The most offensive trouble for a motorist is when his car fails and does not want to start. The reasons for this may be a wagon and a small cart, now let's consider the case when the car does not start, but the starter turns.
Directions for troubleshooting "the starter turns, but the car does not start."
- carburetor;
- air filter;
- fine filter;
- spark;
- crankshaft sensor;
- timing marks;
- starter.
So, let's consider them in order, starting with the fuel pump. If, the starter turns, but you can not hear the operation of the fuel pump motor - the problem is in it. The sound of his work should be heard in the cabin. Otherwise - burnt fuel pump motor or its fuse, which should be checked.
It is possible that the car does not start although the starter turns to blame bad mix. More precisely, the carburetor, which this mixture has prepared. In this case, it needs to be cleaned, set the jets for injection so that they hit exactly in the center.
It doesn’t hurt to take a look at the air filter - fortunately, it’s not difficult, but it can answer the question “why the car doesn’t start when the starter is running.” At the same time, it is worth checking the wiring of the injectors.
The fine filter can also be the reason that the car will not start. He is quite could clog and no longer passes enough fuel, especially if it has not been filmed for a long time and took a sip of "left" fuel from a suspicious gas station.
If everything above is in order, you should pay attention to the ignition system. That is, check the BB wires, make sure the spark plug has a spark, see the distributor.
Take a look at the crankshaft position sensor. Due to poor contact in the connector, more than one domestic-made car refused to start, although the starter was spinning.
Perhaps the battery is simply discharged or the terminals are oxidized on it. Maybe the battery has enough charge to turn the starter, but it's not enough for the engine. Worth checking the voltage.
It also happens that starter turns bad, i.e. . Then the disassembly of the starter shines, lubrication, replacement of the retractor and, possibly, the bendix itself.
Such are the main reasons that the car does not start, but the starter turns.
Owners of a VAZ 2110 car very often encounter a problem - the starter is spinning, but the car will not start. In today's article, I would like to tell you about all the causes of this malfunction, what to pay attention to in the first place and fix this breakdown on my own.
In general, there are a lot of reasons why the engine may not start and it is impossible to consider them all in one article. However, there are "basic" conditions that are necessary for a successful launch. We will now discuss them.
Why does the starter turn but the car won't start?
A successful start requires a supply of fuel at working pressure, air and a well-timed spark. It is also extremely important to prepare the correct fuel air mixture. These conditions should be checked first when the engine refuses to start.
Burnt contact of the solenoid starter relay VAZ 2110
Difficulties with starting or its impossibility can arise for a variety of reasons. The culprits should be looked for in such devices:
- Faults fuel system for all types of motors;
- Problems in the electrical equipment of the machine.
It should be taken into account the fact that starting the engine in cold weather is significantly different from carrying out this operation at positive temperatures. We will not touch on problems with the battery and starter, we will assume that everything is in order with them, so we will focus only on problems power unit.
Why the VAZ 2110 won't start - 3 main reasons
Battery problems
First of all, if the VAZ 2110 does not start, but the starter turns, it is worth checking the operation of the battery. The voltage at the terminals of a fully charged battery will correspond to a value of 12.6 V. When fully discharged, it drops to a level of 10.5 V. But even a high idle battery voltage value does not guarantee its stable operation, which will be discussed in more detail a little below.
It should be understood that lead-acid batteries cannot be fully discharged. In addition, their capacity can be significantly reduced by the number of work cycles and the total service life. Thus, a battery with a high voltage level idle move, with the electrical receivers disconnected, may not be able to provide the necessary power to operate the starter. How to check it?
You can determine the fact that the battery has no reserve of the required capacity (Amp hours) using the same multimeter that reads the voltage level at the battery terminals at the time the engine is started. If the voltage drops below 10.5 V, then the battery is completely discharged or is out of order and is not able to start the VAZ-2110 starter.
Among the main causes of battery self-discharge are the following:
- the generator is out of order or the voltage regulator does not work;
- the ignition key left on for a long time;
- improper use of the battery, failure due to physical wear and tear and exhaustion of its working resource;
- wiring faults.
In order to prevent battery and alternator problems, dashboard VAZ there is a special indication. She reports about possible problems with a generator, a broken belt drive from the drive shaft to the generator, or a battery malfunction. If you do not want to prematurely buy a new battery, problems with the generator should be solved in the next 50-100 km. mileage after the corresponding indication appears on the dashboard.
Checking spark plugs and sparks
If the engine does not start within five seconds, it is useless to turn the starter. You can try to start again, but it is unlikely to give any sense. Moreover, excessively long operation of the starter can lead to overheating and even fire.
If you try to start a carburetor engine for a long time, then gasoline will flood the candles and make further attempts to start impossible in principle. The injectors have a purge mode, so the candles can be dried without removing them from the car - you just need to press the gas pedal to the floor and turn the starter.
But these are half measures. First of all, you should unscrew at least one candle, put the wire on it again and place the candle on the engine so that there is a distance of about three millimeters between the metal part of the candle and the metal of the engine. Turn on the starter and make sure that an even spark jumps between the candle contacts.
Do this check for each candle. If there is no spark on any candle, then there are global problems in the ignition system.
Checking the fuel pump and fuel supply
The principle of fuel supply in carburetor and injection models of engines is different, but intermittent malfunctions are in many ways similar. Fuel supply in both systems is carried out by a gasoline pump. In the carburetor model, it has a mechanical drive; in injection models, it is an electric pump that creates high pressure in the fuel rail. Both types of pumps have built-in fuel filters, clogging of which leads to failures when trying to start the engine.
You can indirectly determine the supply of gasoline to the cylinders by appearance candles. If the candle unscrewed from the cylinder is wet and smells of gasoline, then everything is in order with the fuel supply. However, it is better to verify this more reliably.
An electrically driven gasoline pump may not work due to the lack of supply voltage at its terminals. The culprit in this situation may be a blown fuse or a broken wire. Problems can arise due to the fault of the carburetor, clogged jets will not allow the engine to be started. But most of the problems in the fuel system are inherent in the injectors. In such systems, there are several sensors that monitor and regulate the operation of the power unit. Failure of the DPKV will make it impossible to start the motor. Similar problems may occur due to the fault of the pressure regulator in the fuel system. It is impossible to exclude from the organizers of a poor start of the engine injector.
On the injection engines to do this, relieve pressure in the fuel system using a special valve at the end of the fuel rail. Unscrew the cap and press the valve with a screwdriver. Fuel should squirt out from under the valve. Then release the valve and turn on the ignition. At this time, it is obliged to start the fuel pump, restoring the discharged pressure in the system. If the pump is silent, turn on the starter. When and with the starter turned on, the pump does not work, most likely there is a malfunction in its power supply system.
If the pump has started working, then once again we check the pressure in the fuel system, dropping it through the same valve in the rail. Again splashing gasoline indicates that everything is in order with the fuel supply system. When gasoline does not splash and does not appear from under the valve at all, we can talk about faulty regulator fuel pressure in the rail (constantly bleeds gasoline through the return line into the tank) or some kind of plug in the main fuel line (for example, due to freezing of water in low-quality fuel).
On carburetor engines, it is much easier to check the flow of fuel. Simply remove the cover air filter, move the lever throttle valve the first chamber of the carburetor, simulating pressing the gas pedal and see if gasoline splashes from the spray nozzle. You can pump gasoline into the carburetor with a manual pumping lever, which is on all mechanical gasoline pumps.
Broken timing belt
VAZ 2110 does not start the starter turns - is the reason lies in the broken timing belt?
The gas distribution mechanism of the engine is driven by a gear crankshaft. Initially, chains were used for this purpose, and timing belts, which began to be massively used about twenty years ago, caused distrust among car owners.
The undoubted advantages of a belt drive over a chain drive are its simple design, low weight and low noise. However, it is not without its shortcomings, the main of which is the relatively small resource of the timing belt.
Of course, a faulty, torn or timing belt that has come off the guide also causes the VAZ 2110 not to start. By the way, on stock non-deformed 21120 engine models, a torn timing belt also causes valve deformation and requires additional repair. In this case, driving even after replacing the belt without restoring the valves is impossible.
Check the presence of a spark in the candles visually by turning on the ignition and pressing the outer metal part of the candle to the metal unpainted body of the car or to structural elements. Do not forget that all electrical parts of the product are under high voltage, so it is better to work with insulating gloves. If there is no spark on only one candle, be sure to check the rest, drawing the appropriate conclusions.
The consequences of a broken timing belt entirely depend on the design of the power unit. To imagine what will happen at this moment, you need to turn to the mechanics of the internal combustion engine.
In a running engine, the pistons move continuously from one dead center to another. During the intake stroke, the piston moves down and the intake valve opens; during the exhaust stroke, the exhaust valve opens and the piston moves up. At that moment, when the piston is at top dead center, all valves should be closed. If the timing belt breaks, the camshaft stops rotating and the valves stop in one position. At the same time, the crankshaft continues to rotate by inertia, and the pistons rush towards the open valves.
In some engines, for example, the 8-valve VAZ-2111, the pistons have special grooves to avoid contact with the valves in the event of a break. In this case, there will be no consequences, except that the car will not be able to get to the garage or workshop on its own.
How to check the fuel - air system VAZ 2110
Another reason why the VAZ 2110 does not start may be a faulty fuel-air mixture supply to the car engine. In the air supply system, malfunctions are extremely rare and come down to either a tightly clogged air filter or blocking the air duct with a foreign object. Such failures are unlikely to occur in a well-maintained private car. But if the car, for example, is service or recently purchased, it will not be superfluous to make sure that the filter is intact and that a rag has not been stuck in the channel after a recent repair.
The fuel supply system to the engine is controlled by an electronic control unit, which, in turn, regulates the ratio of fuel and air according to the readings of the mass air flow sensor (MAF) and the throttle position sensor. If both of them are faulty, it is not surprising that the VAZ 2110 does not start.
Next, it is worth checking the condition of the air filter, since this is the easiest to do. And, if none of the above actions helped, it is necessary to check the pressure in the system created during the operation of the fuel pump. Connect a pressure gauge to the diagnostic socket of the fuel rail and measure the pressure. Its low level indicates a clogged pump filter, and a high level indicates a gearbox malfunction.
The normal pressure level directly depends on the type of engine installed in the VAZ 2110 car:
- a limit of 284 to 325 kPa is normal for type 2111, 2112 motors;
- a limit of 364 to 400 kPa is normal for motor types 21114, 21124.
By the way, the health of the fuel pump can also be determined by turning off the main hose for supplying gasoline to the ramp and pumping gasoline through it into a clean container. A serviceable pump will pump at least 1.5 liters per minute. fuel.
Also listen to the starter. Does the main electromagnetic relay turn on with a characteristic click and does the electromechanical drive of the unit work at all. Despite the fact that the design of the starter is extremely simple, it can easily lose electrical contact or fail the gearbox. In the latter case, a characteristic creaking or whistling sound will be heard.
If the starter does not rotate, you should dismantle it from under the hood of the car. This process will not take much time, as, in fact, the disassembly of the block itself. It is worth checking the health of the electrical part with a multimeter, “ringing” the windings, and disassembling the gearbox. A large amount of lubricant in it during the cold season does not allow the starter to rotate.
Checking electrical equipment VAZ 2110
If there is something to burn in the working cylinders, then you need to look for what will make the mixture burn. This means that you need to pay attention to the car's ignition system. It can be an ignition distributor, a high-voltage coil and wires, candles.
It does not happen that all devices fail at the same time, so we should talk about them separately. We will assume that the distributor is installed correctly, in which case a failure may occur through a breakdown of the cover or slider, failure of the Hall sensor.
However, most often the cause is in poor contact in the power connector of the ignition distributor. Problems can be created by an ignition module or coils that do not produce high voltage for sparking candles. The injectors work in conjunction with the ignition modules, which are usually two per engine. One provides work for 1 and 4 cylinders, and the second for 2 and 3 cylinders.
These systems can be problematic. the electronic unit control, which generates control pulses for all systems, including ignition. You can check this block only by replacing it. The same can be done with ignition modules.
Sometimes the fault may come from the high voltage coil, it does not produce voltage that can create a spark to ignite the air-fuel mixture. You can check its operation if you unscrew the candle from the cylinder and, together with high voltage wire make sure it is in contact with the engine ground. At this time, you need to scroll the starter and watch the candle. The absence of a spark confirms a malfunction of the ignition coil. It is impossible not to dwell on such elements of ignition systems as candles.
They are the ones that ignite combustible mixture in the working cylinders of the engine. In the process of their work, the metal parts of their electrodes burn out, after which the gap increases, starting the motor is complicated, if not impossible. Check the condition of the candles regularly, especially their gap, then problems can be avoided. You can still continue the review of situations when the starter turns, but the VAZ 2110, 2112, 2114 does not start.
It is simply impossible to take into account absolutely all cases, but in order to avoid such situations, do it in a timely manner maintenance work maintenance of the machine, use only high-quality operating fluids.
Among the mass of surprises that his car can present to a motorist is a refusal to start the engine. There are many reasons for this misunderstanding. One of them is a starter failure.
Also, when the car does not start, the starter does not turn, the reason may lie in some auxiliary systems. The fault may be the battery, problems in the electrical circuits, or a malfunction of the solenoid relay.
Car engine start mechanism
The engine start mechanism of a car is a system that requires special attention and is directly responsible for starting the engine itself.
Modern cars are mainly equipped with a starter engine start system. The trigger mechanism is directly related to electrical equipment.
The mechanism is powered by direct current from the car battery. The launch mechanism includes the following elements.
- Connecting wires.
- Ignition lock (read also about).
- Drive mechanism.
- Traction relay.
Causes of starter failure
The rotation of the crankshaft of the engine occurs due to the creation of the necessary torque of the starter. It's kind of Electrical engine with direct current.
If it turns out that the starter does not turn, it is necessary to determine the cause of the breakdown and understand what exactly the malfunctions in the engine start system are characterized by.
Sometimes the starter does not turn or click due to disabled peripherals. In this case, you also do not need to discharge the battery, and start looking for a problem.
Lack of sufficient charge in the battery
When considering the reason when the starter does not respond to turning the ignition key, most often motorists focus on the lack of power. The battery is either disconnected or dead. If this is indeed the reason, do not wait for signs of life from the starter.
If the problem with the battery is confirmed, the terminals on the battery should be carefully checked. Often the lack of power is due to a weak connection.
Ignition Circuit Malfunction
If the starter does not turn, but the battery check did not show any malfunctions, you should look for the causes elsewhere. Often breaks in the wiring are to blame for the problem, that is, the electrical wires either spark when the engine is started, or they are completely disconnected from the battery.
Often the same problem occurs due to oxidized terminals. This "disease" is typical for batteries of any models.
Solenoid relay failure
In some cases, the starter solenoid relay clicks, but the circuit does not close. Sometimes you can save yourself by closing contacts, but not always. If a characteristic crack is heard in the engine area, the bendix is likely to break.
Knowing the bendix is easy. It looks like a small gear located on the rotor shaft. When voltage is applied to the bendix, a relay starts to operate, which controls its movement, engaging with the flywheel.
If the bendix is worn out, the entire procedure described becomes impossible, since the relationship between the part and the flywheel teeth will not be achieved. The impossibility of this procedure provides a characteristic crunch.
Starter malfunction
Although most often the reason for the fact that the starter does not turn is a lack of energy and a lack of charge in the battery, often the reason lies in the very details of starting the engine.
In this scenario, identifying and fixing the problem will take much more time and effort. Common launcher problems include:
- if there is a smell of burning, or the starter is smoking, it is possible that the winding burned out during the circuit;
- breakdown of the electrical system of the launcher;
- failure of the solenoid relay;
- worn bendix teeth;
- contacts are damaged;
- burned wires.
Usually, when the starter clicks, but does not turn, it is sent for repair to the service, but its repair is not always possible. For example, if the cause of the malfunction is a breakdown of the retractor relay or a malfunction in the operation of the bendix, repair of the device is possible. If there is a problem with the electrical system, the starter will most likely have to be replaced.
Incorrect alarm operation
How to start the car if the starter does not turn, if everything is in order, the battery is charged, and the wiring is not damaged? There is a possibility of malfunctions in the process of work as a result of malfunctions of car alarms and immobilizers.
The characterizing factor of the presence of a problem in the anti-theft device is that the car does not start, the starter does not turn, the relay does not click. Or the car starts, but immediately stalls. The engine does not respond to starting from the key, and does not start with the key fob. If all these factors, or selectively, are present, then either a complete or partial blocking of the system has occurred.
What can be done?
Any motorist knows about the generator in the car for charging battery. This is special device, which transmits electricity to the battery and on-board system from the motor.
Thanks to this technological process, you can additionally charge the battery. Fully charging the battery in this way is impossible for a number of nuances:
- The battery cannot be fully charged during operation as it must be at rest.
- This technology allows you to charge only to start the engine.
- The charging process itself is very weak.
- If the generator is running, the battery is under heavy load.
Therefore, when the car does not start, the starter does not turn, the relay clicks, you should not count on charging the battery in this way.
It is much more efficient to recharge the battery in the standard way, using charger. All energy will be restored in just a few hours, and the battery will be ready for use again.
If the situation is urgent, charging through the charger is still more relevant. Literally 20 - 30 minutes, and the battery will be partially charged.
In case of problems with the power supply system, it is necessary to take some actions:
- using a screwdriver with a rubberized handle, unscrew the battery terminals;
- take sandpaper of zero fraction, and carefully clean the connecting wires and terminals;
- also clean the contacts on the battery itself with sandpaper;
- check the battery charge;
- evaluate visually the connecting wiring supplying the starter for integrity;
- securely fasten the battery terminals, making sure that they do not disconnect;
After all these manipulations, you should turn on the engine and evaluate the operation of the starting system.
If the starter does not turn, the relay clicks and crackles, it is necessary to check the solenoid relay. To do this, directly from the battery voltage should be applied to the control terminal. It's not hard to recognize her. Usually a thin wire leads to it. In the case of normal engine cranking, the failure of the retractor relay will be confirmed.
Most often, the contacts are burned in the relay. To eliminate the malfunction, it must be dismantled, the contacts cleaned and installed back.
A repaired solenoid relay, by definition, will not last long. The fact is that factory processing involves applying an erosion-resistant layer to the contact nickels.
Under normal conditions, the application of this layer is not possible, so the next burning of the contacts is possible at any time.
Conclusion
There are many reasons why the car does not start, the starter does not turn, clicks, and so on. Moreover, all these reasons often have nothing to do with each other. The reason why do not turn the starter can be caused by both the usual aging of the metal, and many other factors, up to improper operation.
Experienced drivers know that, along with the convenience of moving, a car can also bring various breakdowns and malfunctions to its owner. Visiting auto repair shops is one of the essential components of any car owner. As for the nature of the breakdowns, everything can be individual here: from the banal replacement of candles to serious problems with the engine. However, there are malfunctions that almost every car owner has to deal with. The car does not start, the starter turns - one of them. Today we will consider this problem in detail, find out under what circumstances it can arise, and also tell you possible ways to resolve the issue.
Possible causes of malfunction
To deal with any problem, you first need to find the cause of its occurrence. Otherwise, all further manipulations simply will not make sense. For the "treatment" to be effective, the source of the "disease" must be determined with surgical precision. With machines, as in the case of people, self-medication is fraught with certain consequences. Acting at random, you not only cannot help, but you also risk causing even more harm. Experts point out that starter failures can turn into troubles on the road, so they strongly recommend not to postpone the issue of repair indefinitely and find out why the starter turns idle.
So, the reasons that the car does not start right away can be:
- problems with fuses;
- battery rust;
- the battery needs to be charged;
- no spark at the ignition coil;
- formation of condensate on the inner surface of the hood;
- fuel system problems.
According to the observations of experts, in new foreign-made cars, starting up after turning off the car is prevented by pollution or low levels of lubrication. In such cases, you can cope with the problem on your own, without professional help. The starter should be removed, disassembled, carefully cleaned of dirt and foreign debris, replenish the amount of lubricants.
Car won't start, starter won't turn
There are two types of starter problems: when you try to start the car, the starter turns or does not turn. This seemingly insignificant detail actually points to the source of the problem. If, when you try to start the car engine, the starter clicks, but does not want to rotate, then most likely the problem lies in the malfunction of the relay. Diagnosing and repairing a relay is not such a complicated process, so if you want to save a little money, you can do it yourself:
- disconnect the battery power;
- disassemble the relay, cleaning it from dirt;
- unscrew the bolts and remove the contact;
- unscrew the screws that are responsible for attaching the relay;
- divide the relay into two parts and remove the core;
- install a new analogue;
- reassemble in reverse order.
Starter spins, car won't start
Situations when the starter turns and the car does not want to start in any way are quite common. In this case, the first thing to pay attention to is the state of operation of the fuel supply system and the ignition system. We immediately want to draw attention to the fact that such a check can only be carried out if the starter is running smoothly, without characteristic clicks. Such clicks will indicate that the source of the problem lies in the starter itself, which means that it needs to be replaced.
If you hear a familiar buzz, but the car does not start, then you can start checking the listed systems.
Fuel system check:
- In the case of an injector, turning on the ignition should be accompanied by a characteristic buzzing of an electric fuel pump. If not, then check the fuel pump.
- In the case of a carburetor, things are a little different. Remove the end of the hose from the carburetor inlet fitting and pump the primer lever several times. Ideally, gasoline should flow from there.
- Also pay attention to the condition of the fuel filter. It may need to be cleaned or replaced.
- The reason that the starter works, but the car does not start, may be a clogged throttle.
Checking the ignition system is as follows:
- Remove the spark plug and check if it sparks.
- The absence of a spark in an injection car indicates a problem with the ignition module.
- No spark in carbureted engine indicates a problem with the ignition coil.
Car owners often complain that the starter turns but does not start, or the starter turns badly or does not turn at all, and it’s impossible to even find out which is worse. This situation is especially common in winter, when frost and cold dominate the street. And the most annoying thing is that even if you manage to get the car to move, it is unlikely that it will be possible to predict its further behavior. After all, it is quite possible that after the first stop, provoked, for example, by the need to refuel, the car will again refuse to drive at least a meter. In this case, the main thing is to remain as calm as possible, even cool-headed, in order to find out and fix the problem as soon as possible regarding why the starter does not turn.
Naturally, every driver, sitting behind the wheel again, expects that after the very first revolutions of the starter shaft, the engine will start its work smoothly, stably and cleanly. But sometimes the hopes of the car owner are not justified: the starter turns - the car does not start. That is, the starter does not turn the engine, which is its functional duty. Of course, this is not a second-rate problem, because if the starter turns badly or if it refuses to do it at all, then the car is unlikely to move at least a meter. Therefore, in the event of such a difficulty, the first thing to do is to check the status of the most basic automotive elements whose malfunctions could cause problems. It can be done on their own or entrust this difficult task to specialists. If the motorist is already confident in his knowledge and has decided to independently look for the reasons why the starter does not turn, then I advise you to first check the following auto devices:
- Candles - they are the subject of creating sparks that ignite a mixture of fuel-air type in the engine cylinders. Naturally, they must be in good condition, do not have accumulated soot on yourself, because this is the cause of unequal engine operation.
- Fuel filters are an equally important element in the car, designed to filter out particles of rust and dust, at the same time preventing them from entering the line of the entire fuel system of the engine. It is possible that they stopped filtering, which is why they failed, and this provoked the problem that the starter turns but does not start.
- The battery is perhaps the most common cause of malfunctions in everything, because as soon as the charge of this unit has dropped to zero, the car will stand still as if rooted to the spot. Therefore, checking the charge level and making sure that it is always in optimal condition is a must.
- Terminals - they are included in the list of components of the battery, but they should be singled out as a separate item, since these particles, despite their small size, play a significant role in the process of carrying out the overall operation of the car. I want to draw your attention to the fact that the driver must always be sure that the terminals on the battery are in good condition, that they have not oxidized, and then the problem of the starter turning but not seizing is unlikely to arise again, Or it doesn't spin at all.
- The throttle valve is another important element of the car, which is a mechanical regulator of the flow area of the channel, which is designed to regulate the level of the medium that flows in this channel. We are talking about a gas or any kind of liquid. It is recommended to keep this device clean so as not to face the problem of failure car engine work.
Possible reasons
The reasons why the starter turns - the car does not start can be very diverse. The same applies to the situation when the starter is able to turn, but does it slowly, weakly and hard. But in general, if the starter does not turn, the reasons for this may be as follows:
- Discharged battery. In principle, car owners often have to deal with this problem, and indeed hear that it is precisely because of the power supply that many problems arise with common work car. Or rather, not because of this device, but because of its discharged state. Therefore, I repeat my advice: make sure that the battery always has a normal charge level. Everything is elementary here - it just needs to be charged. In addition to this factor, a battery, like any other material object, is prone to damage, in particular, this applies to the terminals on its surface. So this is also recommended to check.
Condensation under the hood, which should not be, may appear due to the operation of the air conditioner. There is nothing catastrophic in this, but I will advise you to eliminate this problem as soon as possible, which over time can gain more significant and dangerous proportions. And then you will have to complain not only that the starter is slowly turning, but, perhaps, that it has completely stopped turning.
- Violation of the integrity of the fuses. You don’t need to understand cars with a solid “5+” in order to understand that in order to carry out normal functioning, all its parts must be intact, not have any damage. Otherwise, this may cause the problem that the starter turns poorly or does not turn at all.
- Corrosion on parts that enter the electrical circuit. Particular attention here should be paid to the main object of this story, because if this particular device is damaged, then, most likely, it is for this reason that the car cannot start.
- No spark supply. It may also happen that the starter turns constantly, but the car still does not budge. The problem may be the lack of spark supply. In the presence of this problem, I recommend urgently changing the ignition coil.
- Fuel equipment. It's pretty serious problem, which can explain why the starter does not turn. I do not recommend trying to fix everything on your own in this situation. It is better to seek qualified help from auto mechanics who will be able to ensure that the problem “hard turns the starter” or “the starter turns - the car does not start” will no longer sound in the thoughts of the car owner.
Now a little more about the given possible reasons that the starter turns but does not start. The most common problem is related to idling. Its essence is that the starter is able to turn, but the engine, nevertheless, does not start. And this is unlikely to happen, despite the fact that the process of trying can be very long. 
If the described device works quite stably, that is, it rotates the motor crankshaft without much effort, but it is still indifferent to these attempts, then possible reason failure lies in the fuel supply system or ignition.
Sometimes it happens that the starter turns badly, namely, it does it jerkily. From my own experience, I can say that this symptom is characteristic of insufficient contact contact. Recently, this has been a fairly common problem, because cases of installing poor-quality electrical wiring have become more frequent. Here is the explanation for the fact that the starter turns weakly.
The motor may not start even if the analyzed mechanism clicks. In this case, the fault may lie with broken contacts. This symptom, quite possibly, indicates a malfunction of the retractor relay, so car owners may not be surprised that the starter turns but does not catch.
And, of course, the worst thing is when, after turning the key in the ignition, absolutely nothing is heard. If the starter does not turn the engine at all, which can be understood by the absence of any kind of clicks and other sounds, then this is a good reason to urgently contact a specialist.
If the starter does not turn, the reasons may lie in the weather. It is clear that in the presence of sub-zero temperatures, the explanation why the starter does not turn is predictable. But if you figure it out, then everything is much more complicated, because there can be several reasons why the starter does not turn in the cold. 
So, if the starter turns badly or refuses to do it at all when the temperature is below zero, then this may be due to the fact that there is nothing to burn, or that there is nothing to set fire to. The first category includes problems associated with poor quality gasoline, dirty and clogged fuel filters and injectors, incorrect operation of the fuel pump or fuel pressure regulator. In this case, the object of this advisory material will hardly be able to perform its functional duties.
The second category of problems, when the starter does not turn in the cold, should include those described earlier (in particular, with regard to the battery and spark plugs), as well as those associated with malfunctions of the distributor cover or slider, armored wires, ignition coils, lack of compression in the cylinders . These are the main reasons given so that car owners have at least the most elementary idea of \u200b\u200bwhy the starter is hard to turn. In any case, I recommend checking your car as often as possible in order to prevent or at least minimize the number of problems with it.
Video “Starter buzzes, but does not turn the engine”
The entry describes the main reasons why the starter buzzes, but does not turn the engine.