The products of the domestic automobile industry are not of high quality, and at first glance it is not so easy to determine the common reasons why the VAZ 2106 stalls or does not start at all. Malfunctions can be in everything - in electrical equipment, in the ignition system or in the power system. Perhaps the spark has disappeared on the VAZ 2106 or it is related to the idle air regulator. Therefore, to help the car figure it out, let’s look at the main reasons why the car won’t start and stalls. To troubleshoot problems, we will study useful recommendations from specialists.
Cold carburetor car engine does not start
Let's consider the causes of the malfunction - why a cold (not warmed up) carburetor engine of VAZ 2108, 2109, 21099, 2105, 2107 cars does not start. The main culprits will be carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone. It should be noted that there are also reasons why a car engine does not start in cold weather, but there is a separate article on our website to describe them. You should also pay attention to the ignition system (2108, 2109, 21099, 2105, 2107), power system, serviceability of the engine itself, etc.
Symptoms of the problem “A cold carburetor engine does not start”
— When the crankshaft is cranked by the starter, the engine does not start.
He shows no signs of life. There are no flashes in the cylinders. — The engine “seizes”, several flashes occur and it stalls.
Causes of the malfunction “a cold carburetor engine does not start”
— There is no fuel in the carburetor float chamber
After a long stay or in the heat, it evaporated. Pump it up using the manual pump lever on the fuel pump.
You can pump fuel into the carburetor float chamber using the manual pump lever on the fuel pump.
— The mesh filter at the inlet to the carburetor is clogged
Details of strainer filters for fuel purification of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
— Sticking of the needle valve needle in the upper position, which locks the fuel supply
Details of the float chamber of the Solex 2108 carburetor
— The air damper does not close completely when the “choke” handle is pulled out
It is necessary to greatly enrich the fuel mixture during a cold start; if the damper does not completely block the cross-section of the first chamber or does not close tightly, the mixture is not sufficiently enriched because the air flow into the carburetor is too large and the engine does not start.
The air dampers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone are completely closed
Check the serviceability of the drive parts. Adjust it.
“Adjusting the air damper drive of carburetor 2105, 2107 Ozone” The air damper may become stuck on its axis, or its control lever may jam. Find out the cause of the jamming (contamination, mechanical deformation) and eliminate it.
— The solenoid valve (EMV) is faulty or the fuel jet of the idle system is clogged
In the event of a malfunction, its needle can completely cut off the fuel supply at idle.
Solenoid valves for carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone Carburetor solenoid valve design
Also, check how the valve is screwed in, if it is not tight, then tighten it, but do not overdo it, do not tighten it too much as you can crush the fuel nozzle inserted into it or, even worse, the seat in the carburetor cover..
On carburetors with an idle air system fuel jet holder, unscrew the holder and check if the fuel jet is clogged. Remove the blockage and blow it out with compressed air.
— “Suction” of foreign air into the carburetor
The image shows the probable culprits of the “suction” of foreign air into the carburetor 2108, 21081, 21083 Solex.
Places of possible “suction” of foreign air into the carburetor 2108, 21081, 21083 Solex
— The starting device is incorrectly adjusted
It should slightly open the closed air damper when starting the engine, increasing the flow of air into the carburetor, preventing the fuel mixture from becoming overrich during the first flares in the cylinders. Also, do not forget that the throttle valve of the first chamber of the carburetor must be slightly open to a certain clearance when the starter is cocked.
Starting devices for carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
— The needle valve of the float chamber is not sealed
A leaky valve causes fuel to overflow, the mixture becomes excessively rich, and the spark plugs are flooded.
Replace the assembly; rubber-tipped needles are commercially available. If you come across a normal one, you can forget about repairs for a long time.
Articles on the website on the needle valve:
Checking the needle valve with vacuum on carburetors 2105, 2107 Ozone, 2108, 21081, 21083 Solex
— Fuel level is incorrectly adjusted
As a result of incorrect adjustment of the fuel level in the float chamber or damage to parts of the float device (stop valve floats), the fuel mixture may become over-rich or, conversely, over-lean, and the engine will not start as a result.
Approximate fuel level in the float chambers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
Adjust the fuel level in the float chamber:
— The fuel or air nozzle of the main metering system of the first chamber is clogged
Remove the carburetor cover, unscrew the air jets, unscrew the fuel jets of both chambers, remove the diffusers. Wash them with acetone, clean them with a thin wire or wooden stick, and blow with compressed air.
GDS elements of carburetor 2105, 2107 Ozone
We carry out a similar cleaning on the 2108 Solex carburetor.
GDS elements of carburetor 2108, 21081, 21083 Solex
Notes and additions
Before looking for the reasons why a cold carburetor engine does not start, you should check the ignition system, as the engine may not start due to its malfunction.
Source
Benefits of installing aftermarket pistons
Elements with grooves for valves are very durable. Even if the timing belt breaks, the upper camshaft and valves will simply freeze in place. The piston will go down due to the crankshaft, and nothing bad will happen. The valves will fall into the grooves created for them. Next, the owner will need to take the car to a service station, where specialists will restore the timing mechanism. This is a huge plus.
Note that if the pistons do not have these grooves, then as a result of a belt rupture, the owner will face serious repairs. The pistons and valves themselves, as well as the camshaft pastel, are being replaced. The cost of such repairs can start from 30 thousand rubles. Therefore, it is worth installing “STK” pistons or similar ones. Grooves will save you from expensive repairs.
VAZ 2106 carburetor starts poorly when cold with suction
I have a problem. Before cleaning the carburetor, the DAAZ 2107-1107010 was idling at its top five, either at maximum or completely absent, the car had difficulty gaining momentum, in general, I often drove with my hand on the choke, BUT IT STARTED WITH A HALF-TURN. I washed it: it runs smoothly, without interruptions, without failures when hot, but it STARTS almost from the pusher. I disassembled everything except the damper drive. I cleaned it with a spray (in general, a lot of crap leaked out), I didn’t change the jets, I took out the float, barely breathing on it. IT'S SO DIFFICULT TO START IT'S HORRIBLE. It warms up a little and works like a clock. What could be the problem
Checking the performance of the power system
If your car won't start, we suggest starting with diagnosing the power system. It is quite possible to do it yourself. This requires:
Most often, in this very system, the fuel pump fails, which is very sensitive to low-quality fuel. Special filters provide its protection, but over time, the filter elements become clogged and substances enter the pump that negatively affect its operation.
If this is the case, you will need to dismantle the device, thoroughly clean it, install new filters, and only then carry out installation.
Another problem with the fuel pump is air getting into it. To eliminate this problem, you need to very carefully check the entire line, and then eliminate any leaks found.
Checking the fuel pump
What to do if the scooter does not start when cold
The part in question has a relatively simple structure. Rotation is carried out using a special pusher driven by a long steel rod. You can check the pumpless pump without removing it from the engine:
- you should remove the fuel pipe from the filter installed after the pump or disconnect the line in another place accessible for clear viewing;
- Then, using a special pedal, you need to pump the fuel.
The back of the part is equipped with a special lever. If you start pumping it, then gasoline should start flowing through the fuel line. Its absence indicates a malfunction. In this case, the easiest way is to purchase a new fuel pump. Its cost is no more than 1 thousand rubles. It is also possible to carry out repairs - but the cost is comparable to buying a new part.
VAZ 2106 does not start when hot
Often, the reason for this is the carburetor. It happens that the engine is warm enough, but the needle in the float chamber is weak. As a result, after the engine is turned off and the needle does not stay at a sufficient level, the gas pump pumps fuel into the carburetor, which overflows. If you try to start such a car, the fuel will be too rich through the carburetor. As a result, a problem arises: the VAZ 2106 will not start. This reason can be diagnosed by low engine speeds. In this case, after some time the unit begins to work normally.
Minuses
If the piston is light (as much as possible), the motor will gain more power. You can achieve an increase in dynamic characteristics by 5-7%. Pistons with grooves cannot be called light. To make a recess at the top of the part, you need to have a fairly thick wall. This makes it heavier, which is why power is lost.
In addition, these grooves change the compression of the combustible mixture. This also affects the traction of the power unit. To summarize, with the installation of such a part, the engine will lose that same 5% of power. For a 150 hp engine. With. this is 10.5 “horses”. Another drawback is higher fuel consumption. The dimensions of the VAZ pistons are the same as the factory ones, but due to the grooves, the volume of the combustion chamber increases, even if only slightly. Finally, due to increased volumes, compression decreases. Detonation is also increasing.
Doesn't Start When Hot - TOP 3 Causes of Poor Engine Starting
With the arrival of hot days, more and more drivers are faced with the problem of poor engine starting when hot, after several minutes of parking. Moreover, this is a problem not only for carburetor engines - a situation where it does not start when hot can await both owners of cars with injection engines and diesel cars. Only the reasons are different for everyone. Here we will try to collect them and identify the most common ones.
When a hot carburetor engine does not start
Why is it difficult to start when hot and what to do?
The reasons why the carburetor does not start well when hot are more or less clear; the volatility of gasoline is mainly to blame. The bottom line is that when the engine warms up to operating temperature, the carburetor also heats up, and after turning it off, within 10-15 minutes, the fuel begins to evaporate, making it difficult to start the car.
Installing a textolite spacer can help here, but it does not give 100% results.
In such a situation, pressing the gas pedal to the floor and purging the fuel system will help to start a hot engine, but not longer than 10-15 seconds, since fuel can flood the spark plugs. If the question concerns the Zhiguli, then the fuel pump may also be to blame, since Zhiguli gasoline pumps really do not like heat and sometimes completely refuse to work when overheated.
When an injection engine does not start
Since an injection engine is somewhat more complex than a carburetor engine, there will be more reasons why such an engine will not start. In particular, they may be malfunctions of the following components and mechanisms:
Next, let's move on to considering the possible reasons for poor hot starting in cars with diesel engines.
When a hot diesel engine has trouble starting
Unfortunately, diesel engines can also sometimes fail to start when hot. Most often, the causes of this phenomenon are malfunctions of the following components:
Now we will try to summarize the information provided so that it is easier for you to find the cause of the breakdown if it happens to your car.
injection pump plunger pair
Three main reasons for poor hot starting
So, according to statistics, the main reasons for poor engine starting after idle time at high temperatures are:
"Avtramat"
These are Ukrainian-made parts. Pistons are manufactured at a Kharkov plant. The part is produced by casting. The alloy completely replicates that of the original spare parts. The factory dimensions of the VAZ pistons are also repeated. But unlike the original, the Ukrainian element has deeper samples. This gives it a lot of advantages over the standard part if the timing belt breaks. As for the compression ratio, it remained unchanged. Therefore, if you install these products, the difference in the power characteristics of the engine will not be noticeable.
Due to the fact that the samples are increased, the area of the combustion chamber has increased slightly, the efficiency should be lower compared to standard spare parts. However, the numbers differ slightly. So, the figure is 53.2 cm 2 for the original and 53.3 cm 2 for the Avtramat. In practice, this is completely unnoticeable. There is one more advantage that these pistons have. Priora (the price of parts is 3 times less - 2 thousand rubles, than for products from STI - almost 7 thousand) will be inexpensive to maintain if you use these products.
These parts are produced at the enterprise in Samara. Their technical characteristics are practically no different from Avtramat products. The difference is in the weight of the piston. Due to the higher weight, the acceleration dynamics of the car are reduced. Also, STK pistons have a higher price.
VAZ-2106 does not start when cold or hot: reasons
Cars from the Togliatti Automobile Plant are simply extremely popular among domestic consumers. However, the main reasons for the demand for them can only be said to be the relatively low price and availability of spare parts. Otherwise, these vehicles are much inferior to imported cars.
Quite often, owners of domestic cars are faced with the fact that the VAZ-2106 does not start. What is the reason for this problem, and what to do if it has happened to you? In this article we will provide answers to these questions, and also give a number of useful tips for repairing the “six”.
Checking the performance of the power system
If your car won't start, we suggest starting with diagnosing the power system. It is quite possible to do it yourself. This requires:
Most often, in this very system, the fuel pump fails, which is very sensitive to low-quality fuel. Special filters provide its protection, but over time, the filter elements become clogged and substances enter the pump that negatively affect its operation.
If this is the case, you will need to dismantle the device, thoroughly clean it, install new filters, and only then carry out installation.
Another problem with the fuel pump is air getting into it. To eliminate this problem, you need to very carefully check the entire line, and then eliminate any leaks found.
Problems with the fuel line and carburetor
At the next stage, you need to check the fuel line very carefully - it is quite possible that it is damaged, which is why fuel simply does not flow into the engine. If no damage has been identified, move on to the carburetor. This device ensures the ignition of gasoline and is also responsible for its enrichment.
Dismantling a carburetor is a rather complicated procedure, which is best left to experienced professionals. But if you have repaired your car several times, you can do everything yourself. After disassembly, troubleshooting of device parts is carried out, replacement of worn or failed components, as well as installation and adjustment of the carburetor.
Clogged filters
Engine stopping due to these seemingly minor elements is more typical for older cars. If the fuel filter is clogged, gasoline will simply stop flowing into the carburetor or ramp. Moreover, the car can stall “every once in a while.” A number of car models (this is especially typical for diesel engines) have several filters - coarse and fine. The cause of their contamination may also be the fuel tank, in which a lot of dirt has accumulated. In this case, it needs to be removed, washed, and dried.
Engine 2106 does not start well when hot"
It's hard to start the car when the engine is hot
Engine starts hard when hot
When starting a cold VAZ-2106 engine, the carburetor air damper is completely closed, the engine starts on Undoubtedly, for a gasoline engine and a diesel engine the problem is bad The engine does not start well when hot
The engine of a VAZ 2106 car does not start - (the engine is cold, warm or hot)
In this article, we examined the topic of why a diesel engine does not start well when it is hot. When starting a cold VAZ-2106 engine, the carburetor air damper is completely closed, the engine starts on a VAZ-21093, but it does not start well when the engine is hot.
I sat and read the posts and it dawned on me why I have trouble starting when hot.
The engine of a VAZ 2106 car does not start - (the engine is cold, warm or hot)
It's hard to start the car when the engine is hot
Pre-launch inspection and preparatory activities
If a VAZ 2107 car starts poorly when hot or does not function at all in normal mode, this means a loss of settings or an accumulation of minor faults. Engine technical inspection includes the following steps:
- Checking the levels of operating fluids in the engine crankcase, gearbox, cooling system and brake system.
- Carefully inspect the external surfaces of the engine for oil, antifreeze or fuel leaks. Particular attention is paid to the high-voltage wires that are connected to the spark plugs; the contacts must be clean without signs of burning or damage.
- During long-term parking of several days, gasoline evaporates from the float chamber, and the level is replenished using a hand pump.
The next action of the driver of the VAZ 2107 is an attempt to start the engine. To do this, you need to take a seat behind the wheel and set the gear shift lever to neutral. When turning on the starter, it is recommended to depress the clutch pedal to reduce the load on the battery. If the engine does not start after 5–10 rotations with the starter, you should stop trying and carefully inspect the carburetor and other components.
Troubleshooting carburetor problems
Regardless of whether an EMC is installed or not, the procedure for cleaning the idle fuel jet is the same.
In order to remove the XX jet from the radiator body, you will need a 13-size wrench, but depending on the design, a 14-size wrench can also be used. After turning the EMC, remove the nozzle. If the center hole is clogged, carefully clean it with a thin wire or blow it out with compressed air.
Once the fuel jet center channel is clean, reinstall it. Screw in until it stops and tighten carefully with a wrench. Connect the “positive” wire to the power terminal of the EMC. Start the engine.
To make it easier to work with the carburetor, it is necessary to remove the air filter. Turn on the ignition, first removing the power wire from the EMC terminal. Touch the power wire to the valve terminal. A distinct click indicates that power is coming to the EMC input. In this case, the cause of the malfunction should be sought in the jet or in the carburetor itself. The absence of a click indicates that the fault is in the solenoid valve or fuse. To check the valve, connect the “plus” of the car battery to the terminal of the EMC, and the “minus” to its body. If there is no click, the solenoid valve is faulty and must be replaced.
Broken timing belt
This malfunction can be determined if you remove the special casing (in some cars it is enough to bend it a little). Replacing a belt takes a little time (20-30 minutes) for an experienced car owner. However, the situation is worse if, at the moment the engine stopped, a blow was heard from its side. This indicates a “meeting” of valves and piston heads, when the latter do not have special grooves that prevent collision. It’s worth finding out in advance whether you really have a car with such pistons: if so, pay special attention to the condition of the belt, otherwise you may face a major repair.
Carburetor car engine starts and stalls
In this article we will take a closer look at the situation when a carburetor engine of a passenger car (VAZ 2108, 2109, 21099, 2105, 2107 and their modifications) starts and stalls due to a carburetor malfunction. Malfunctions of carburetors 2105, 2107 Ozone, 2108, 21081, 21083 Solex and their modifications will be considered.
Symptoms of a problem
Causes of the malfunction “carburetor engine starts and stalls”
— There is no fuel in the float chamber
Pump it up using the manual pump lever on the fuel pump.
The fuel pump or power system may be faulty. Remove the hose from the carburetor fuel supply fitting and press the manual primer lever on the fuel pump several times. A strong pulsating stream of gasoline should come out of the hose hole. If it is missing or weak, check the fuel pump or power system.
Checking the VAZ fuel pump
— The mesh filter at the inlet to the carburetor is clogged
Details of strainer filters for fuel purification of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
— The solenoid valve is faulty or the fuel jet of the idle system is clogged
Solenoid valves of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
Check the serviceability of the valve itself by unscrewing it from the carburetor and removing the fuel nozzle from it. The jet should be carefully inspected for contamination and deformation. We also check the ease of movement of the valve shut-off needle, the presence and integrity of the rubber O-ring on the valve body.
Carburetor solenoid valve design
Unscrew the idle air system fuel nozzle holder (on carburetors with a holder instead of a solenoid valve), rinse, clean the fuel nozzle and blow with compressed air.
— “Suction” of foreign air into the carburetor
In this case, the fuel mixture is lean. If the engine starts and immediately stalls, it is most likely very lean. The image shows probable places where foreign air is “sucked in” on the 2108 Solex carburetor.
Places of possible “suction” of foreign air into the carburetor 2108, 21081, 21083 Solex
Read more about the “suction” of foreign air in the article “Suction of foreign air into the carburetor.”
— The trigger diaphragm is damaged or it is not adjusted
Disassemble the starter housing and replace the diaphragm with a new one. Adjust the starting device.
Starting devices for carburetors 2108, 21081. 21083 Solex, 2105, 2107 Ozone
— Fuel and air jets, emulsion wells and tubes of the main dosing system are clogged
It is necessary to remove the carburetor cover, unscrew the jets, remove the tubes, rinse and clean them, clean the wells, blow everything out with compressed air and put it back. The image shows what should be cleaned on the carburetor 2105, 2107 Ozone.
Fuel and air jets, emulsion tubes and emulsion wells of GDS carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
— Fuel and air jets and channels of the idle system are clogged
Unscrew the jets, rinse and clean them, and blow them with compressed air.
Air and fuel jets for CXX carburetors 2108 Solex and 2105, 2107 Ozone
You can try to clean the idle system without disassembling the carburetor. Here is an article on this topic “Cleaning the idle system of the carburetor 2108, 21081, 21083 Solex.”
— The fuel level in the carburetor float chamber is broken
The fuel mixture is either very lean when the level is low or very rich when it is too high due to incorrect adjustment.
Approximate fuel level in the float chambers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone
Articles on the site about adjusting the fuel level:
— The carburetor air damper drive is not adjusted (“choke”)
A not fully open choke causes the fuel mixture to become richer in some cases to such an extent that it is difficult to start the engine, especially when it is hot. The spark plugs may be flooded with fuel. Adjust the drive:
With the choke handle fully extended, the air damper should completely cover the cross-section of the first chamber of the carburetor.
The air dampers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone are completely closed
With the handle fully recessed, the air damper should be strictly vertical.
The air dampers of carburetors 2108, 21081, 21083 Solex, 2105, 2107 Ozone are completely open
— The drain line from the carburetor to the gas tank (“return”) does not work
Drain line - “return” of the fuel system of the carburetor engine of VAZ 2108, 2109, 21099 cars
Main reasons
The reasons that the speed of the power unit does not decrease differ for cars with injection and carburetor engines.
On carburetor engines
In cars equipped with carburetors, it is this unit that is responsible for preparing and supplying the air-fuel mixture to the combustion chambers. Most often, problems with high speeds are associated with an over-enrichment of the fuel-air mixture, but other causes of malfunction may also occur.
The effect of increased speed can be caused by the following problems.
- Incorrect operation of the throttle valve responsible for the air supply. If the damper, after releasing gas or warming up the engine, cannot close tightly, and a gap forms in it, then an enriched fuel-air mixture enters the engine.
- Open suction. Choke is a control knob for adjusting the air damper, which is responsible for the flow of air into the carburetor. With its help, you can enrich the fuel-air mixture with air. If the suction is not working correctly, the mixture becomes over-enriched with air.
- Needle valve position. In this case, the incorrect dose of fuel will enter the combustion chamber. A malfunction of the needle valve can manifest itself in different ways, including the absence of a drop in speed.
- Incorrect idle speed adjustment. This problem is often encountered by car owners who have changed or repaired the carburetor.
- A fairly rare cause is a burnt-out cylinder head gasket. The problem is manifested not only by increased engine speeds, but also by the appearance of white smoke from the engine compartment.
On injection engines
For cars equipped with injection engines, the range of reasons for increased speed is wider. This is due to the fact that such cars have many more electronic devices and sensors that are responsible for transmitting information to the electronic control unit that regulates engine speed. Therefore, disturbances in engine operation can be associated with both mechanical damage and malfunction of electronic systems.
The reason for the increased speed of injection engines may be one of the following problems.
- Incorrect operation or failure of the coolant temperature control sensor. With such a malfunction, the engine constantly operates in warm-up mode, since the ECU (electronic control unit) does not receive information from the sensor that the engine is already warmed up. As mentioned above, in this mode the engine speed is increased.
- Failure of the mass fuel flow sensor (MAF), which is also called the idle speed sensor. A malfunction of the mass air flow sensor can manifest itself in different ways - a loss of speed or an increase in speed. In the latter case, the engine also goes into constant warm-up mode.
- Throttle position sensor malfunction. In this case, a sensor malfunction may be perceived by the ECU as information about an open throttle valve. Then the control unit gives a command to increase the speed.
Also, the reasons for the increased speed of injection engines can be associated with mechanical damage.
- Broken throttle return spring.
- Sticking throttle cable.
- Damage to the injector gaskets.
