Why won't the car start

Problems with starting the internal combustion engine probably happened to every motorist. Except, perhaps, for those who have little driving experience. Well, if God has been merciful to someone so far, they are still ahead. The situation when you get behind the wheel and cannot start the internal combustion engine occurs, according to the well-known “law”, at the most inopportune moment. Faced with this for the first time, the driver may well be confused. But even experienced motorists are not always able to quickly figure out what's the matter. So that such a nuisance does not take you by surprise, it is useful to know for what reasons the internal combustion engine may not start. It happens that you can deal with the problem on your own, but there are also difficult cases when you need the help of specialists.

Before climbing into the jungle, it is worth diagnosing simple and obvious things.

First, fuel. Perhaps it ended corny, but you did not pay attention. Although there are times when the sensor float is stuck, and the indicator shows that there is enough fuel, although in fact the tank is empty.

Secondly, anti-theft agents that block the start of the internal combustion engine. It happens that the driver starts to start the internal combustion engine, forgetting to turn them off.

Thirdly, the exhaust pipe. diagnose if it is clogged with snow, or maybe some joker put a banana in it.

These causes are quickly identified and easily resolved. But it's not always so lucky.

If the battery is dead, attempts to start the internal combustion engine will lead to nothing. To start the unit, a very significant current is required, which a dead battery is not able to provide. If you are trying to crank the engine with a starter and at the same time clicks are heard, and the brightness of the dashboard backlight decreases noticeably, then this is just such a case. It makes no sense to force the starter, you will not achieve anything good by this.

The first step in this situation is to diagnose the battery terminals, they often oxidize and do not pass current well. Try to disconnect the wires from the battery and clean the contact points on the wires and the battery. Next, put the wires back in place and make sure they are connected securely. It is quite possible that it will be possible to start further.

The battery can be discharged for several reasons:

• there is a current leakage, to check, try disconnecting electricity consumers;
• the car is used in the mode of short trips, during which the battery does not have time to fully charge, the problem is solved by periodically charging the network

; and requires a change;

• the alternator is defective, which cannot provide the required charging current, or its drive belt.

If you need to replace the generator in a Chinese brand car, you can pick it up.

A starter is an electric internal combustion engine, in which the winding can burn out or the brushes can be worn out. Naturally, it will not spin at all in this case.

But more often the bendix or the retractor relay fails. Bendix is ​​a mechanism with a gear that turns the flywheel of the internal combustion engine.

And the retractor relay serves to engage the Bendix gear with the teeth of the flywheel crown.

The relay may fail due to the burnout of the winding, and it happens that it simply jams. You can try to tap on it with a hammer, it may work, otherwise it will have to be replaced.

Often the problem with the starter lies in the power wires. Most often, the reason is poor contact at the connection points due to oxidation, less often the wiring itself rots.

The crown is put on the flywheel disk. It happens that its teeth may be broken or badly worn. Then there will be no normal engagement with the bendix, and the crankshaft will not turn. The crown can be replaced separately if you can remove it, or together with the flywheel.

In the Chinese online store, both kits and kits are available for sale.

If the timing belt breaks, the camshafts will not rotate, which means the valves will not open / close. No fuel-air mixture enters the cylinders, and there can be no talk of starting the internal combustion engine. The chain rarely breaks, but it happens that it can slip through a set of links, violating the valve timing. In this case, the internal combustion engine will also not start. A broken timing belt can be felt by noticeably lighter than usual scrolling of the starter.

Depending on the design and relative position of the valves and pistons, they can hit each other, and then you will have a serious engine repair. To avoid this, you need to change the timing belt or timing chain on time, without waiting for them to break.

If the starter turns the crankshaft normally, but the internal combustion engine does not start, fuel is probably not entering the cylinders. The fuel pump is responsible for pumping fuel.

This is a fairly reliable element of the fuel system, but it does not last forever. The habit of driving with a half-empty tank reduces its service life. The fact is that the pump is located in the fuel tank and is cooled by immersion in gasoline. When there is little fuel in the tank, the pump overheats.

If the pump does not show signs of life, it may simply not be powered. diagnose the fuse, start relay, wires and connectors.

If the fuse is blown, but the pump itself is working, this may indicate that it is operating too hard. And then, first of all, you need to replace, and also diagnose and clean the coarse mesh, which, together with the pump, is an integral part of the fuel module.

Fuel leakage, for example, due to defects in the fuel hose, cannot be ruled out. This can be signaled by the smell of gasoline in the cabin.

As for the injectors and the fuel rail, when they are clogged, the internal combustion engine starts, troits, sneezes, but somehow works. In order for the internal combustion engine to not start due to injectors or fuel lines, they must be completely clogged, which is very unlikely.

Don't forget to also diagnose the condition of the air filter. If it is heavily clogged, the cylinders will not get enough air. The lack of oxygen will not allow the combustible mixture to ignite.

Do not forget that the timely replacement of filters and other consumables will save you from many problems even before they appear.

Fuel for Chinese cars can be purchased in the Chinese online store.

Candles and ignition coils are an unlikely cause. Usually one or two candles fail, while the internal combustion engine will be able to start. But diagnosing whether the spark plugs are flooded will not be superfluous.

It's always a good idea to have a set of spare fuses in your car. It happens that one of the fuses associated with the ignition system or starter burns out, or the relay fails. Replacing them may solve the starting problem. But often the fuse burns out due to a short circuit in the wires or a faulty element in the electrical system. In this case, until the cause is found and corrected, the replaced fuse will blow again.

If the on-board computer does not receive the necessary signals from certain sensors, this may become an obstacle to starting the power unit. Usually at the same time, the Check engine lights up on the dashboard, but in some cases, for example, on older models, this may not be the case. If you have an error code reader, you can determine the source of the problem more precisely.

First of all, the following sensors should be diagnosed:

• crankshaft position;
• camshaft position;
• detonation;
• idle move;
• coolant temperature.

Where this or that sensor is located can be clarified in the vehicle’s service documentation. The most difficult case involving electronics is an ECU malfunction. If it fails completely, the machine will turn into a useless piece of iron. But more often the problem is partial. Both a software failure and a hardware defect are possible. You can’t do this without qualified help. The possibility of restoring the on-board computer depends on the nature of the defects and the qualifications of the specialist. Craftsmen are completely out of place here.

. . in the Chinese online store.

If the anti-theft system is mounted in a bad place, water, oil, dirt can get into it, which will sooner or later disable it. As a result, the ability to start an internal combustion engine is blocked. In addition, due to incorrect alarm settings, the battery can quickly discharge.

Do not save on security by buying cheap systems from unknown manufacturers. Installation also should not be trusted to just anyone.

If the crankshaft turns with great difficulty, it may be a mechanical jam. This problem occurs, although not often. It can be caused, for example, by deformation of the shafts or burrs on the moving parts of the CPG.

The generator, air conditioning compressor, and other auxiliary units can jam. This will be indicated by a strong tension on the respective drive belts during an attempt to crank the crankshaft. If the water pump of the cooling system is not driven by this belt, it can be removed to get to a car service. But this cannot be done in cases where the pump is powered by this drive. In the absence of coolant circulation, the internal combustion engine will overheat in a matter of minutes.

This is the most difficult and unpleasant case, threatening a very serious and costly repair. Compression in the cylinders may decrease due to burnt valves, pistons, compression and oil scraper rings. Among the possible reasons are the constant use of low-quality fuel, unregulated ignition, an incorrectly configured program in the computer. The latter especially applies to vehicles equipped with gas-balloon equipment. If you install HBO, contact good specialists who can correctly mount it. And do not be stingy when buying such equipment.

Read more about checking compression in ICE cylinders.

In winter, the battery is especially vulnerable and often becomes a source of problems with starting the internal combustion engine. In frosty weather, it is better to place it in an impromptu thermostat using foam, and take it home at night.

Slow rotation of the crankshaft when turning the starter is possible due to too thick grease. In frosty weather, this is not uncommon, especially if the oil is not chosen for the season. Read about choosing ICE oil.

Another specific winter problem is icy condensate in the fuel line, tank, fuel filter, or other places. The ice will prevent the supply of fuel to the ICE cylinders. The car needs to be moved to a warm garage so the ice can melt. Or, alternatively, wait for spring ...

You can read more about how to start an internal combustion engine car in cold weather in a special one.