Reasons why the injection VAZ 2114 does not start » NaDomkrat

• VAZ 2114 does not start when cold - the main reasons
• Electrical problems
• Problems with the fuel supply system
• Other reasons

Perhaps, many motorists have encountered the problem that the VAZ 2114 does not start when cold or starts with great difficulty (moreover, this problem is typical not only for the 14th, but also for other AvtoVAZ models). It is not always possible to immediately find the cause of such a malfunction, because a variety of vehicle systems may be to blame.

We’ll talk about how to quickly detect and eliminate such a nuisance in today’s article.

VAZ 2114 doesn't start well

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:

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

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

Weak battery or oxidized terminals

The starter does not turn - this is another common problem. Its cause may be deposits or corrosion on the battery terminals or a dead battery.

Remember that the generator will not be able to charge the battery completely and from time to time it is advisable to charge it from the mains. This will help it not lose its capacity and increase its service life.

If you notice that the terminals have strange deposits on them, you should clean them and treat them with a special lubricant that will prevent a similar problem from occurring again.

Checking the air filter

Often, a problem with starting an engine is the appearance of a blockage in the air transport system, which prevents the full formation of the air-fuel mixture for the power unit.

As a rule, drivers on Sanyeng Kyron often forget to replace the air filter, which leads to a decrease in air supply to the fuel system. The service life of the air filter on the Kyron is 20,000 km, after which it is recommended to replace the component. However, in practice, it is advisable to change the air filter every trip on a dusty road - operating a vehicle in rural areas or on unpaved roads quickly leads to clogging of the filtration system.

Note! It is strictly not recommended to install a zero-resistance air filter on the Kyron in order to increase the power potential of the engine. There is no practical value from such tuning, however, reducing the filter base makes it easier for small abrasive particles to access the engine chambers, shortening the service life of the power plant. Sanyeng Kairon has a negative reaction to such tuning.

INDEPENDENT DIAGNOSTICS IN THE GARAGE

If you have problems with the operation of the injection system, you should first diagnose the ECU. In this regard, the owners of the VAZ 2114 are more fortunate with the German VDO instrumentation - it has a self-diagnosis mode. On cars with a dashboard from Schetmash there is no such functionality.

VDO dashboard for VAZ 2114

Working with the self-diagnosis mode on the VDO panel is carried out according to the following algorithm:

• With the ignition off, hold the odometer button for several seconds;
• turn the ignition to position “1”, release the button;
• if the arrows start running on the display, everything is fine, press once (information message about the firmware version) and release, with a second press an error code will appear;
• You can reset the error by holding the button until “0” appears.

Injection problems that cause the car to stall can be indicated by the numbers 1 (ECU error), 14,15 (coolant sensor errors), 22, 23 (DPS errors), 33, 34 (MAF errors), 42 (ignition malfunction) , 44, 45 (lean or rich mixture). The disadvantage of self-diagnosis on the VAZ 2114 is that if there are several errors, the system sums up the codes. Thus, the number “22” may mean a TPS error or low on-board voltage and a coolant sensor error (8 + 14).

For more accurate diagnostics of the injector, you need to immediately contact a service center or purchase a diagnostic scanner (it costs about 1000 rubles).

If you have another car, you can find the problematic sensor by replacing the sensitive elements one by one with known good ones.

Gasoline pump

Gasoline pump VAZ 2114

The pump is located under the seat in the rear of the car. If the pump is working properly when turning the key in the ignition, the fuel pump will make noise. When there is no noise, you need to check the power; read how to do this on the website provaz2114.ru. If the power supply is normal, replace the fuel pump.

Bad ground on the engine

What to do if the VAZ 2114 starts and immediately stalls? It is worth checking the ground on the body and engine. The terminals there may oxidize or rust. Check their condition, if everything is normal, it is worth checking the wires for integrity.

An undercharged battery may be due to poor mass conductivity through the engine. To avoid such problems, after cleaning and checking, it is worth treating all connections with a special lubricant.

conclusions

For VAZ-2114 owners, the situation when you have to turn the starter for a long time when starting the engine is a fairly common occurrence. The reasons are discussed above and may relate to many systems: fuel, engine power system and others.

We have already written in more detail about when the starter does not turn at all.

Content

Sometimes car owners are faced with a situation where the VAZ 2114 has difficulty starting when hot. This means that a car with an already warmed-up engine cannot start. This problem is considered one of the typical ones for the VAZ-2114 and its predecessor, the VAZ 2109. To find out what exactly is the reason, you should examine all the vulnerable spots in the car.

2114 does not start when hot

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.

Main reasons and methods for solving them

Healthy! Maybe you are lucky and resetting the injector errors will help. To do this, you first need to remove the negative terminal from the battery. If after 5-10 minutes the car starts as well, then this is not the problem.

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.

Starter mechanisms (brushes, bendix)

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.

Incorrect sensor readings

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):

1. Speed ​​sensor.
2. Crankshaft position sensor.
3. Idle speed sensor.
4. Phase sensor.

Wires, filter and spark plugs

Clogged air filter

• High-voltage wires are broken, poor contact on the tips (oxidation). During a visual inspection, it is rarely determined whether the best option is to replace it with new or known good ones. Before replacing, you can clean (blow out) the contacts on the old wires.
• The spark plugs are flooded, mechanically damaged, or the gap is set incorrectly. If necessary, the following is done: new ones are screwed in, the required gap is set, or the old ones are returned to their place.
• The air filter is clogged, causing the air supply to the engine combustion chamber to deteriorate. It is recommended to replace with a new one.

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).

If the result is different, the situation requires replacing the fuel pump.

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

In this situation, replacement of the piston rings is required, and perhaps a major overhaul of the engine.

Possible consequences of long starter operation

When the starter is turned for a long time, the greatest damage is caused to the battery and starter. The first one loses its charge very quickly. When starting the engine, the starter consumes a lot of current, so the battery consumes most of its charge, which is then (after the engine has been started) replenished by charging from the generator.

Bendix failure

Old and new Bendix

With each such idle start, voltage from the battery is supplied to the bendix, which begins to rotate the shaft until the engine starts. At this moment, the splines on the bendix are severely worn out, and the bearing may also crumble or hum.

In these cases, there is only one way out - replacing the starter with a new one.

6. Crankshaft sensor malfunction

If you are looking for the answer to the question “why does the VAZ 2114 stall when cold,” then pay attention to the crankshaft sensor. It is responsible for controlling ignition and fuel, and if its operation is disrupted, then processes in the engine will occur at the wrong time. You can easily diagnose the problem thanks to the check - if there is a malfunction, it will blink or light up. To replace the sensor, it is better to contact a service center. You can do this yourself, but it is advisable to drive onto an overpass or pit for convenience.

Less commonly, the mass air flow sensor fails, which will affect engine performance.

Ignition module

Another problem is the ignition module. This malfunction was more common on cars of the Samara-1 generation. In the case of Samara-2, the quality of the part itself has improved, but the root of the problem remains. The module is attached to the cylinder block, which causes it to get very hot and burn out the windings. As a result, when hot, it is possible to lose spark in one, several or all cylinders at once.

If the car does not start when hot, check the spark. If it doesn't, that's almost certainly the problem. You can usually resolve the issue by replacing the module, but if the problem returns, consider moving the bracket to another location. Most often it is installed in the front part of the engine compartment, near the radiator.

Most problems with poor engine starting when hot are solved using these methods. But less probable ones are also possible: broken wiring, ECU malfunction, etc.

Engine starting

There are several fairly simple rules, following which you can relatively easily start your car engine in cold weather.
Before starting, you should, as they say, wake up the battery. To do this, just turn on the headlights on high beam for just a few minutes. Then, turning on the ignition, you need to wait 10-15 seconds. During this time, the fuel pump will have time to pump fuel into the injection engine. After this, they press the clutch - the starter turns a certain number of parts, and this action will reduce their number and reduce energy consumption.

The timing marks are off

Another problem that the engine on a VAZ 2114 is difficult to start can be a skipped timing belt. This happens when there is poor tension or excessive wear. A discrepancy of more than two teeth will be significantly noticeable in the operation of the motor.

To check the mechanism, it is enough to remove the timing belt protective cover. Afterwards we mark it and check it.

If a discrepancy is found, repairs will have to be made. It is better to contact a good service station with this problem.

When faced with the problem of poor cold starting with a VAZ 2114, you should not hope that normal warming up of the engine will help fix it. Cars of this brand are quite simple, and if any problem arises, it should be looked for in the mechanics, since there are not many electronic systems here.

Electrical problems

If you notice that your VAZ 2114 is difficult to start, then first of all you should check the main electrical components and assemblies that affect its operation.

These include:

• starter;
• spark plug;
• throttle;
• electronic control unit.

In this case, the check should begin with the candles.

Plaque on the spark plug body

Before you begin troubleshooting, you should check the condition and charge of the battery. If it is too discharged, then this can cause poor starter performance and, as a result, difficulties when starting the engine.

If the battery is in perfect order, then you should carefully examine the spark plugs. The presence of oil, carbon deposits, or colored spots on them may indicate that they are faulty. In this case, there are two options for solving the problem - either clean the existing spark plugs (for example, calcinate them or clean them with fine sandpaper and solvent) or replace them with new ones. The last option is the most preferable, since only it will help you find out for sure whether the spark plugs are to blame for the malfunction or not.

It should be remembered that when replacing spark plugs with new ones, all 4 spark plugs should be replaced. This is done even if only one candle fails.

If upon inspection it turns out that everything is in order with the spark plugs, then you should check the high-voltage coil. This can be made easier by replacing it with a new, similar one. If the ignition coil (or rather the block) is working properly, then you should proceed to diagnosing the starter.

Starter for VAZ 2114

Checking the starter consists of carefully inspecting it and monitoring the condition of the main elements - the degree of wear of graphite brushes, brass bushings, etc. In addition, you should check the starter using a multimeter (tester), “ringing” it between one of the brushes and the armature. If the tester shows an open circuit, then there is a break in the winding and the part will have to be replaced.

Another reason why the VAZ 2114 does not start well with a cold injector may be a malfunction of the electronic control unit. Checking it at home is extremely problematic, since you will need special diagnostic equipment.

That is why you should either contact a service center to check the ECU or try replacing the unit with another one and try to start the car again. If the car starts right away, then the problem was in the block. In this case, you will have to either buy a new ECU or reflash the existing one (for this you will also need to contact a car service).

Fuel system

If it is below -20 degrees outside the window, it is possible that condensation has formed in the tank. The presence of water in gasoline is a bad sign. Moreover, it is not necessary that it be “diluted” at the gas stations themselves. Due to the temperature difference, condensation forms on the walls of the tank. At low temperatures it freezes. As a result, the VAZ-2115 (injector, 8 valves) does not start. Frozen water can be both in the fuel lines and in the filter itself. There is no point in trying to turn the starter with the hope that the car is about to start. You'll just drain the battery. The only solution to the problem is to warm up the car. It's better if it's in a garage with this problem. By installing an oil or induction heater there, you will quickly warm up the air temperature in the room. And the car will start successfully.

Why does the VAZ-2115 catch but won’t start and what to do

Quite often, owners are interested in why the car does not start during startup, even though the starter turns as it should. It is worth noting that such problems usually arise with products from the Volzhsky Automobile Plant. Quite often the following happens - the VAZ-2115 seizes, but does not start. As practice shows, such a nuisance usually occurs at the most inopportune moment, when the car is far from car services. Such a breakdown can occur at any time of the year, and under a variety of circumstances.

It is for this reason that any car owner needs to know why this happens and how to fix the problem. In fact, in some cases, failure to start the engine is caused by a fairly easily repairable breakdown that even an inexperienced driver can handle.