Reasons why the injection VAZ 2114 does not start » NaDomkrat

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.

The starter works, the engine turns, but the car does not start

So, the starter spins, the engine spins, the pistons move, but the engine still won’t start. Here the problem is most likely in the fuel-air mixture, perhaps the marks have come off, etc.

Before sinning on the fuel-air mixture, the first thing you need to pay attention to is the crankshaft sensors:

DPKV - if it malfunctions, it is very difficult to start the engine, and the running engine runs unevenly, intermittently, and the power drops noticeably.

Next you should pay attention to the labels:

1. Mark on the timing camshaft gear (photo).
2. Markings on the flywheel under the thermostat (photo).

If the marks do not match, most likely the belt has simply slipped by one tooth, the camshaft gear itself may be worn out, it needs to be adjusted and installed correctly!

Next we will talk about the air-fuel mixture.

I warn you in advance that the easiest way is to do computer diagnostics of the engine or look at the errors on the on-board computer.

The air-fuel mixture is the combination of air, gasoline and the spark needed to ignite it.

Air supply

As a rule, a malfunction in the air supply should not affect the problem of starting the engine. For better or worse, the engine should still run. However, we will not go through the air system sideways.

We recommend: Official Chery dealer

The following sensors are responsible for air metering and supply:

1. Mass air flow sensor is the most expensive sensor; if it fails, then the car simply begins to consume liters of gasoline, then this sensor can simply die “to zero”, but it indirectly affects the starting of the car. That is, no matter how it fails, the car should start.
2. IAC - should not affect the problem of starting the engine. If it malfunctions, problems arise at idle.

Spark

Here may be the real reasons for our problem:

1. First of all, we look at the candles. We turn the candles out (How to remove the candles?) and look at their condition:

A normal spark plug should have a slightly brick color; if the spark plug is wet, the spark plugs are flooded; you need to clean and bleed the cylinders by cranking the engine at idle with the starter with the spark plugs turned out. If one cylinder is flooded - the problem is local (High-voltage wires, faulty spark plug, injector), all cylinders are flooded - a general problem (ignition coil, brains, oxygen sensor, fuel pressure in the rail)

2. Next, check for the presence of a spark. To check the spark, see the following article: How to check the spark?

• If there is no spark on one cylinder, there is a faulty spark plug or high-voltage wire.
• If there is no spark on two adjacent cylinders (1-4 or 2-3), then the problem is in the ignition coil or in the ECU.
• If there is no spark anywhere, then the problem may lie in the ignition coil or in the ECU, in mismatched timing marks, or in a non-working DPKV.
• If there are no problems with the presence of a spark, then the problem lies in the fuel supply.

Fuel supply

Two points are very important in fuel supply:

• normal fuel pressure;
• working injectors.

If, when you turn the key into the ignition, you do not hear the fuel pump pumping, then therein lies the problem. If the pump pumps, then first of all we measure the pressure in the fuel rail: How to measure the pressure? and draw appropriate conclusions.

High fuel rail pressure coupled with a malfunctioning fuel pressure regulator can flood your engine in an instant.

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.

VAZ 2114 does not start well - is it an electrical fault?

Electrical wiring VAZ 2114

A malfunction in the electrical part of the car, for some reason most of the problems lie here, so we will dwell in detail on each option here:

1. On a VAZ 2114, this usually indicates a violation in the ignition switch - starter line, but one of the reasons for the breakdown “for blondes” is a dead battery, do not forget about it (checked with a voltmeter: it should be at least 11.8 V - and with a hydrometer, if the battery is serviceable : at least 1.22 in each jar). Let's move on. The cause of such a malfunction may be a breakdown of the ignition switch cylinder, and the injector has nothing to do with it. If, when turning the key, new sensations arise (something catches, turning has become easier or, conversely, more difficult), that’s the problem.
2. Under the panel, approximately above the clutch, there are two relays: ignition switch and starter release. The reason may be a malfunction of one of them. They are checked according to the manual by a good electrician or replaced with a known working one.
3. Starter. Often the cause may be a jammed “retractor”. If you are standing in a field, you should try hitting it with something heavy like a large key (without fanaticism) - it may help. If the car is parked in a garage, you should remove the starter and try to start it directly from the battery. To do this, press the housing to the zero terminal of the battery, install the wire with the alligator clip on the positive terminal of the battery and bring it to the positive of the retractor. If the starter makes an attempt to jump out of your hands, everything is fine (be careful, it is not recommended to carry out this procedure without basic knowledge of safety precautions and an assistant!). If there is no reaction, the problem is in the retractor. If the relay buzzes, but the starter does not turn, the problem is in the brushes. If the starter makes a terrible sound, but does not turn, the problem is in the bendix. If the starter turns, replace the battery and check the power supply to the chips that are connected to the starter (with an assistant, one turns the key, the other measures it with a multimeter).

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.

Electricity problems

If fuel is supplied to the engine, but starting does not occur, you should look for an electrical failure.

First of all, you need to inspect the ignition. May not work:

• candles;
• coil;
• spark distributor.

It never happens that all nodes fail at the same time, so it is necessary to talk about each of them in more detail. In particular, if there are no problems with the ignition distributor, then most likely there is a breakdown of either the slider or the cover. The engine may not start due to a Hall sensor failure.

But the most common problem is improper contact at the supply terminal of the ignition distributor. However, the problem often arises due to the inability of the coil to produce the required voltage. As you know, the injector works together with the ignition module. There are two of them in the engine design. The first is in charge of the functioning of the 1st and 4th cylinders, the other, respectively, of the second and third.

As a result, even when the spark plugs are dry, a spark does not appear on them.

It may well be that the problem arose in the ECU, since it is in charge of generating commands for each installed system, and ignition is no exception. The only way to check the functionality of the on-board computer is to replace it with a known working unit. The suitability of the ignition module is checked in the same way.

If, however, a breakdown occurs in the coil, then a fairly simple test will allow you to verify its malfunction. The spark plugs are unscrewed from their sockets without removing the wires and placed against the ground of the car. Next, turn the starter. If a spark does not appear, it means that the coil has become unusable and cannot produce enough voltage to ignite the fuel.

It is also worth pointing out that the reason why the car does not want to start sometimes lies in the spark plugs themselves. It is this element that is responsible for the ignition of the fuel-air mixture. During operation, their metal parts burn out, which leads to an increase in the gap. The latter circumstance often either complicates the launch or makes it impossible. You should check the gap more often, and then no problems with the spark plugs will arise.

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.

What to do if the starter spins for a long time when starting the engine

Despite the fact that starting the engine falls almost entirely on the starter and battery, we must not forget about other elements that are involved in solving this problem. The following are the most common reasons why the starter spins for a long time when starting the engine:

The above are the most common problems for any type of engine, but we can also highlight characteristic malfunctions for injection and carburetor engines.

The starter spins for a long time on an injection engine

A typical problem with an injection engine, due to which it takes a long time to crank the starter to start the engine, is an error in the on-board computer. This problem can be solved in two ways:

The starter spins for a long time on a carburetor engine

A tool for diagnosing problems in a carburetor engine are spark plugs. They need to be unscrewed and the condition of the electrode inspected, by the color of the deposit on which you can determine the presence of problems in the engine:

If the starter spins for a long time when starting the engine, first check the battery, and only then all other engine components. In most cases, it is the lack of battery charge that causes difficulties when starting the engine.

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.

Possible reasons why a VAZ-2109 car is difficult to start when cold

It should be immediately noted that when searching, you should definitely take into account what kind of engine you have.
Of course, there are common reasons, but the search algorithm for an injection engine (16 valves) will be slightly different from a carburetor engine. The first option, as you know, was put on the “nine” of later issues. Most of the cars in this family were equipped with carburetor engines (8 valves). As mentioned above, it is simply impossible to give an exact answer to the question why the car does not start well when cold. Generally speaking, the main reasons are as follows:

It should also be noted that if you have an LPG system, then the car needs to be started on gasoline, not gas. A problem with the operation of the fuel pump cannot also be ruled out. The most common reason is a dead battery. It's very simple to check this - turn on the headlights and see how bright they shine. However, the sound of a rotating starter will indicate the problem. The latter, by the way, may not rotate at all. This means that the battery is very deeply discharged.

Now let's look at typical problems for a carburetor engine. One of them is the lack of fuel in the float chamber. Accordingly, it should be pumped up using the lever on the gas pump. Also try knocking on the carburetor, it is quite possible that the needle valve needle is stuck in the up position when the fuel supply is shut off. Check the spark plugs - if they are wet, the fuel mixture is too rich. The problem is solved by adjusting the carburetor. By the way, there may be such a reason as the mixture being too lean. In this case, you will also need to adjust the carburetor. You can check high-voltage wires in the dark. To do this, start the car, turn off the headlights and look under the hood. If there is a problem, you will see it immediately. Another option for checking is to borrow a kit that is known to work from someone.

Quite often, problems such as a clogged fuel jet of the idle system or a malfunction of the solenoid valve occur. It is also recommended to inspect all hoses and tubes leading to the carburetor. It is quite possible that the problem is caused by the leakage of foreign air. You should also not discount the starter itself. Often it is its wear that causes you to be unable to start the engine normally when cold. However, if such problems are not observed when hot, then everything is in order with this unit. In addition, the reasons may be in the distributor, switch, ignition coil or incorrect ignition settings.

Source

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.

We diagnose the starter

Step 1: put the VAZ-2114 on the repair pit.

Step 2: remove the car engine protection.

Step 3: Open the hood.

Step 4: Remove the battery "-" terminal.

Step 5: Disconnect the wiring harness.

Step 6: Remove the crankcase protection.

Step 7: Unscrew the fastening nut to remove the wires from the traction relay.

Step 8: You should also unscrew the two starter mountings from the bottom of the car.

Step 9: Remove the last top fastener.

Step 10: remove the starter (this is done from the bottom of the car).

After removing this VAZ-2114 part, it is visually inspected for the presence of external damage and malfunctions. If everything is in perfect order, then the removed part should be disassembled element by element and a thorough inspection of each element should be carried out:

• unscrew the retaining nut;
• release the solenoid relay from the wire;
• unscrew the bolts securing this relay from the back cover;
• remove the retaining ring, which is located on the back of the rotor;
• Unscrew the nuts from the studs and the bolts securing the wires from the windings to the brush holder;
• remove the brush assembly;
• remove the pin that secures the Bendix fork;
• remove the rotor and stator separately;
• Remove the retaining ring from the rotor.

After all the described operations, you can begin to inspect the overrunning clutch and gearbox, namely the gears that are part of them. It’s worth immediately inspecting other elements of the starter that affect the functioning of the vehicle as a whole. Experts include irreparable breakdowns of the main elements of this part:

• rotor failure;
• stator failure;
• destruction of the rotor and/or stator windings;
• broken bushing.

In these cases, it is better to replace the old starter with a new one than to repair it.

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.

Other reasons

It would seem that the bulk of probable malfunctions have already been listed, as well as methods for eliminating them. But it should be remembered that, in addition to problems with the fuel system and electrical systems, other factors can be the reasons for poor “grasping” of the engine. And the most common ones are bad fuel and unsuitable oil.

So, if you notice that the car has difficulty starting when cold, then try to refuel at other gas stations (preferably not just at others, but at gas stations from other companies). In some situations, this alone may be enough to solve the problem. The same applies to butter.

If summer oil is used in cold weather, this can also lead to poor engine performance at start-up. It is worth remembering this and always change the oil according to the current season.

Poor fuel quality

Another source of trouble can be electronic sensors, and most often the crankshaft position sensor. It is he who transmits information to the controller, on the basis of which the ignition and fuel injection are controlled. It is very easy to find out about its malfunction - in this case, the check engine icon will light up on the dashboard. In order to check the condition of the sensor or replace it, you will have to contact the service department.

Crankshaft position sensor VAZ 2114

A faulty intake air volume sensor can cause no less trouble. Its breakdown can lead to serious problems with the ignition, including complete inability to start the car.

It is very easy to check this sensor yourself - just turn it off and try to start the car. If it starts the first time, then the problem was in this sensor, and it will have to be replaced with a new one.

Published August 16, 2018

There can be many reasons why the starter spins for a long time when starting the engine on a VAZ-2114. Without step-by-step diagnostics it is impossible to understand this. But, if you start this problem, the situation can turn into a failure of a certain node.

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.

Correct engine start

There are certain rules for performing such actions during the cold season. If anyone doesn't know them, we will remind you:

• If you managed to get into the car without any problems, which is sometimes also difficult, you should “wake up” the battery. To do this, just turn on the high beam for a while;
• Having turned on the ignition of the injection engine, wait a few seconds to allow the fuel pump to pump gasoline into the system;
• Now you need to depress the clutch pedal, this will reduce the number of parts rotated by the starter, which will reduce the current consumed by the starter;
• Next, you should try to start the engine. The starter needs to be turned on for about 7-8 seconds, no more, so as not to drain the battery ahead of time. If this happens, then read the article “What to do if the battery in your car is dead”;
• If the first attempt was unsuccessful, you can try to launch 2-3 more times, no more.

If after all attempts you cannot start the engine, it means that there are some problems that need to be found and eliminated. Most often, flooded spark plugs are to blame. Try burning them on a gas stove or installing other, known-to-be-good spark plugs. It should be remembered that frequent use of burning filled candles accelerates their wear.

Sometimes, when cranking the engine with the starter, signs of engine performance are observed; you can open the throttle valve, sometimes this speeds up the starting process. When the start is successful and the engine is “rumbling”, do not rush to release the clutch pedal, let the engine spin up a little and only then slowly release it, be prepared for a situation when the car starts moving with the gear off.

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.

General faults

It is necessary to distinguish between situations when the car simply cannot start, and when the VAZ 2114 does not start when it is hot. In the first case, the reasons may not be related specifically to a warm engine.

The most common faults include:

1. The battery is low - the charge level is not enough to start the car again.
2. Problems with the starter - its speed drops, or the relay needs to be changed.
3. Poor quality fuel - as a result of using gasoline with impurities, fuel system valves or injectors may become clogged.

   
   Checking the injectors of the VAZ 2114

Important! If black or white residue accumulates on the spark plugs, there may be problems with the ignition system, fuel system filters, or fuel pump. Therefore, when a plaque is detected, the car needs diagnostics.

Another common reason that the engine does not start, either hot or cold, is problems with the ignition module. This is due to a design solution - the ignition system module is attached to the car’s cylinder block. If the windings get too hot, they may burn out. As a result, the spark does not reach one or several cylinders at once.

To check the serviceability of the VAZ 2114 ignition system, you need to:

1. Check the sparks on the spark plugs - the absence of a spark on several spark plugs at once can cause problems with starting the engine, and indicates a problem with the operation of the module.
2. Inspect the high-voltage wires - if there is no spark on one spark plug, this indicates a possible wire break. Therefore, it is necessary to inspect the wires for mechanical damage.

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.