VAZ 2114 won’t start: looking for the main reasons

Failures in the fuel system
No ignition when turning the key
No spark at the spark plug
There is a spark, but the engine does not start
Useful tips
Useful video

A car that cannot be started is completely useless, since it cannot fulfill its main task of transporting people and luggage. For example, there are many reasons why the VAZ-2114 does not start, and all of them require a thoughtful approach and experience in repairs.

VAZ 2114 will not start

Failures in the fuel system

It’s worth noting right away that there is no point in considering major engine breakdowns, since the average driver will neither be able to diagnose nor repair them, so you should pay attention not to those faults that can be eliminated with your own hands or in a short time.

For example, if a VAZ-2114 does not start, it is worth checking its fuel system, and first of all, you need to take care of the following aspects:

presence of fuel in the gas tank (the sensor may be wrong);
the integrity of the gas pipelines running along the bottom of the car from the tank to the engine;
serviceability of the coarse filter in the fuel tank;
the serviceability of the fine filter in the tank below, near the spare wheel.

Controller and fuel pump relay VAZ 2114

Of course, both the fuel pump itself and its relay can fail, which can partly be attributed to the car’s electrical network. You can determine the breakdown yourself by listening after turning the key in the ignition to the characteristic sound of fuel pumping - if there is none, the pump, relay or wiring is faulty.

Additionally, according to the instructions, you can connect a pressure gauge to the fuel network, measuring the fuel pressure in it: a reading below two and a half atmospheres will indicate an unlikely leak. In such a case, you will need to look for leaks in the tank and gas lines - for this it is better to drive the car into a pit.

Gasoline pump VAZ 2114

Unlike the coarse filter, the mesh in the tank under the bottom of the VAZ-2114 may well become clogged and littered, so it is worth checking it first if other faults are excluded.

Main reasons and methods for solving them

Figuring out why the engine stalls is not difficult. In addition to typical problems, the following types of problems may be present:

timing belt is broken;
the engine “knocked”;
the shaft is jammed.

A fairly common problem, especially on 16-valve engines, is a broken timing belt. In this case, the valves on the VAZ 2115 bend. Such breakdowns not only lead to the inability to start the engine. But they require a complete engine overhaul. The situation is similar if the engine knocks. If you can’t start the car even when it’s hot, you should check the air supply channel. Moreover, starting is not always possible the first time.

https://www.youtube.com/watch?v=ytdevru

There are many nuances associated with setting the ignition and ensuring normal engine operation. You will need to carefully understand all the subtleties and nuances. Many problems associated with the inability to start the VAZ 2115 engine are associated with typical malfunctions and repairs take a minimum of time.

Check engine light is on

Difficulty starting the engine is influenced by a number of simple reasons, which you can eliminate yourself in the garage, having a standard set of tools with you.

In the process of rebuilding the starter. The arrow indicates worn brushes.

On used cars, the brushes on the starter wear out. In this case, you need to remove the cover and replace them with new ones;
A starter that has been in use for a long time can be sorted out, cleaned all the mechanisms, washed with WD-40 and filled with new lithol, since the old one is most likely coked and formed into balls;

Fuel problems

In the process of replacing the fuel pump grid. On the right is the old one, and on the left is the new coarse mesh

Small particles of debris getting into the gas tank. This problem is treated by cleaning the fuel system and replacing the filter.

Location of the phase sensor under the hood

Failure or incorrect signal supply from the sensors to the ECU (their diagnostics are required, and if a malfunction is detected, replacement with new ones):

Gasoline pump

The fuel pump is located under the rear seat

The fuel pump does not provide the required pressure, which is why the injectors do not spray fuel, but simply splash it. In order to discard this option, you need to measure the fuel pressure with a pressure gauge (the nominal one should correspond to the norm of 3.2 bar).

Engine failure

Reduced compression in the cylinders is one of the most terrible situations for a car owner. In this case, flammable gases enter the crankcase, and new vapors do not ignite.

Preparing to measure engine compression

No ignition when turning the key

The second broad area of searching for the problem is the electrical system of the car, due to a malfunction in one of the components of which the VAZ-2114 does not start and does not respond at all to turning the key in the ignition switch. To begin with, just in case, it’s worth checking the functionality of the battery under the hood: many drivers, when starting a deep search for a breakdown, forget about such a banal reason for the lack of current.

You must carefully and calmly make sure that the ignition switch itself turns smoothly, without encountering obstacles or jamming, which in theory could lead to an unsuccessful engine start

VAZ 2114 battery

Next, you should turn your attention to more specific components and assemblies, checking their serviceability one by one:

Check the instructions for two relays - the starter and the ignition switch, which are located above the clutch pedal. You can evaluate their performance using the car manual, but usually they are simply replaced with ones that are known to be good for diagnostic purposes.
A faulty starter, or more precisely, a solenoid relay: if it breaks down on the road, you can try tapping it lightly if it just jams. Having reached the overpass, you need to turn it manually - connect the body to zero on the battery, and the other contact to positive.
If the starter actively begins to turn, the problem is not with it; if there is a current supply, but it does not turn, the brushes are broken. Lack of response will indicate a malfunction of the retractor relay, and a sharp and unpleasant sound will indicate a breakdown of the overrunning clutch in the starter.

Starter VAZ 2114

The connection of the contacts itself also requires study, since it is likely that they have broken or oxidized due to moisture - they will need to be cleaned or re-twisted, and then insulated.

Starter diagnostics

If, when you turn the car key to the “Start” position, the car shows no signs of life, then the problem is simple - the starter relay or bendix is faulty. In modern cars, especially foreign cars, starters are very demanding on the quality of lubricant and are extremely sensitive to dirt getting inside. The starter itself is a simple device and can be easily removed from the engine. Understands workshop conditions using metalworking tools.

Before adding new lubricant, you need to clean the old one as thoroughly as possible and examine the starter for deformations, seizing, or jamming. If nothing of the kind is found, the lubricant is replaced, the Bendix clicks, and the starter does not start, then it makes sense to contact a service center.

If there is no Bendix click when you turn the key, the relay is faulty. It is usually located in the same housing as the starter. Therefore, together with the starter inspection, the relay is checked. If the relay malfunctions and it cannot be repaired, the entire starter will have to be replaced.

No spark at the spark plug

Just among all the reasons that the VAZ-2114 turns over but does not start, most often motorists are faced with the absence of a spark at the spark plug. You can check this this way: by unscrewing one spark plug, connect it to a high-voltage wire and carefully, touching only the insulated parts, apply it to the cylinder head cover. At the same time, a second person must turn the starter from the passenger compartment, and if there is no spark, we need to look for the problem.

Difference between new and old candle

If the VAZ-2114 injector does not start, you need to pay attention, firstly, to the ignition module and the chip that is connected to it - these components not only often break, but also often come from the factory defective.

The condition of the crankshaft position sensor should be assessed: by monitoring the phases of movement of the cylinders in the block, it is an important component of the entire ignition system.

Although this sensor does not break down very often, it is necessary to check it, although in the absence of service it is practically impossible to do this - a professional oscilloscope is required.

Finally, a unit such as the electronic control unit of the injector could fail: electronic brains tend to fail on more expensive cars, so it is necessary to organize basic diagnostics for them:

apply a spark to the first and third or second and fourth cylinders;
recognize injection phase irregularities;
As a preventative measure, clean the contacts on the electronic control unit from oxidation.

There is a spark, but the engine does not start

If the starter turns, there is fuel in the tank, the pump delivers it, and the spark plug gives a spark - but the engine still does not start - you will have to turn to more specific units, since this situation is uncommon in the practice of owning a VAZ-2114.

First, you will need to check the injectors: this cannot be done in a garage; you will need to tow the car to a repair shop and clean them with ultrasound. If there is a breakdown on the road, you can easily diagnose faulty injectors - if the spark plugs are dry and not filled with gasoline, it means the injectors are not supplying fuel.

Another thing is that something incredible must happen for them to break in all four cylinders at the same time, and before that they did not force the engine to triple for some time.

Checking the injectors of the VAZ 2114

Even less common are problems with insufficient pressure in the fuel system, caused by failures in various electronic sensors of injection VAZs. In addition to the pump, for some reason the throttle position sensor or mass air flow sensor may fail. The electronic injector control unit will simply not allow the engine to start if at least one of the sensors gives it an error when accessed.

The car doesn’t start well when it’s hot: we look for and fix the problem

Modern cars are gradually moving from the concept of mechanisms to the concept of organisms. This is a highly complex system that requires ideal operating conditions. High engine power, squeezing everything that can be squeezed out of technology, and other features of the modern automobile industry indicate that modern cars must receive maximum care in order to work for a long time.

One of the common problems that arise from improper car care is poor engine starting after it warms up. This means that if you park for a few minutes near the store, you will not be able to start the engine properly. The problem lies in two possible types of breakdowns, but there are also extraordinary cases. Today we will deal with the most common problems in this case, and also talk about specific types of problems.

It should be noted that the symptoms of poor hot starting can manifest themselves in different ways. One car refuses to start at all until the engine cools down a certain amount. Another power unit starts only on the third or fourth try, and the third one simply has to be cranked for a long time to start.

In any case, no matter what happens to your car in this context, you need to find the problem and be sure to fix it. This task is a harbinger of more serious breakdowns, the repair of which will cost you much more money. So let's figure out why the car doesn't start well when it's hot.

Low-quality gasoline or diesel fuel is one of the most common variants of this problem. But in this case, you can conduct an experiment that will show the true problem of your car. The fact is that low-quality fuel with a poor start when hot will have an even more unpleasant effect when starting the engine when cold. Therefore, it is enough to cool the car, wait for the engine to return to normal and start it. The following problems may also occur with fuel:

Gasoline or diesel fuel may contain an additive that your engine does not accept;
diesel fuel has frozen and acquired a jelly-like form, which is difficult to pump;
there are solid particles in gasoline, the filters are clogged, and it is difficult for the pump to pump the required amount of fuel;
the settings of the engine control system and air supply have gone wrong, one of the valves may have broken;
the idle air valve, as well as the mass air flow sensor (mass air flow sensor) can cause such problems;
It’s just a functional feature of carburetor engines - a very hot unit has difficulty starting.

In the case of carburetor units, everything is quite simple - the engine itself starts very poorly when hot. This is due to the fact that after stopping the car with a hot engine, the temperature in the carburetor area is quite high. Under the influence of temperature, gasoline quickly evaporates and fills all chambers and tubes of the carburetor in a gas state.

But the float chamber remains empty. If you decide to start the engine within five minutes of stopping it, you will encounter difficulty starting because there is no liquid fuel in the chambers. The problem can be solved by manual pumping or several attempts to start the power unit. However, there cannot be such a problem with injectors, since the fuel is supplied directly from the main line. Therefore, it is worth looking for other troubles in the fuel supply system.

We mentioned above that problems with starting a car can occur due to the failure of the mass air flow sensor. This element of the car is one of the most sensitive to environmental influences, so they often talk about its breakdown. If starting the engine when hot is very difficult, check the functionality of this mechanism. The following factors may also accompany this failure:

failures when pressing the gas pedal, lack of traction at some moments;
a decrease in power or vice versa - an inexplicable increase in the operating potential of the unit;
complication of engine starting and periodic moments of choking;
explosions inside the exhaust system when the gas pedal is sharply pressed;
unstable speed due to periodic changes in mixture enrichment.

The fuel mixture of gasoline and air must have a certain consistency, which is formed by the mass air flow sensors and some other parts of the electrical and electronic system of your car. If these parts are faulty, you will have to change them and test the car, set up the operation of the new equipment.

Why does a car have trouble starting in cold weather?
Causes:
- bad battery,
- gas pipeline problems,
- old glow plugs.

A picture familiar to many motorists: one fine frosty morning you come to a parking lot or garage. You are trying to make an iron friend, but the attempt ends in failure. As a rule, the reason is that the battery is dead. There are two ways to get out of this unpleasant situation:

- smoke near another car,
— start the car using a pushrod (relevant only for cars with manual transmission).

To start the car using a “light”, you should connect the negative terminal of your battery to the negative terminal of another car with special wires, and then repeat the same for the positive terminal.

The other car needs to be started and given high speed, about one and a half to two thousand revolutions per minute. Wait two to three minutes to recharge the car.

Next, you need to try to start your car, but you don’t need to turn off the assistant.

We recommend putting wires in the trunk for such a case. If the first attempt fails, then after a couple of minutes you can try again. Do not turn the starter for too long, otherwise you can burn out the starter windings, causing it to break.

Useful tips

Additionally, experts advise turning your attention, when all other options have already been excluded, to the timing belt - when replacing it, the technicians could have set the phases incorrectly.

In addition, a banal belt break or excessive rotation is likely.

Very exceptional situations include a skewed cylinder head (for example, due to overheating), impaired compression in the cylinders and misaligned rings.

Gasoline for VAZ 2114

One should not discount such a banal reason as low-quality fuel: in places far from cities, where there is nothing to choose from, cunning entrepreneurs can pour in a completely indecent mixture.

The engine will not start immediately from such gasoline, which will serve as an additional diagnostic sign, and there can only be one solution - drain the low-quality fuel and fill it with normal gasoline. In such situations, however, there is nowhere to take it from, so you will have to rely on a tow truck or compassionate motorists who will stop to help.

Impact of sensors

Most VAZ-2115 cars operate on the “January 5.1” controller. Crankshaft, temperature and throttle sensors are involved in starting the engine.

DPKV malfunctions usually appear regardless of temperature, but it is worth checking its resistance and comparing it with the data in the calibration table.

A more common malfunction is DT. Remove from position and place in a container with a cooler. We measure the resistance with a multimeter: it should be in the region of 1350 - 1880 Ohms. If you have a thermometer, you can check it using the table. If not, it doesn’t matter either, just heat it to an arbitrary temperature. As T increases, the resistance decreases. On a fully warmed up engine it is 87 - 109 Ohms. If the ohms do not change or drop to 0, change the DT.

The throttle assembly is completely disassembled and cleaned. One of the problems is dirt, which expands when heated and interferes with the normal operation of the injection. If the TPS malfunctions, the car not only does not start when hot, but also “does not drive” (sometimes stalls and does not start) after warming up.

The TPS is checked with an ohmmeter with the engine running. Place the multimeter on the input and output contacts, ask an assistant to press the gas. The readings should change and return to their original values at XX. If the resistance does not change when you press the pedal or the device shows infinity, the sensor needs to be replaced. At the same time we check the IAC. It usually causes the car to be unstable at idle or stall but start.

A malfunction of the mass air flow sensor on cars with January 5.1 is recognized by the fact that the car starts when hot and immediately stalls. The sensor comes into operation only after startup. But on a car with January 7.2, the mass air flow sensor is involved in the start - without it the car will not start.

Conclusion

In most cases, when the starter does not engage, this indicates a discharged battery. Even if the battery is still new, it is worth checking first. This can be done using a regular tester. It is also a good idea to make sure the relay is working properly. When starting up, this element must make clicks. Afterwards, you can inspect and “listen” to the starter itself. If the device makes extraneous noise during operation, it will have to be replaced.

By the way, if a 16 valve Nexia stalls, or it doesn’t start well in the cold, then this is very strange and most likely something serious has happened, because this car practically has no problems starting when cold.

Obviously, there are a lot of problems with launching the Daewoo Nexia. Here, by the way, it is worth considering one important point: when assembled in Uzbekistan, the machines are equipped with insufficiently high-quality electrical wiring, which often causes problems. However, if you take into account the price tags for these cars, then, as they say, you can close your eyes to a lot.

Fuel pressure control

The regulator consists of a membrane and a spring. During a malfunction, it may hang open and because of this, the fuel pressure in the system will not be enough for the engine to operate correctly and to start it, so the engine stalls when cold.

To check the functionality of the valve, it is not enough to simply remove the hose from the pump and see how strong the gasoline pressure is. Diagnostics must be carried out with a pressure gauge. There is a special connector for it on the fuel rail. We connect the device and try to start the engine. If the pressure in the system is below 3.6-4.0 atm , this is an indicator of a problem in the fuel supply system.

It is better to replace the pressure regulator in a special service, but if you want to do this process yourself, then follow the instructions:

Disconnect the battery terminal;
Remove the hose from the vacuum brake booster;
Drain gasoline from the system;
After this, start disconnecting the fuel rail from the pressure regulator.
Replace and install everything in place.

If all work is performed correctly, the fault in this part of the system will be eliminated.

Clogged breather

If the car starts and stalls when cold, then perhaps the reason is a clogged breather. The problem occurs due to the high mileage of the car, the use of low-quality oils, or wear of the piston group.

An engine malfunction can be diagnosed using several points:

Increased oil consumption. It is thrown out of the engine into the intake and exhaust;
The spark plug electrodes become oily;
Drives oil out of the engine under the seals and gaskets.

If obvious signs of malfunction are detected, minor repairs will be required. It is necessary to remove the engine valve cover and thoroughly clean it of oil and dirt. It is also worth blowing through all the channels to clean them. Then we put everything back together.