VAZ 2115 does not start injector reasons starter turns no spark

One of the most common reasons causing the inability to start a gasoline engine is the banal lack of spark at the spark plugs. Under such circumstances, there is nothing to ignite the combustible mixture on the compression stroke, and as a result, the engine refuses to work. Depending on what kind of power system the car is equipped with, it is determined exactly how to proceed to determine the exact cause of the lack of a spark and measures to return it. We’ll talk in more detail about this problem on injection engines today. Interesting? Then be sure to read the material below to the end.

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.

Clogged filters

This problem can occur in both summer and winter. And this applies not only to the fuel filter, but also to the air filter. The latter is in a special plastic case. On VAZ 15th model cars it looks like this.

After moving the latches, lift the air filter housing cover and remove the cleaning element itself. If it is dirty, the part needs to be replaced. Filters are consumables and cannot be restored at home. Moreover, they cost pennies. As for the fuel filter, it is located under the bottom of the car. The element looks like in the photo below.

If the car has driven more than 30 thousand kilometers, the filter should be replaced. You will not be able to visually determine the degree of contamination as you can in the air. The part is located in a closed, non-separable case. It has porous paper inside. It is capable of passing particles smaller than 10 microns. Over time, the pores of the paper become clogged, and the filter is not able to pass the required amount of fuel through itself. So that the problem does not take you by surprise, change this part in advance.

A characteristic sign of failure is jerking when moving (as if the fuel supply to the cylinders had stopped for some time). This means that the submersible pump is not able to supply the required amount of fuel through the paper pores. As for the air filter, it is changed every 6 months or every 10 thousand kilometers. By following the regulations, you will protect yourself from such problems.

no spark injector Remzon VAZ

A very good opportunity has arisen to show in practice how to look for a fault on VAZ fuel-injected cars. Here we have a clear, understated nine. Now I’ll show you something else interesting. Problem: won't start. Primary diagnostics showed that there is no spark, and now we will look for the reason. In order to determine the reason, we need to look at the signals on the connector...*. Now let's turn on the ignition and take a look.

We must have a ground indicator on the connector....* On the connector we have plus 12 V and ground, and also two control signals. We can now see the control signals, or should, in any case, see them when the starter rotates. We should hear a squeak. But there are no squeaks, because the control signals also do not arrive, so there is no spark. You can also check the signals on the injectors, but there are none either, so you can’t do without diagnostics and a computer (computer).

As I said earlier, when you turn on the ignition, look at the “Check” light. The light is on, which means the brains are turned on. We also listen to the fuel pump - the fuel pump turns on. And when the starter rotates, the fuel pump turns on again, this indicates that the crankshaft position sensor, if faulty, is at least receiving some impulses. The injectors do not open. Just in case, I turned off the immobilizer, it is located here, I just pulled out the connector. Accordingly, the diagnostics, of course, will not work now, but you never know... And, since it is not clear what is the reason for the lack of a spark and injectors*, suspicion fell on a glitchy immobilizer. And now we are flashing the block. I downloaded the firmware, removed the immobilizer from the firmware and uploaded it back.

My homemade adapter is used. Let's connect to the brains...* The loader used is this one - CombiLoader, this version is like this. I downloaded the firmware for myself, I’ll read why this firmware is cool. Maybe people saw it that way according to the version, I don’t know. Usually, when I repair a car, I use standard water and there are no more problems. And then all sorts of Sports, Economy and others - you won’t understand later that it* works so poorly. I'll show you the results.

I deceived you, unfortunately, I won’t show you how the problem was solved. And the problem was quite interesting. It seems that, based on the first signs, the crankshaft sensor was alive, one might say “conditionally alive”, because when the crankshaft rotated, the fuel pump turned on again and I, as it were, temporarily got rid of this problem. But, as it turned out later, the car had recently been repaired, the head was removed, and inexperienced mechanics laid a wire leading to the crankshaft position sensor near the exhaust manifold.

More about repairs: replacing the VAZ 2114 clutch

The wire melted and one of the wires shorted to the braid. For those who don’t know, there is a shielded cable in which two wires are laid. Surprisingly, the brain recognized the pulse in this position and turned on the actuator, that is, the fuel pump relay was turned on, but, accordingly, the engine control unit* was unable to calculate the position of the top dead center, or calculate the position of the pulses. I noticed it purely by chance (I was already freezing, I had no time for filming), just moving the wire near the crankshaft position sensor.

I took it off, checked the sensor - the sensor seemed to start* correctly. Pulling the wire, rotating the starter, the engine began to seize. At this point it became clear that the problem was with the wiring, and after looking carefully at the wire, I saw that it was burnt out. I cut out the damaged area, connected it - and the car started up perfectly and drove away*. It was already dark, I wanted to go home, so there was no time for filming. Nevertheless, I am reporting on the results and a little bit (about) my technique, which I talked about a little earlier in the video, about how to find a spark - the sensor can turn on the pump and at the same time not give a spark - a very interesting case came across. I think you'll take note.

How to solve a problem?

There are two ways to solve this problem:

On the spot. If you don't have time to remove the spark plugs, you can try drying them directly in the engine. To do this, open the throttle valve 50 percent before starting. Fortunately, on the VAZ-2115 the accelerator pedal is mechanical, with a cable drive. This will allow more air to enter the combustion chamber. The candles are “blown out” automatically. After starting, the throttle valve can be closed. But this method is not always effective. And then the second method comes to the rescue.
Self-drying. In this case, all four spark plugs are unscrewed. An important point - when removing armor wires, number each of them. Otherwise, the engine will not start at all, since the valve timing will be disrupted. You can quickly dry it with a home hairdryer, setting it to maximum blowing mode. If time permits, you can check the gaps between the electrodes of the spark plugs. When this parameter does not match the factory setting, the spark plug cannot produce a normal spark. We talk about this in more detail.

About spark plug gap

Over time, the gap between the electrodes increases. The normal parameter is from 0.7 mm to one millimeter. You can check this gap using a special feeler gauge.

The same is used for setting valve clearances on carburetor engines. So, if a parameter does not meet the norm, it should be adjusted. To do this, you should use a negative screwdriver. To reduce the gap, press the end of the plug onto the top electrode of the spark plug. With your other hand, hold the part itself. If you “overdid it”, it doesn’t matter – everything can be returned back. To do this, bend the electrode with the edge of a screwdriver (it bends quite easily) and check the distance again. It is worth noting that with a correctly set gap, you can not only ensure trouble-free engine starting, but also reduce fuel consumption by 5 percent. Also the car will run smoothly. After all, the mixture is ignited exactly at the moment when it is necessary. And the last thing is the resource of the candles themselves. If the gap is higher or lower than normal, the risk of breaking through the insulator increases significantly. As for the replacement schedule, it is about 40 thousand kilometers. It is recommended to replace the high-voltage wires along with the spark plugs.

Distributor

When looking for problems with the distributor, you need to take a close look at the inside of the cap. If there is damage, it should be replaced. If there are no problem areas, wash with gasoline. You can check the central contact of the distributor by moving it slightly to the side.

The integrity of the rotor insulation is easily checked by placing the central high-voltage wire at a distance of 5 mm from the rotor electrode and closing the breaker contacts with the ignition on. Sparks appearing in the gap mean that the rotor is not working and needs to be replaced.

Coil

Modern cars are no longer equipped with distributors. There is an ignition module here. VAZ-2115 (16 valves) is no exception. Sometimes breakdowns happen. Because of this, the VAZ-2115 does not start. The reasons are a faulty ignition distributor.

This item cannot be repaired. And in order not to waste time on diagnostics (or if you don’t have a multimeter), it’s worth installing a known-good ignition module. The VAZ-2115 should start without difficulty. Sometimes the high-voltage wires themselves pierce. But in this case the car starts and starts. This can be heard by the characteristic sound of the engine.

Bringing the car back to life

As for why a spark disappears, everything is probably very clear. Now, it would not be amiss to consider the order of her return. The reality is that in most cases, getting the spark back is a simple matter and just involves carefully checking the broken car. To be more precise, to normalize sparking it is required:

Firstly, check the spark on the injector using the method described above, make sure that it has disappeared, and, at least indirectly, try to determine the cause of the malfunction;
Next, it is enough to assess the current circumstances and act based on them. As typical situations, we suggest considering solutions to the following problems:
the spark plug is wet (not always) and the carbon deposits are incorrect (white or black) - clean, dry the part and try to start the engine, if there is no result, change the spark plug and deal with problems in the fuel system (cleaning the injector, checking the ECU, etc.);
the spark plug is wet, there is no spark at all, the color of the soot is not important - we try to change the part, if there is no result, we check the ignition system and the operation of the injector.

In principle, in theory there are no particular difficulties in repairs of this kind. Despite this, it often causes difficulties in implementation for inexperienced motorists. To solve these, you need to act in the order described above, but if something doesn’t work out, it’s better to turn to professionals at a service station. This approach to repairs will not only save time, but also guarantee trouble-free operation of the car in the future.

Perhaps this concludes the most important information on today’s issue. We hope that the material presented was useful to you and provided answers to your questions. Good luck in operating and maintaining your car!

Malfunctions in the ignition system of the VAZ-2115 are always upsetting, because any of them leads to frequent malfunctions of the car’s engine. The main sign by which one can suspect a malfunction in the ignition system is weak caviar or its complete absence.

Relays and fuses VAZ-2115

It happens that the car does not start due to a banal failure of the fuses. In this case, the pump will not emit a characteristic hum when the ignition is turned on. The sound should come from under the rear seats. On VAZ-2115 cars the pump is submersible and is located directly in the fuel tank. If there is no hum in the first 3-5 seconds after turning on the ignition, it means that power is not supplied to the element.

We start looking for a break in the fuses. The cover indicates which one is responsible for the electric fuel pump. But not only fuses are checked. The VAZ-2115 is also equipped with a relay. This element should make characteristic clicks when the ignition is turned on. If the VAZ-2115 does not start and clicks are not heard, most likely the pump relay needs to be replaced. Sometimes cleaning contacts helps. For this purpose, special sprays in cans are used. For the future, it is worth purchasing a set of spare relays and fuses. Sometimes such a “childish” breakdown happens on the road. With new parts in stock, you can continue moving without hindrance.

High voltage wires

Next you need to visually check the high voltage wiring. There should be no visible damage or disruption of the insulating layer. If the wiring is in good condition, you should check the wiring to the spark plugs.

To do this, you need to remove the tip from the spark plug wire, bring it to a place on the body without paint and start the car. When the starter rotates, a bright spark with a bluish tint should appear. If this does not happen, you should check the ignition coil.

At the same time, the spark plugs do not fail. If there is a spark in the spark plug wiring, it is possible to check any of the glow plugs. To do this, you need to unscrew the suspicious spark plug from the block and put the spark plug wire on it. Next, you should touch the place on the body without paint with a metal part and, by rotating the starter, determine whether there is a spark or not.

Replacement of spark plugs must occur in a timely manner, in accordance with the maintenance of your car model. For VAZ-2115 - approximately every 20 thousand kilometers.

Ignition problems

Most often, the reason lies precisely in one component of the ignition system. Weaknesses that are the first to come under suspicion are:

egnition lock;
induction coils;
starter and ignition relay;
lack of voltage at the battery terminals.

Most often, the problem lies in a banal lack of voltage at the ignition switch contacts. It is supplied directly from the battery to the starter.

If, after turning the key, the dashboard goes out or does not light up at all, it may be a problem with the cylinder.

Checking the functionality of the ignition switch is relatively simple:

it is necessary to dismantle the larva;
Using a multimeter, the contacts are called in different positions.

If there is no contact, then you should simply purchase a new lock. It simply doesn't make sense to repair it.

You need to pay attention to the behavior of the car immediately after turning the key. If there is no characteristic clicking sound from the side of the door from under the panel, the relay has probably failed. It is located above the clutch pedal.

Like the ignition switch, it simply does not make sense to repair such a relay. You need to purchase a new one and install it in place. You also need to check the ignition coils. Often the spark on the spark plugs disappears due to their failure. The test must be carried out by removing the coil and connecting it to the tester. You should ring the windings - a break in one may be the cause of the malfunction.

If you have problems starting the engine in cold weather, you should make sure that the battery is working properly. Often it simply fails.

It is not difficult to check the condition of the battery using a conventional tester - you need to switch it to the constant voltage measurement mode and set it to the 20 V limit.

The voltage between the terminals should be 12.6 V. It would also be a good idea to measure the density of the electrolyte using a hydrometer.

What to do if there is no spark VAZ-2109 carburetor reasons

The reasons why the spark disappears on a VAZ-2109 carburetor type car may be the following:

faulty Hall sensor;
the switch burned out;
break in the ignition coil;
high-voltage wires are worn out;
the candles became unusable;
The timing belt is worn.

From the very beginning, if the disappearance of the spark is detected, you should review all contacts and the condition of the electrical wiring. If you find oxidation on the connector, it must be cleaned with sandpaper and rechecked for the presence of a spark. High-voltage wires should be checked for integrity using a special device - a tester.

A breakdown in the ignition switch can be diagnosed using a standard automotive lamp. One of its contacts must be connected to the body body or carburetor engine 2109, and the second contact must be connected to wire “B+” from the ignition coil. If the light is on, this indicates that the ignition switch is working properly. In this case, you need to go to the ignition coil.

The serviceability of the Hall sensor can be checked using a voltmeter or, again, a light bulb. At the moment the distributor rotates, the filament in the light bulb should change the intensity of the glow.

The simplest way to check for proper ignition of carburetor VAZ-2109

If there is no spark in the car, you can find the reasons in another way. This technique does not require the use of a special device or tool. In this method, the entire ignition chain is tested, without taking into account the Hall sensor. To carry out this work, we need a small wire with insulated ends and a nail or paper clip.

First of all, we disconnect the high-voltage cable from the distributor. During checking, it must be positioned approximately 10 millimeters from the minus of the car. Next, turn on the ignition. Disconnect the connector from the Hall sensor and connect its end to the middle contact, to which the green wire is connected. We short the other end of our wire several times to ground. At the moment of short circuit, sparks should run between the ground and the end of the wire. If there is a spark in a carburetor VAZ-2109, we can conclude that the Hall sensor is faulty or there is no contact. Often, inside the distributor itself, the plate frays the wires or the connector simply becomes loose. In addition, there are cases when, when checking, we see the presence of a spark, but when connecting the wire to the spark plug caps, there is no spark. This indicates the need to replace the slider inside the distributor. Some carburetor-type VAZ-2109 are equipped with an ignition interlock circuit, which may also become unusable (or there is a malfunction in the switch).

Before performing the test, you need to prepare the following set of tools:

figured and flat screwdrivers;
insulated pliers;
control with a wire or tester;
spare spark plug.

To protect yourself from electric shock, you should wear dielectric gloves.

Verification process:

We turn off the ignition, after which we check the high-voltage wires for breaks, and at the same time check for good contact in the connections with the distributor and the ignition coil.
We carefully inspect the condition of the wires between the distributor and the switch, and also check the wires from the ignition coil to the switch.
With the ignition switch on on a carburetor VAZ-2109, you need to check the presence of power in the system. To do this, take a test lamp, connect one end to ground, and the other to the “B+” contact of the coil. The glow of the control lamp indicates the presence of power.
Using a rubber glove, disconnect the middle high-voltage wire from the distributor. We put a spark plug into its tip and touch the engine ground with the metal part. When cranking the starter, sparks should flow from the spark plug.
Unscrew the screws of the distributor and remove its cover. We check for cracks and damage, and also check the condition of the coal. If the cover is damaged or cracked, it must be replaced.
We inspect the condition of the slider in the distributor. Quite often it happens when there is no spark due to a breakdown of the interference suppression relay or breakdowns in the housing of the ground slider.
We check the crankshaft by rotating the starter. If the slider is stationary, the reason for this is a broken timing belt or the drive itself is faulty.
We check again for the presence of a spark.
If once again there is no spark in a VAZ-2109 carburetor type car, you should check the high-voltage ignition wiring, as well as the spark plugs themselves. To do this, you must use a known good spark plug. If there is still no spark, change the high-voltage wire.

Fuel supply: fuel pump failure and other reasons

If all of the above problems are absent, then you should check the performance of the fuel system. Often the reason lies in the following:

the fuel pump has failed;
low pressure level in the fuel line;
the filter is clogged;
the injectors are out of order;
low pressure in the ramp.

You need to remember: it is quite difficult to check the performance of the fuel pump on cars with an injection engine. You can determine its performance by its sound - immediately after turning on the ignition, it should definitely make noise. If the fuel pump is faulty, it will need to be replaced. Such devices do not require repair.

You should check the pressure level in the fuel line and rail. To do this you will need to use a special pressure gauge. The normal pressure level for VAZ 2115 and VAZ 2114 is from 2 to 2.5 atm.

If this indicator is lower than specified, then the car will have poor grip and stall while driving. In this case, it will be difficult to fix the problem yourself. It is worth contacting a car service. It often leaks at the ramp connection point.

Starter failure

If all other system components are in order, then the reason for the inability to start may lie in the absence of a starter. Typical problems:

poor contact at the terminals;
the starter shaft bearing has failed;
The solenoid relay has stopped working.

It should be noted: the location of the power terminals on the starter suggests the presence of moisture. Therefore, often the contact simply oxidizes, which leads to problems in the operation of the device. That is why you need to carefully examine the contacts. Then clean them and check the voltage. If it is missing, there may be a break in the wiring.

When there is voltage, but the starter does not turn, it is often a problem with the bearings. To replace it, you will need a clean garage, as well as a special puller. This is the only way to dismantle it.

A little more often than a bearing, the solenoid relay fails. Sometimes it just jams - just tap it lightly with the key.

It is very simple to check the functionality of the retractor - just place the starter on the engine block and then touch the contact of the wiring relay connected to the positive terminal. If the starter starts spinning, it means the solenoid relay is in working condition. All of the problems listed above are typical and do not require any major repairs.

Low voltage circuit

Using a 12V lamp, you can check the low voltage circuit. The lamp must be connected with the first contact to the low voltage terminal, and the second to the car body. Next, you need to close the distributor contacts and start the ignition. If the circuit is OK, the lamp will light when the contacts open and go out when the contacts close.

If the lamp does not light up when the contacts are opened, this means that the problem is in the low voltage wiring or in the ignition coil, or rather, in its winding.

Other reasons for the inability to start the engine

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.

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.

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