to develop normal power.
In addition, fuel atomization does not occur when the computer does not open the injectors. Make sure they have all the wires and are securely attached.
Popular causes of malfunction
The most common reasons account for about 95% of all cases when the starter does not turn. That’s why we pay attention to them first.
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The starter does not turn differently in different situations. It is important to take this into account and clearly monitor all associated symptoms. So, even without the help of specialists, you will be able to return the unit to operation and resume normal operation of the ignition system
Often, simply disassembling and cleaning the internal components of the starter can eliminate problems with its functionality. Therefore, after removing the device and not finding damaged elements inside it, try to thoroughly clean everything, assemble it and put it back in place. It is likely that the starter will start turning.
Muffler
Sometimes an injection car does not want to start due to shedding of the catalyst in the muffler. It serves to reduce harmful emissions and is installed in accordance with current environmental legislation on all cars.
When the catalyst crumbles, the gases cannot escape normally, which means that the car will not move, since the computer will not allow it to start. It is not difficult to check this possibility - unscrew the muffler mount so that the exhaust comes directly from the resonator. If this helps, then change the catalyst.
How to fix starter malfunctions with your own hands
The electrical component of the starter consists of the following structural elements:
When checking the solenoid relay, skip the starter operation, bypassing its switching. The relay has 3 terminals at once, one of which is the control terminal. The remaining 2 large terminals, located at the input to the battery and at the output of the starter, are closed using a screwdriver or wrench. Closing for a short period of time is enough, the main thing is that the tool you are using does not touch the metal body directly under the hood.
Observe the changes in the starter during the process of closing the terminals - if the device rotates, perhaps with a clearly audible crackling sound, then the fault is caused by the solenoid relay.
Remember that starting the engine in this way is prohibited, because the main gear of the device does not engage.
Most likely, the contact planes on the inner plane simply burned out, and therefore a dielectric layer of metal oxides formed on top. To burn the contacts, there is no need to make great efforts; just one start of the VAZ-2109 engine is enough.
There are 2 ways to repair the VAZ-2109 solenoid relay:
What to do if you can’t pull it?
You can also often encounter other machine breakdowns that you can quickly fix yourself.
You can often hear that the car “does not pull.” First of all, the phenomenon is associated with low pressure on the ramp. When the engine starts, it idles, but does not pick up speed. In these modes, the fuel pump requires greater performance, which it provides. If the car does not pull hot, you need to check the air flow meter and spark plug.
Any car owner can diagnose the breakdown and fix the problem at home. The main thing is to approach the work carefully and after fixing the problem, the car will be a joy to use for a long time. The owner will be satisfied, having a practical, very convenient machine, easy to operate and repairable.
Each car is unique and, knowing the main requirements for repair and movement, the car will drive without problems and will not need to replace spare parts. Each breakdown must be quickly repaired and reliably fixed.
Common causes of failure
Identification of starter components
If on a VAZ 2109 the injector or carburetor stops starting the engine, and the starter does not click, this may be due to various malfunctions.
In general, it should be noted that there can be several options for a malfunction of the starter unit:
If the injector does not start, and the starter unit makes only one click, the cause of the problem may be:
Starter unit "nine"
If the device clicks several times, but does not turn the engine and, accordingly, the VAZ 2109 does not start, then there may be several reasons:
You can turn the key as much as you like, but if the mechanism does not show any signs of life and the engine does not start, then the cause of the malfunction may be as follows:
If you have dismantled the mechanism and found no damage, try cleaning it and reinstalling it. It is quite possible that after this the VAZ 2109 starter will start working normally (the author of the video is the Avtoelektika HF channel).
Diagnosis of sensor failure
Let's consider deviations in engine operation and the corresponding possible causes. Unstable operation at idle, difficult starting or stopping the engine after driving in high power mode can be caused by malfunctions of the mass air flow sensor (MAF) - it will give the controller at low speeds readings that are 15–25% higher. If there is excessive fuel consumption or the engine response has decreased, the mass air flow sensor gives underestimated readings.
Jerks and dips when switching from idle to operating speeds, even in the case of light loads, means that the operation of the sensor that reads the throttle position has been disrupted. Difficulty starting a warm engine or slight excess fuel consumption – the coolant has failed.
The engine picks up speed poorly and does not develop the required power, or there is a large excess fuel consumption - the knock sensor has failed or the wire from it has broken. In the event of a noticeable overconsumption of fuel with a simultaneous increase in the amount of harmful emissions in the exhaust gases, the oxygen sensor has failed.
A slight decrease in throttle response and deterioration in other engine performance characteristics means a failure of the speed sensor or oxidation of the contacts of its wires or connector. Limiting engine speed or stopping it indicates a failure. Large excess fuel consumption - the phase sensor has failed. Minor deterioration in engine performance or difficult starting means the temperature sensor of the air entering the engine has failed.
If all of the above devices and sensors have been checked, but the injection VAZ-2109 does not start, then the processor may have failed and it does not properly control the entire starting system. In this case, diagnostics at a car service center is required.
Checking injectors and timing belt
When there is a spark and its color is bright bluish, check the fuel supply: turn out the injectors and turn the engine shaft with the starter. The fuel should be sprayed from the nozzle in a uniform cone-shaped “torch”. If instead the injector pours gasoline or splashes it, then it is clogged.
If the tested components are working, then look at the timing belt. Owners of the injection “nine” have more than once encountered the situation of the belt slipping by several teeth. In winter, this can happen when starting a cold engine when the camshaft rotates heavily. To check, look at the timing mark. If it matches, check the crankshaft sensor and its wire (sometimes it comes off). Then the remaining sensors are checked.
Source
Rare situations
They happen noticeably less frequently than those we described above. But under no circumstances should we exclude them.
After reviewing the situations below, compare them with the behavior of your starter and a car that has stopped turning or clicks but does not turn.
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Having understood the reasons for the failure of the starter, you can bring the device back to life on your own. Don't rush to throw away your old starter and buy a new one. The practice of VAZ 2109 owners shows that partial repairs, and sometimes even simple cleaning of the device, make it possible to restore the functionality of one of the main elements of the ignition system for a long time.
How to charge the battery in a VAZ-2109
If the starter malfunction is due to lack of battery charge, start charging the device. To properly charge the battery, carry out the procedure in a ventilated room. It is not necessary to remove the unit from the car; the process can take place directly in the VAZ-2109. When charging the battery, follow these requirements:
Typically, 10-12 hours are enough to charge the battery. Please note that in the summer the electrolyte in the VAZ-2109 heats up at an accelerated pace, so the car owner’s task is to regularly check the density and level of the material.
