The reasons for the lean mixture on the injector: we understand the problem

There are a lot of car malfunctions, because of which further operation of the vehicle becomes problematic. Such malfunctions include the error of the car with the number P0171 or 0171. These numbers indicate the presence of a premature mixture. The reasons for the lean mixture on the injector are quite diverse. First of all, it is necessary to look at the state of the machine while using the poor mixture.

Signs of a lean mixture

The error is displayed on the BC screen. This indicates that the amount of fuel in the air-fuel mixture is significantly less than air. The presence of a poor mixture is manifested in the form of misfiring or a delay when the gas pedal is pressed hard. In other cases, the engine may or may not completely stop its operation at idle. In addition, at the moment of acceleration the vehicle jerks, and the engine sound is completely different and differs from the sound of the motor during normal operation. The work of the power unit when using a lean mixture is not at all stable.

The norms of the mixture index and possible consequences

For cars with the "Euro-2" or higher standard, a special sensor - a lambda probe - was installed on the engines. It controls the quality of the mixture produced. By the standard it is established that one part of the fuel accounts for 14 parts of air. If there is a minimum deviation of 0.25, the on-board computer will give an error about the poor mixture. When a premixed mixture enters the engine, not only dips in operation appear, but also the possibility of engine overheating. The speed of dials is quite low. In addition, if you do not carry out qualitative diagnostics and do not eliminate the reason for the formation of a poor mixture, the consequences will become much worse:

• Overheating of the power unit;
• Burnt piston rings;
• Burnout of valves;
• Low engine thrust;
• Burnout of pistons;
• Increased consumption of fuel and coolant.

Reasons and how to identify them

The reasons for the poor air-fuel mixture (injector) are quite simple and lie in the work of the car. Identify them with the help of engine diagnostics. First of all, the presence of such is evident from the deposits on the candles. Also, the causes of the lean mixture on the injector are associated with malfunctions in the fuel injection system. It is responsible not only for supplying fuel to the power unit, but also for the correct preparation of the air-fuel mixture. In this case, maybe the problem is related to the adjustment of the fuel or air supply. Because of this, the mixture is also remanufactured. To solve the problem, the car owner should contact the specialists for assistance, since the injection system malfunction can cover sensor malfunctions, improper adjustment of the throttle valve angles. Also it happens the rally of the part of the firmware on the electronic control unit ICE. It is worth remembering that the composition of the mixture can change to some values only for a minimal short time. Otherwise, you need to look for the problem and fix it.

What to do if an error occurs

The reasons for the poor mixture on the injector (VAZ 2110 including) can be eliminated on their own, but the best solution will be to drive the vehicle to a specialized workshop where the mechanics will carry out qualitative diagnostics and will be able to detect other malfunctions in the vehicle operation. Referring to the SRT is also because most drivers simply do not know how to control and adjust the composition of the air-fuel mixture being created. As a rule, on the engine injectors and on the carburetor this option is available to the car owner. As an example, adjust the throttle angle. To do this, it is enough to change the position of the lock ring, alternately moving it through the special slots of the flap.

Self-adjusting

Most drivers are very happy that they are able to adjust the angle of throttle position, as they are fully confident that this will adjust the fuel consumption. In addition, some resort to the firmware of the electronic control unit of the vehicle. In order not to disable some of the units or the computer, it is worthwhile to ask for help from qualified masters who can improve certain parameters of the car with the help of special programs, without affecting the quality of the mixture. Otherwise, there is a growing risk of "killing" the engine of your vehicle. Thus, a poor mixture is formed on the injector, the reasons (2114 not exception) which lie in self-adjusting corners or the intervention of an inexperienced car owner in the operation of the engine system.

Fuel system malfunction

Other causes of the lean mixture on the injector are the improper operation of the vehicle's fuel system . As a rule, violations in work are due to low-quality fuel, which is poured into little-known gas stations. To one of the variants of unstable engine operation and the formation of a lean mixture it is necessary to include the clogged fuel elements of the car. In such cases, there is a skipping in the engine. As a result, the car can twitch. To prevent this from happening, it is necessary to purchase fuel only from checked gas stations. Also it is necessary to make a timely replacement of both fuel cells. Remember that one filter is represented on the injector in the form of a mesh and installed directly into the fuel pump. The second element is most often located near the tank on the bottom of the car, less often - in the engine compartment. In order to avoid overfilling the mixture, it is necessary to change them at intervals not less than once per 40,000 km. Sometimes this indicator can be lower, since everything depends on the quality of gasoline.

Clogged injectors

If you do not carry out the timely replacement of the fuel cells of the car system, a poor mixture can form on the injector, the causes of which will be covered in the wrong operation of the injectors. That is, the fuel arrives, but is supplied in a sufficiently low quantity. The nozzle is a special device related to the vehicle injection system. There are many elements: electromagnetic, electro-hydraulic or piezo-hydraulic. On cars with gasoline engines, electromagnetic parts are used. The cause of the malfunction is as follows. Fuel filters that are not replaced in time begin to pass fuel along with foreign substances with time, without conducting a qualitative cleaning. Since the nozzles and nozzles of the nozzles are small enough, the incoming fuel with foreign pollutants form deposits on the walls, because of this, and so the small diameter of the passage of fuel decreases even more. As a result, the engine does not receive the required amount of fuel and there are problems with the poor mixture.

To solve the problem, it is possible to restore the previous injection by flushing the nozzles, which is carried out only with the use of special equipment.

By the way, in order to avoid contamination of fuel filters and injectors, it is necessary to clean the fuel tank with a small periodicity, since there is a large accumulation of dirt, sand or other substances.

Other causes and methods of solution

In the system, a poor fuel mixture is formed on the injector. The reasons can be different. For example, it can be formed due to the presence of air sucking from foreign objects, so you should inspect the nozzles and hoses that come from the air filter for tight sealing. Another cause may be a crack in the intake manifold. In the end, you will have to replace it. The cost of this part is quite high. In addition, the air is sucked from the sensor XX. It is worth checking the O-ring at the installation site.

Uncertain reasons

In other situations it happens that a poor mixture forms on the VAZ 2107 on the injector, the reasons for this are completely unknown. The performed diagnostics indicate the presence of a malfunction with the poor mixture, but does not allow to determine the cause that led to its formation. In this case, you have to look at random - view all the systems. First, the causes of a lean mixture on the injector can be caused by dirt deposits on the connector plugs, which hinders the proper operation of the engine. Also, inspect the appropriate nozzles for air leakage. It is also necessary to flush the injector itself, because due to poor gasoline, a strong deposit is formed on the walls inside. This article examined all the main reasons that influence the formation of a lean mixture, so that the driver will expand his horizons and can otherwise repair himself. If you are a novice motorist, do not have no experience of repair, it is better to send the car for diagnosis in the SRT. And most importantly - remember that timely elimination of the problem will increase the service life of your unit.