Why does the engine stall after warming up?

Every owner of an Oka car has at least once encountered a situation where the engine does not start. Most problems appear in winter rather than in summer.

What to do in such cases? How to quickly eliminate the main cause of a malfunction? This article will talk about various reasons why the Oka does not start and how to solve them.

Oka was produced for the first time in the Soviet Union at the Volzhsky plant. The car is classified as a passenger car. In total, about 700,000 copies were produced from different factories in Russia. Experts carefully tested the cars before they went on sale. They have been tested for stability, comfort, power and endurance in a variety of ways.

Oka won't start

Every owner of an Oka car has at least once encountered a situation where the engine does not start.
Most problems appear in winter rather than in summer. What to do in such cases? How to quickly eliminate the main cause of a malfunction? This article will talk about various reasons why the Oka does not start and how to solve them.

Oka was produced for the first time in the Soviet Union at the Volzhsky plant. The car is classified as a passenger car. In total, about 700,000 copies were produced from different factories in Russia. Experts carefully tested the cars before they went on sale. They have been tested for stability, comfort, power and endurance in a variety of ways.

Answers (4)

Check the battery charging, that is, the battery itself, as well as the spark plugs, armor wires, and ignition coils.

if the reason is not in the spark plugs, armor plates, battery, then perhaps in the fuel pump

check if there is spark? that is, are the coils, spark plugs and BB wires ok? and a fuel pump! carburetor, if carburetor version

Check the ignition adjustment, if the ignition is on the marks, then do it a little earlier, but so that when you sharply press the gas pedal, the piston pins do not knock / adjustable by ear, using scientific poking /. Check the compression in the engine cylinders with a compression meter, it should be at least 8 units, if less, the piston is worn out, there is not enough compression in the engine cylinders, so it won’t start when cold, or it starts poorly and with suction even in the summer.. Check the spark plugs, they should be clean without carbon deposits, if they have black carbon deposits on them, there are many reasons 1. rich fuel mixture - reason, air filter is clogged/change/, carburetor is clogged/disassemble, wash, blow with a compressor or pump/. 2. Late ignition/adjust/. 3. The candles have the wrong heat rating. 5,The ignition coil does not supply the required current to the spark plugs/install a working one/. 6. The timing valves/gas distribution mechanism/are tightened, there is no clearance. 7. The capacitor does not work correctly / if the ignition is not electronic /, replace it or add a second one to it - it’s more reliable. These could be the reasons, and it is advisable to look for them with an experienced driver or mechanic. You can also drive it to a service center, but experienced swindlers work there /if you don’t know anyone/, they can even find something that doesn’t exist and didn’t exist, everyone needs money.

Specifications

Universal body parameters help position the car in any parking space. The minimum dimensions of the car contribute to this, namely:

The main reasons why a car won't start

If the Oka does not start, then, first of all, you should study the symptoms that appear. First of all, determine whether the starter turns. If it turns, what are its characteristics - does it work poorly, are there any sounds, and so on.

If necessary, you can try to start the car several times. If it does not turn over, then there are two reasons: a faulty starter or problems with the battery. In the first case, you need to contact a service station, and in the second, charge the battery, if possible, or change it altogether.

Some models have special protection in their design - a fuse. Finding it will not be difficult even for the most inexperienced driver. If the problem is a low battery, then the vehicle's electronics will not function fully. The most common case is terminal oxidation. To eliminate this, it is necessary to clean the terminals from dirt and oxidation elements. After this, you should carefully tighten the terminal fastening.

If there is a problem with the battery being completely discharged (for example, the headlights were on all night), it should be charged, unless we are talking about lead batteries. In the winter season, there are often frosts in many regions of our country. The car should be especially taken care of during this period. Many Oka owners take the battery home with them. Thus, being in a warm room, it will not discharge and the car will start without problems in the morning.

No spark injector

It is recommended to use a spark gap to understand at what stage there is no spark on the spark plugs (no spark from the distributor, no spark from the coil, or directly from the spark plug itself). If there is no spark in all cylinders at the same time, there may be several culprits:

• controller;
• entire module;
• coil or center wire.

If there is no spark from the ignition coil, then the reason may be hidden in many places. First of all, you need to check the high voltage wire, which must be in perfect condition and without damage to the insulation. Otherwise, the wire needs to be replaced.

No spark, check spark plugs

If the problem is not solved, then check the spark plugs. The spark plug contacts must be clean. The fact that there is no spark may be caused by dirty spark plug contacts. It is best to replace the spark plugs, but you can also clean the contacts. But before changing the spark plugs, check whether the discharge reaches the spark plugs themselves. To do this, remove the spark plug wire and bring it to the car body at a distance of 0.5 cm. Turn the starter several times and see if there is a spark between the wire and the body. The spark should be white with a slight blue tint. If it is absent or present, but with a different shade, we can say that the spark plugs are fine, and the problem is in the heart of the car’s ignition system – the coil.

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How to start a car in winter

If the Oka does not start when cold, you should perform several actions:

• Carefully turn the ignition key to turn on electrical appliances.
• Take a break of a few seconds to allow all systems to prepare to turn on the engine. After this, you should turn the key all the way and hold it for no more than five seconds. If the Oka does not start and stalls, then you need to wait about a quarter of a minute and start the engine again.
• You can easily understand that it has started (by sounds and vibration). In the frosty season, it is recommended to turn the key to the indicator that electrical appliances are turned on and wait about a minute. Then turn on the ventilation, and then press the gas pedal about three times. The colder the engine, the longer it will take to start. The ventilation system does a great job of “waking up” the car, and pressing the gas pedal will clear the carburetor of excess gasoline.

Preparing the walk-behind tractor for start-up

In the instructions, manufacturers always indicate how to start the walk-behind tractor correctly. However, not everyone wants to waste time reading long pieces of paper and start work without familiarizing themselves with the operating rules. This is fraught with serious damage. It will not be possible to return equipment that was used for other purposes or broken due to the fault of the owner under warranty. If you never manage to start the engine even after several attempts, the reason may not be a bad part.

To make sure that the walk-behind tractor engine or starting system is faulty, you must try to turn it on, following the instructions exactly. If the reason turns out to be incorrect actions, there will be no need to contact for repairs. Sometimes it happens that the MB does not start and immediately stalls due to a manufacturing defect. In this case, you can safely go to the warranty center to process a return.

When communicating with an employee, it is important to inform that everything was done according to the instructions and a breakdown could not have occurred due to the owner’s fault.

To start the walk-behind tractor:

1. Check the oil level, even if it was filled just a day ago. Sometimes sellers convince you that the required amount of liquid has already been poured into the tank. You can’t trust words, because... An attempt to start a walk-behind tractor without oil will lead to breakdown and will not be accepted under warranty.
2. Fill with fuel. The method for opening the tank varies depending on the model, so you need to read the instructions. For some types of engines, gasoline must be mixed with oil. The proportions are also indicated in the technical book.
3. Open the petrol tap. Before doing this, you must move the pump lever to the “Start” position. The name varies depending on the manufacturer.
4. Pump fuel from the tank using the starter and turn on the ignition. Then you need to pull the starter and move the choke lever to the “Operation” mode. If everything is done correctly, the walk-behind tractor will start.

The described scheme of action is relevant for a gasoline engine without an electric starter, for example the Lifan model. To start a diesel walk-behind tractor, you will have to spend more time. The main problem of such equipment is its instability to frost. When the outside temperature drops, the fuel freezes, so the MB has to be warmed up before starting. The first attempt to turn on may fail if you do not bleed the system with the starter, because Everything inside is airy. Then pump the decompressor several times. Some models indicate the exact time of such preparation. Usually it is enough to do this 5-6 times, and then pull it to the starting position. If all the steps are completed correctly, to start the walk-behind tractor, just press the decompressor and turn on the starter.

Attention!

If it was not possible to clean the air-filled system by bleeding the starter, you can unscrew the fuel valve and loosen all the supply connecting elements one by one. When the fuel flows out, everything must be returned to its original state.

Main signs of malfunction

Each car has its own specific signs of malfunction. However, in most cases they are all quite similar to each other. The main reasons include the following:

• the engine does not work or works poorly;
• sensations of strong vibrations;
• strong heating of the motor;
• unnecessary, loud sounds when turning on the engine;
• the presence of interruptions and instability in the operation of the internal combustion engine;
• the engine “troits” (malfunction);
• The carburetor is firing.

Irregularities in the fuel system

The operation of the Oka fuel system is to ensure that the mixture is supplied along with air and fills all cylinders with it. An important component that is responsible for the serviceability of this system is the carburetor. How can you identify problems with the fuel system?

• The engine does not start.
• There are malfunctions in the operation of the motor.
• Noticeable reduction in engine power.

The main reason for these problems is severe contamination of the air filters and lack of fuel mixture. If there is no gasoline supply to the carburetor, then first of all it is recommended to check the condition of the fuel pump, pipes, and cleaning filters for damage.

In some cases, it is very simple to correct the problems of poor fuel mixture supply. You should remove the cap from the fuel tank and look at the channel for blockages. If they are present in the tank, there will be a weak thrust for pumping fuel.

In the opposite situation, if fuel enters the carburetor, then the unit should be checked. It includes a large number of small channels, the blockage of which will lead to the inability to start the engine. Nevertheless, it is quite possible to solve this problem. The process of cleaning the carburetor and blowing through all channels will help resolve the situation.

The engine only runs on choke, why?

Why does a warm engine only run on choke?

Because either the fuel mixture supplied to it is too lean, which does not allow it to develop the required power and, accordingly, maintain the idle speed within 600-800 rpm, or there is a violation of spark formation on the electrodes of the spark plugs, leading to incomplete or untimely combustion of the fuel mixture, which is so also affects its power performance.

The “choke” handle extended towards itself allows you to close (partially or completely) the carburetor air damper, which ensures forced enrichment of the fuel mixture by reducing the proportion of air in it and maintaining minimum idle speed.

The reasons for the engine running only on choke are related to the carburetor and the power system

Using the example of engine 21083 of VAZ 21083, 21093, 21099.

The carburetor idle system (IAC) does not work

The fuel mixture does not enter the engine when the vehicle is idling, either at all or only partially. Reasons: the CXX is completely clogged, the CXX fuel jet is clogged, the solenoid valve or the EPH system is not working, the correct position of the throttle valve of the 1st chamber or the carburetor air damper is not correct.

Read more about how to diagnose and troubleshoot the idle system of the Solex carburetor 2108, 21081, 21083: “The idle system of the Solex carburetor does not work.”

The fuel pump does not pump

The supply of gasoline to the carburetor is disrupted; the fuel mixture at the outlet is lean. Reasons: fuel system filters are clogged (in the fuel pump, fine fuel filter, filter on the fuel intake in the gas tank), the fuel pump valves are faulty, the fuel pump drive is not adjusted (the pusher is worn out).

Damaged engine power system

Fuel from the gas tank is supplied in incomplete quantities or not at all. Reasons: system filters are clogged, the fuel intake in the fuel tank is clogged, fuel lines are damaged (broken, deformed).

“Suction” of foreign air into the carburetor

Excess air entering the fuel mixture through leaky carburetor seals leans the fuel mixture. Possible places for excess air to “suck in” are the gasket under the carburetor, the rubber o-ring on the fuel mixture “quality” screw, the o-ring on the EMC.

How to deal with this malfunction and find the place of the “suction”: “Suction of foreign air into the carburetor.”

The reasons for the engine running only on choke are related to the ignition system

The ignition timing is incorrectly set

Ignition that is too early or, conversely, too late does not allow timely ignition of the fuel mixture in the combustion chambers. In this case, the resistance to rotation of the crankshaft increases to such an extent that the engine can start and operate only on “choke”, which makes it possible to somehow compensate for the loss of power by additionally enriching the fuel mixture.

Parts of the ignition system are “broken”

A short circuit in the elements of the high-voltage circuit of the ignition system (spark plugs, high-voltage wires, distributor cover) leads to a disruption in spark formation on the spark plug electrodes. The spark periodically disappears and its strength decreases. This does not allow the fuel mixture to be effectively burned and the engine to reach the required idle speed. Power losses can only be compensated by forced enrichment of the fuel mixture by pulling the “choke” handle towards you.

The timing belt jumped or was installed incorrectly during replacement (the position marks of the camshaft and crankshaft have shifted relative to each other).

Ignition system problems

Ignition involves supplying a spark using spark plugs to ignite the fuel mixture. If the problem lies in this system, then you can detect unstable operation of the engine (due to the fact that 1 or more cylinders are not working) and a decrease in energy.

It is recommended to check the spark plugs from time to time. There may come a time when the candles have already failed. Then the car will not start due to problems with the engine. The situation can be corrected by replacing all existing spark plugs.

A hot engine stalls while driving or idling

Let's start with the fact that the symptoms and signs of this problem can manifest themselves in different ways. Quite often, the power unit may stall in idle mode, and unstable operation and complete stop of the internal combustion engine often occurs after the engine has warmed up.

First of all, diagnostics should begin with checking the spark plugs and their condition. At the same time, high-voltage armored wires should also be checked. This must be done because there may be weak sparking or no spark at all on the spark plug electrodes. Interruptions in the spark lead to serious malfunctions in the operation of the engine, as a result of which both the cold unit and the engine stalls after warming up. Replacing spark plugs and high-voltage wires often helps solve the problem.

Another common situation is when the engine stalls hot or cold immediately after starting it. In this case, on many modern cars with an injection power system, you should check the idle speed sensor. The failure of this element of the electronic engine control system often leads to the fact that the engine is simply unable to operate at idle speed.

In some cases, cleaning the XX regulator helps, in others the device should be replaced. On cars with a carburetor, the idle jets may become clogged and other carburetor malfunctions may occur. Injection engines also require additional checking of the synchronization sensor (DSPS), and possible problems with the fuel pump should not be ruled out. One way or another, if the engine stalls when hot or this constantly happens with a cold unit, then in-depth diagnostics will be required.

On carburetor cars with a mechanical ignition distributor, a situation arises when the slider stops performing its functions. Quite often, after the engine has warmed up, the central wire on the ignition coil may come off, problems with the ignition unit capacitor, etc. may occur. A known problem with cars with a mechanical fuel pump is that the engine stalls in hot weather. This occurs due to overheating, since the high temperature outside and significant heating of the engine compartment do not allow the pump to cool properly.

At the same time, attention should be paid to the condition of the fuel filters. If the filter element becomes clogged, then as the load increases and the speed increases, the required amount of fuel does not flow into the engine through the dirty filter and the engine stalls.

We add that usually before a significant decrease in the filter capacity and a complete stop of the motor, the malfunction progresses. At first, the car may not pick up speed, starts poorly, dips appear when you press the gas pedal, the engine is unstable or jerks when you press the accelerator, in transition modes, etc.

Modern cars with an injector have an electronic control unit (ECU). This unit is quite rare, but still fails. In this case, the engine may stall while driving, and the problem itself manifests itself in various situations, including after the internal combustion engine has warmed up. In this case, as well as if it is necessary to check individual ECM sensors, it is necessary to carry out computer diagnostics of the vehicle. The system will display existing errors in the form of codes, after decoding which it is possible to localize the fault. If the problem is “floating”, that is, it occurs periodically, then it is recommended to purchase a compact device that allows you to read information about engine operation via the OBD connector. Thanks to the subsequent display of data on the screen of a smartphone, tablet or laptop with a pre-installed program, this solution will allow you to record failures in real time.

Cooling system

The job of cooling is to maintain a stable temperature in the engine. The system consists of several nodes. The main problems with lack of cooling are as follows:

• Presence of cracks in the pipes.
• Unstable thermostat operation.
• Pump malfunction.
• Radiator honeycomb clogged.
• Unstable operation of the temperature sensor.

When the pump fails, uncharacteristic sounds appear in the engine. Traces of oil leaks are also formed. This problem can be solved by replacing the cooling system.

Clogged radiator honeycombs lead to improper heat exchange operation. Because of this, the engine may overheat greatly and subsequently not start at all. The situation can be corrected by thorough washing. However, if this does not help, then the elements of the cooling system are replaced.

Equilibrium mechanism

This mechanism is designed to reduce strong engine vibration. The design is quite strong and reliable. The main failure is a broken gear. The situation can be resolved by replacing the toothed disc.

As a result, it should be said that most of the above situations can be avoided if quality maintenance is carried out on the car and, in particular, the engine. The Oka is considered a rather capricious machine, so it is recommended to constantly monitor and care for it so that it is always on the move and helps out at the right time.

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