VAZ 2107 car engines: characteristics, malfunctions and tuning

Benefits obtained by tuning an injection engine

Tuning the injector helps to unlock the full potential of the car engine. The improvement in engine performance is due to the following factors:

• portions of supplied fuel become more accurately dosed and depend on the engine operating mode;
• reducing the proportion of unburned gasoline in the exhaust leads to a decrease in environmental pollution;
• increasing the speed of reaction to pressing the gas pedal;
• Sensitivity to engine load allows you to supply the optimal amount of fuel;
• increasing engine efficiency as a result of complete combustion of a portion of the supplied fuel;
• as a result of flashing the electronic control unit, you can get rid of initially uncorrected bugs;
• all changes made to the electronic module are completely reversible;
• idle speed becomes more stable and less dependent on ambient temperature.

Typically, injector tuning is accompanied by an increase in engine power of up to 20 horsepower. If the main goal of tuning is to increase the efficiency of the car, then such a significant increase in horses is not observed. The recommended golden mean for the changes made is the maximum improvement in dynamic characteristics, accompanied by an acceptable increase in fuel consumption.

Characteristics of VAZ 2107

Initially, the seven was equipped with an engine with a capacity of 1.5 liters, but during the production process the power range was expanded.

Modifications of engines installed on the VAZ 2107.

Design nuances

To obtain the above engine characteristics, the manufacturer carried out experiments:

• piston stroke reduced to 66 mm;
• the cylinder diameter, on the contrary, is increased to 79 mm.

The result was a revving, powerful engine with an aluminum valve cover that absorbed the sounds of the drive. Another feature of the internal combustion engine is the fastening of the timing belt pulley - users do not need to unscrew the bolt on the crankshaft, unlike previous VAZ engine models.

Design 2105

In the operating instructions, the manufacturer recommends which oil to pour into the engine - 5W30 - 15W40.

Characteristics and principle of operation of the engine

The operation of the fuel injection system is to supply fuel separately to each cylinder. This mechanism is called distributor injection. All modern cars are equipped with a distribution or electronic injection system.

The injection mechanism is classified according to its operating principle, installation location and number of injectors. “Seven” is equipped with 4 nozzles, which are controlled by an electronic control unit. The ECU prepares the mixture depending on the engine load, throttle position and other parameters read by special modules.

The main control element of the VAZ 21074 injector is an electronic control unit. Using built-in sensors, the ECU monitors the quality of the air-fuel mixture supplied to the combustion chamber, sets the ignition timing depending on the speed, and turns the fuel pump on and off. In addition, it regulates the idle speed, controls the emission of CO in the exhaust gases and determines the operating mode of the cooling fan.

The VAZ 21074 injector works in the following order.

The pump supplies fuel from the gas tank through filters to the fuel rail. Next, the fuel is supplied to the injectors. The pressure in the injectors is maintained by a special regulator within 300 MPa. Excess fuel is sent back to the tank. The injector is a sprayer with a solenoid valve, which operates from ECU pulses.

By reading readings from the piston position module in the cylinder, the central unit determines the moment of opening and closing of the injector. The optimal quality of the air-fuel mixture is prepared based on the readings of the mass air flow sensor and the throttle position.

Other parameters are also taken into account:

• cooling system temperature - necessary to determine the degree of engine warm-up and adjust idle speed. The temperature correction affects the degree of richness of the mixture;
• oxygen concentration - used to measure the oxygen content in exhaust gases;
• on-board network voltages - read by the speed sensor to transmit pulses in a certain order.

How is 21074 different?

The main and, perhaps, the only difference from the beds of other sevens of various modifications is in the engine. This is a 1.6-liter (more precisely, 1,569 cc) engine with a cast-iron Fiat block and an aluminum head. Initially, the engine ran only on 93-octane gasoline, but later the compression ratio was lowered to allow the vehicle to be operated on lower grades of fuel. Since the power system still remained carburetor, there was not much difference. The seven happily consumed about 10 liters of fuel in mixed mode.

Seventy-five power and 116 Nm of torque look helpless by modern standards, but then for the country that built communism, it was proletarian chic. Even the Volga was more powerful by only a dozen forces. Toward the end of its career, 21074 still received distributed injection, although it was a different modification, 21074-10, which met Euro2 standards, and the next year an even more advanced seven 21074-20 with an injector appeared, which could meet Euro3 standards. But the injection versions of the six engine completely abandoned 92 gasoline and required only high-octane 95 gasoline.

Characteristics and principle of operation of the engine

The operation of the fuel injection system is to supply fuel separately to each cylinder. This mechanism is called distributor injection. All modern cars are equipped with a distribution or electronic injection system.

The injection mechanism is classified according to its operating principle, installation location and number of injectors. “Seven” is equipped with 4 nozzles, which are controlled by an electronic control unit. The ECU prepares the mixture depending on the engine load, throttle position and other parameters read by special modules.

The main control element of the VAZ 21074 injector is an electronic control unit. Using built-in sensors, the ECU monitors the quality of the air-fuel mixture supplied to the combustion chamber, sets the ignition timing depending on the speed, and turns the fuel pump on and off. In addition, it regulates the idle speed, controls the emission of CO in the exhaust gases and determines the operating mode of the cooling fan.

The VAZ 21074 injector works in the following order.

The pump supplies fuel from the gas tank through filters to the fuel rail. Next, the fuel is supplied to the injectors. The pressure in the injectors is maintained by a special regulator within 300 MPa. Excess fuel is sent back to the tank. The injector is a sprayer with a solenoid valve, which operates from ECU pulses.

By reading readings from the piston position module in the cylinder, the central unit determines the moment of opening and closing of the injector. The optimal quality of the air-fuel mixture is prepared based on the readings of the mass air flow sensor and the throttle position.

Other parameters are also taken into account:

• cooling system temperature - necessary to determine the degree of engine warm-up and adjust idle speed. The temperature correction affects the degree of richness of the mixture;
• oxygen concentration - used to measure the oxygen content in exhaust gases;
• on-board network voltages - read by the speed sensor to transmit pulses in a certain order.

Malfunctions of the engine with distributed injection

In any mechanism during its operation, certain breakdowns occur. The injection engine of the “Seven” is not immune from this. There are many faults and they are different, let’s look at the main, most common ones:

• unstable and unstable operation of the engine without load;
• clogged injectors;
• increased gasoline consumption;
• the permissible norm of CO2 in exhaust gases has been exceeded;
• when the throttle valve is opened sharply, dips in engine speed are formed;
• the power plant does not “pull”, power decreases.

To correct these defects, it is better to contact a specialized workshop. Specialists will carry out diagnostics using a computer with a specific program. They will determine the causes of failures, check whether the sensor readings are correct or not, and evaluate the operation of the ECU. After this, the necessary repairs will be carried out using equipment.

We make changes to the engine design

A significant increase in power can be achieved by modifying the engine of the VAZ-2106 car, which requires experience and the implementation of a whole range of measures:

First we bore the cylinders so that their diameter is 82 millimeters. In addition, we reduce the length of the piston skirt by a few millimeters

At this stage, it is important not to overdo it so as not to spoil the parts; after this we install connecting rods and a flywheel made of light metal alloys; the next stage is milling the cylinder head. You will need to remove no more than one millimeter to achieve the desired effect; grinding intake and exhaust manifolds

This procedure will reduce the resistance to the air-fuel mixture, which will automatically increase the power of the power unit; installation of the electronic ignition system already mentioned above; installation of a new distributor equipped with a Hall sensor; installation of a tube in the exhaust manifold that will connect it directly to the intake manifold.

In order to get the desired effect after all the steps described above, it is better to use molybdenum oil (or a lubricant with molybdenum additives). You will also need to fill the tank with A-95 or A-98 gasoline. If these conditions are met, the power increases to 110 horsepower.

The increased power characteristics of the VAZ-2106 will require flawless operation of the braking system and suspension, so a number of changes will need to be made to them. At the last stage, the gearbox is also modernized, ensuring the most comfortable control of the car.

Engine tuning

By analogy with the manufacturer’s previous internal combustion engines, the 2105 engine can increase power in several ways:

• boring the cylinders to fit the size of the larger piston;
• increasing the stroke length of the connecting rod;
• installation of a sports camshaft;
• installation of 4 or 2 carburetors;
• boring of cylinder head channels.

Tuning 2105

Thus, the ICE 2105 produced by AvtoVAZ was not produced for long. The engine consumed little oil; boosting it on its own was extremely difficult for Soviet-era motorists.

If you have any questions, leave them in the comments below the article. We or our visitors will be happy to answer them

Problems with the DAAZ 2107 carburetor

Despite the fact that the device is reliable and durable, units that are more than 30 years old are also in use today. During such a period of use, the likelihood that the car owner will encounter various kinds of problems is quite high.

What malfunctions are typical for Dimitrovgrad-made carburetors:

The engine stalls when you press the gas

At the moment of start or when idling, the power unit may stall when the driver smoothly presses the pedal.

Why does this happen:

• The holes in the transition system of chamber 1 may become clogged. They need to be blown out or treated with a cleaner.
• The accelerator pump is broken. It is replaced or repaired.

It is also possible that when moving while gas is supplied, the engine jerks and may stop. To prevent this, you urgently need to press the pedal again.

What does this mean:

• The channels, jets or emulsion well are clogged. The defect can be eliminated by cleaning the elements.
• The nozzle of the dosing system of chamber 1 is not screwed in completely. It needs to be wrapped.
• The jets are not selected correctly.
• The fuel level in the float chamber is insufficient, which is regulated by setting the float and valve.
• The filter installed at the inlet is dirty. It needs to be dismantled and cleaned.
• Poor condition of sealing elements that need to be replaced.

The ignition system may also be faulty.

Pouring gasoline

This problem is encountered quite often. Usually it lies in a malfunction of the metering units or the vehicle’s fuel system.

• malfunction or leakage of the needle valve;
• leakage or breakdown of the float;
• the float touches the walls when moving around the chamber;
• the fuel level in the float chamber is exceeded;
• the jets supplying air are clogged;
• fuel pump failure.

Knowing the design of the carburetor, it is not difficult to find the source of the problem.

Shoots

The power unit may shoot into the carburetor. Such pops can be heard both at start and when moving at speed. This leads to high fuel consumption, engine overheating, unstable idling, and also to the fact that the engine cannot develop full power. Shooting indicates improper adjustment of the fuel-air mixture preparation and gas distribution system.

Gasoline is not supplied

If fuel does not flow into the carburetor, there can be many reasons.

Main sources of problems:

• fuel filter contamination;
• ice formation in the gas pipeline;
• leaks at fuel line connections;
• interference in the hose that comes from the gas tank;
• fuel pump failure;
• contamination of the carburetor filter element.

The second camera does not work

In carburetors with two chambers, it is possible to increase the efficiency of the power unit while maintaining excellent power parameters. However, the 2nd compartment often fails.

The malfunction may be related to:

• flooding due to contamination of fuel channels;
• incorrect clearance settings;
• malfunction of the throttle valve drive;
• poor condition of the pneumatic drive diaphragm;

failure of any elements: jets, diffuser, economizer XX, etc.

Accelerator pump does not work

Problems in the functioning of this unit lead to the fact that gasoline does not flow or is supplied under the wrong pressure, resulting in difficulties with acceleration. As a rule, the reason for the lack of fuel supply is a clogged fuel nozzle of the accelerator unit or a ball sticking to the check valve bushing

If the jet does not have enough pressure, you should pay attention to the condition of the ball and its position, as well as the leakage of the diaphragm connection, which is located between the top cover and the body. To fix the problem, you need to clean the components and evaluate their condition.

Service

This section includes changing the oil and adjusting the valves (8 and 16 valve engines).

Experts recommend changing the oil every 15 thousand kilometers. If you do not comply with these requirements, the power unit will quickly fail. The fact is that oil loses its properties over time and accumulates many harmful substances. Without changing the oil and flushing the engine, the car will not last long. The VAZ 2110 engine mounts are also being replaced.

Procedure during draining:

• Unscrew the plug located under the bottom of the power unit. In this case, you can use a special key;
• Carefully drain the used oil so that it does not get on your skin. If you are not careful, you can get a very serious burn to the skin as the oil is very hot;
• Next, you can wipe the bottom of the power unit to get rid of any remaining oil;
• Screw the plug back;
• We unscrew the oil filter, which is located under the hood of the vehicle. To make your work easier, you can use a set of keys. We also replace the engine mount;
• Coat all filter gaskets with a thin layer of oil. This is necessary so that the filter can easily fit into the fitting place. The force applied should be monitored very carefully. If you exaggerate with force, you will strip the thread.

Actions during pouring:

1. Carefully unscrew the filler cap;
2. We take new oil in our hands and begin to pour it into the neck in the amount of three liters. In this case, you need to monitor the level so as not to overfill. Otherwise, the oil will end up in unnecessary areas of the engine;
3. Next, you can start the power unit and wait a few minutes until the system warms up and the oil goes through several circles. Only after 20 minutes can you check the oil level. If it is not enough, then feel free to add more. In other cases, the process is completed, you can screw on the cover and put in the replaced engine mount;
4. We also check the dashboard. The Check Engine light should not be on.

This process is the most complex and quite interesting. The performance of the power unit and its stability will depend on the correctness of the actions.

If you want to tune the VAZ 2110 engine, then adjusting the valves can be classified as some kind of tuning.

The adjustment is carried out using the device:

1. Open the valve mechanism cover and completely remove the timing belt cover;
2. We install a device that will allow you to easily carry out all the actions;
3. We put the necessary marks on both the crankshaft and the camshaft. They are necessary for proper adjustment. You should also check the timing belt. It should be taut, not hanging;
4. Checking the gap;
5. Next, unscrew the washer and replace it with a new one according to the formula:

• where A is the measured gap;
• B – thickness of the removed washer;
• C – nominal gap;
• N – thickness of the new washer.

Characteristics of oils for VAZ

The service life of the engine depends on the correct selection of oil for injection VAZ 2107. The recommended quality standard for the lubricating fluid is given by the manufacturer. Any type of oil that meets API SJ/CF, SG/CD quality standards can be filled into the car.

The abbreviation API means that a lubricant meets the following basic criteria:

• cleaning properties;
• temperature regime;
• indicator of deposits on engine components before the first oil change;
• release of harmful substances;
• corrosive properties;
• effectiveness of protecting components from friction.

It is recommended to use the following types of oils.

Description of the advantages and disadvantages of VAZ 2107 injectors

The design of an injection-type engine gives every reason to talk about undeniable advantages in comparison with carburetor engines:

1. The efficiency is much higher, and fuel consumption is correspondingly reduced.
2. The engine power has higher performance with volumes similar to carburetor engines.
3. Engine stability at idle speed.
4. Guaranteed cold start.
5. There is no need to adjust the ignition system and gasoline supply.
6. The optimal composition of the air-fuel mixture helps reduce the amount of harmful elements in the exhaust gases.
7. No noise effects when the engine is running due to the presence of a hydraulic chain tensioner and a hydraulic compensator that regulates valve clearances.
8. Achieving high torque at different speeds.

Injection engines can also run on gas. The most preferred is the fourth generation of gas equipment.

The most common shortcomings include the following:

• The injection engine, located in the former inconvenient engine compartment, has difficult access to working units and parts.
• Increased requirements for the quality of gasoline; when using low-quality fuel, accelerated contamination of the fuel system is observed, requiring unscheduled maintenance activities.
• If the injection system fails, it is necessary to contact the services of specialists so that they carry out the necessary maintenance, adjustments, and restoration of engine operation.

It has become not so easy to independently find a breakdown and repair the VAZ 2107 injection engine with your own hands. The engine overhaul is also carried out in auto repair shops equipped with specialized equipment.

Reliability, weaknesses, maintainability

Reliability

The VAZ-2105 is considered a fairly reliable engine. An important indicator of reliability is mileage. The declared 125 thousand km in practice is exceeded almost three times. It all depends on the car owner’s attitude towards the engine.

When communicating on thematic forums, car enthusiasts emphasize the reliability of internal combustion engines. For example, Dmitry from Odessa writes: “... from service I only fill up with gasoline. I bought it for work, I travel 200 - 250 km a week, the load is 100 -150 kg every day. The engine is just super..." (Most likely, delight in the near future will end in disappointment with such “service”).

By the way, the vast majority of car owners report timely maintenance. In their opinion, this is why the engine runs without problems.

The reliability of the motor is indicated by its high safety margin. It must be remembered that increasing power significantly reduces mileage.

Although the use of simple types of tuning (replacing the carburetor, etc.) will give a slight increase in power, reliability will not suffer from this.

For lovers of powerful engines, it is easier to consider the option of a swap than to remake an installed VAZ-2105.

Weak spots

The engine is prone to malfunctions that are typical for all VAZ engines. It is worth noting that the majority of malfunctions are caused by car owners themselves.

• Noisy engine operation. This is usually due to unadjusted valve clearances. The manufacturer recommends performing this work after 10 thousand kilometers.
• Overheat. Caused by a faulty thermostat or faulty cooling fan.
• Engine tripping. The reason must be sought in the electrics. Checking the spark plugs, high-voltage wires, cover and distributor of the breaker (distributor) is often enough to find the fault and restore normal engine operation.
• Unstable engine speed. As a rule, clogged filters or carburetor jets cause this particular problem. Cleaning them eliminates the problem.
• Destruction of the cylinder head gasket. This is perhaps the only weak point in the engine, where the blame lies entirely with the manufacturer. Of course, if the engine did not overheat.

Other problems also arise, but they are not critical and can be easily fixed on your own (leaks of technical fluids through seals, oil seals, etc.).

Engine optimization options

Many drivers tune the VAZ 2107 engine in order to improve performance and increase power. An important factor that affects power performance is clean injectors. Their contamination reduces engine performance, impairs efficiency, reduces the injected volume of fuel, which will lead to failures when pressing the gas pedal.

The first is cleaning and bench testing.

The permissible imbalance should be within 1.5%. If the deviation is more than:

• 2.5% - fuel consumption increases;
• 3.5% - unstable operation at idle, difficult cold start;
• 4% - dips occur during sudden acceleration;
• 5% - the engine does not start well, a persistent tripping appears.

The second option is to use special flushing fluid and equipment. Cleaning can be done at home. To do this, you need to dilute the flushing fluid with gasoline and add it to the power system. As a result, the deposits are corroded and enter the cylinder, where they are completely burned.

The quality of the oil used has a great influence on keeping the car in working condition.

Characteristics of the VAZ-2107 engine

One of the main characteristics is the engine power of the VAZ-2107, which can vary depending on the modification of the car. For example, since its appearance on the domestic market (1976), three models with carburetor engines have been produced:

• VAZ-2107 1.5: engine capacity 1451 cm 3, power 72 kilowatts;
• VAZ-21072 1.3: volume 1290 cm 3, power 64 kilowatts;
• VAZ-21074 1.6 l. s: engine capacity 1569 cm 3, power 74 kilowatts.

In addition, the manufacturer has released two modifications of the car with an injection power unit - 2107i 1.6 (engine power 70 kilowatts) and 1.6MT (73 horsepower). It is impossible not to mention the 21073 1.7 model with central injection of the air-fuel mixture. This type of “seven” uses AI-95 gasoline as fuel (other models use AI-92), has an engine capacity of 1689 cm 3 and boasts the highest power of 76 horsepower.

Engine power directly depends on cylinder volume. Carburetor modifications of power units are still considered the most reliable and can be used for a long time without requiring complex maintenance and repairs. At the same time, injection engines are much more powerful, but they immediately require contacting a car service even with the slightest failure or malfunction. In addition, engines equipped with an injector consume gasoline more economically, which is a very important selection criterion today.

It is very important to know that no car will be able to demonstrate the power declared by the manufacturer for a long time if the requirements for its operation are not fully complied with. Therefore, it is necessary to regularly replace the engine oil and oil filters, as well as the coolant.

Severe overheating or lack of lubrication leads not only to a decrease in power, but also to serious damage to individual elements of the power unit.

The weight of VAZ-2107 car engines is on average 120 kilograms. This significantly complicates the work of dismantling or repairing them and requires the use of special equipment (beam crane).

VAZ 2107 is a five-seater passenger car of a classic layout with a front longitudinal arrangement of the power unit and rear drive wheels. The engine is a four-cylinder, four-stroke, eight-valve, in-line, carburetor or fuel injection system. The body is a supporting structure, all-metal, welded. Body type - sedan.

Overall dimensions of VAZ 2107

The VAZ 2107 car is equipped with a carburetor engine of the VAZ 2103 model with a working volume of 1.5 liters. The modification of the VAZ 21074 car is distinguished by the engine of the VAZ 2106 model with a displacement of 1.6 liters.

In recent years of production of this model, modifications of the VAZ 2107-20 car with a VAZ 2104 engine with a displacement of 1.5 liters and VAZ 21074-20 with a VAZ 21067 engine with a displacement of 1.6 liters, equipped with fuel injection, mechanical part (cylinder block, connecting rod) were produced -piston group, crankshaft) of these engines are respectively identical to the VAZ 2103 and VAZ 2106 engines. The VAZ 2104 and VAZ 21067 engines are equipped with more powerful generators and starters with planetary gearboxes. The installation of engines with distributed fuel injection in cars, as well as the use of a gasoline vapor recovery system and catalytic converters in exhaust systems, made it possible to reduce the toxicity of exhaust gases and fuel consumption, and increase the reliability of engine starting in cold weather. The body, chassis and transmission remained unchanged.

The predecessor is the VAZ 2105, the successor is the Lada Granta.

What engine can be installed on this car?

Initially, 2 types of engines were installed on the VAZ 2107 model, these are:

• VAZ 2103, with a working volume of 1.5 liters
• VAZ 2106, with a working volume of 1.6 liters

Let's look at them next.

There were also 1.3 L and 1.2 L engines, but they are very few in number and practically never found.

It is also possible to install an engine from a VAZ with front-wheel drive, but it is too labor-intensive and unjustified.

This is interesting! Sometimes the English letter “i” is added before the name of the car. This means that the VAZ 2107 engine is an injector.

Injector – fuel sprayer. Nozzle. The principle of operation of injection gasoline engines is very similar to diesel engines.

Characteristics of the car 2107

Dimensions Length: 4145 mm Width: 1620 mm Height: 1435 mm Wheelbase: 2424 Front track: 1365 Rear track: 1321 Ground clearance: 170 mm Maximum trunk volume: 325 l Curb vehicle weight: 1060 kg Permissible gross weight: 1460 kg Turning circle: 9.9 m

Carburetor-type engine versions are marked 2103 and 2106. The main malfunctions are associated with floating engine speeds, tripping and overheating. Thanks to its simple design, repairing the power unit is quite easy.

Injection versions of the VAZ 2107 engine are considered more modern. In the VAZ 2107, the air-fuel mixture in the cylinders is obtained thanks to a separate injection system. The injector has 4 nozzles, which are controlled by a microcontroller. Fuel supply is regulated depending on various parameters of the vehicle’s condition.

The efficiency of the VAZ 2107 injection engine is higher than that of the carburetor engine. The engine is resistant to idling and rarely stalls when starting from a standstill thanks to sophisticated electronics. The motor has low noise thanks to automatic chain tension adjustment.

Piston

On pistons 2112, the wells have a depth of 3.19 mm for the inlet and 3.06 mm for the exhaust.

The piston pin is steel, hollow, floating type. The outer diameter of the piston pin is 2112–22 mm, the length of the pin is 60.5 mm. The hole for the piston pin is shifted from the center plane of the piston by 1 mm.

Characteristics and principle of operation of the engine

The operation of the fuel injection system is to supply fuel separately to each cylinder. This mechanism is called distributor injection. All modern cars are equipped with a distribution or electronic injection system.

The injection mechanism is classified according to its operating principle, installation location and number of injectors. “Seven” is equipped with 4 nozzles, which are controlled by an electronic control unit. The ECU prepares the mixture depending on the engine load, throttle position and other parameters read by special modules.

The main control element of the VAZ 21074 injector is an electronic control unit. Using built-in sensors, the ECU monitors the quality of the air-fuel mixture supplied to the combustion chamber, sets the ignition timing depending on the speed, and turns the fuel pump on and off. In addition, it regulates the idle speed, controls the emission of CO in the exhaust gases and determines the operating mode of the cooling fan.

The VAZ 21074 injector works in the following order.

The pump supplies fuel from the gas tank through filters to the fuel rail. Next, the fuel is supplied to the injectors. The pressure in the injectors is maintained by a special regulator within 300 MPa. Excess fuel is sent back to the tank. The injector is a sprayer with a solenoid valve, which operates from ECU pulses.

By reading readings from the piston position module in the cylinder, the central unit determines the moment of opening and closing of the injector. The optimal quality of the air-fuel mixture is prepared based on the readings of the mass air flow sensor and the throttle position.

Other parameters are also taken into account:

• cooling system temperature - necessary to determine the degree of engine warm-up and adjust idle speed. The temperature correction affects the degree of richness of the mixture;
• oxygen concentration - used to measure the oxygen content in exhaust gases;
• on-board network voltages - read by the speed sensor to transmit pulses in a certain order.

Disadvantages and advantages of the model

The VAZ 2107 engine injector has a number of advantages over carburetor modifications:

• the electronic control mechanism ensures stable operation of the engine under any operating conditions;
• the presence of a catalyst and an optimal air-to-fuel ratio reduces the amount of harmful substances in the exhaust gases;
• starts well in cold weather and stalls less often if started incorrectly;
• valve clearances and chain tension are adjusted automatically, which reduces the noise of the power unit;
• smooth torque diagram - the highest point is reached in a wide rev range.

Along with the positive qualities, there are some disadvantages:

high demands on fuel quality

Using low-quality gasoline will clog filters, injectors and damage the booster pump; the exhaust pipe catalyst is located low, so you need to drive through obstacles carefully; little space in the engine compartment. This makes it difficult to reach some nodes

However, injection power has a long service life and does not require frequent maintenance; cannot be repaired in a garage. If any malfunctions occur, please contact the service center. Diagnosis of breakdowns is carried out using special equipment that reads data from sensors and computers; The presence of automatic equipment increases the cost of repairs.

Operational features and popular love

There is no particular need to talk about any dynamic characteristics of the VAZ 21074 with a classic carburetor. Stock sevens could accelerate to hundreds in 16 seconds. During this time, a Volkswagen Golf of the same year of production could accelerate to 200 km/h, and a mid-range sports car could enter Earth orbit, but that was not why the seven was valued. And they appreciate it now.

They loved it for its unpretentiousness in repairs, ease of maintenance, and for the fact that in every village store you could buy at least a ball joint, a head gasket, or a carburetor repair kit. Moreover, all the repairs could be done with your own, even not very skillful, hands, and a good breakdown of a reliable Fiat engine happened extremely rarely, and even then due to the driver’s oversight. The Seven with the 2106 engine was loved for its timing chain drive. The fact is that on the five-wheel engines that were installed on version 21072, the timing drive was belt driven, which meant that if the belt breaks, bending of the valves and failure of the cylinder head is guaranteed unless pistons with special “five-point” grooves are installed. The engine made less noise, but was 3 horses weaker.

Causes of injector clogging

Typically, problems with the injection system occur when using low-quality gasoline.
Heavy paraffins contained in such fuel settle on the walls of the system, cutting off the fuel supply. Manufacturers of high-quality gasoline add detergent to it - a special additive that dissolves deposits. Low-quality gasoline contains too much paraffin, which forms deposits faster than detergents can remove them. Deposits form more intensively at low temperatures, so when the car is frequently driven with a cold engine, the injector becomes clogged more often. Deposits can accumulate not only in the injectors. Often vapors settle on the throttle valve, which leads to a change in the proportions of the air-fuel mixture entering the cylinders.

Deposits of substances contained in low-quality gasoline may also appear on the back of the intake valve plates. This can lead to valve burnout or fuel detonation.

To clean the injection system of deposits, it is necessary to use special flushing fluid and equipment. You can wash the injector in a garage. To do this, you need a syringe and washing liquid. The latter is mixed with gasoline and poured into the injection system through the hose of the vacuum brake booster. First, the operation is performed with the engine turned off, then with the engine running. The mixture is fed into the running engine gradually, in small portions. As a result, the deposits dissolve, enter the engine cylinders and burn there. In this case, clouds of smoke may briefly appear coming out of the muffler.

The power unit of the injection VAZ 2107 was the first at AvtoVAZ in a number of injection models. Therefore, the new product raised many questions and comments: Soviet drivers did not know how to maintain and repair such an engine. However, practice has shown that the injection equipment of the “Seven” is very practical and convenient, and also allows for a number of alterations and modifications for the driver himself.

Swan song 2107 or interrupted flight

This version was discontinued either in 2002 or five years later. This inaccuracy is associated with the anarchy that reigned at that time on the VAZ assembly line and at the assembly facilities in Izhevsk. Then the sevens were assembled from what was available and few people thought about the conformity of the modification. In addition, there was a directive to reduce the cost of the car design as much as possible. For example, in the middle of the first decade of the 11th century, you could buy a seven with the following factory tuning:

There may be no ashtrays on the rear door cards;

soft two-layer plastic could be missing, and instead of it, ordinary oak plastic could easily be found;

the armrest handles could also be cast from this very hard plastic;

the horns in the latest versions resembled moped tablets, which, when first wet, emitted a gentle squeak instead of the powerful signal of the standard seven horn;

the door pillars are no longer painted black;

The combined moldings along the sides disappeared.

It was also often possible to find new sevens without headlight washers at all. But all this did not stop the public and they willingly bought cars. Habit is a great thing, it works better than any marketing. Do not offend the old sevens and they will serve faithfully for decades to come. Good roads and optimism to everyone!

The first “seven” rolled off the VAZ assembly line in 1982, and with its design it created a real sensation. In comparison with its predecessor, the “five”, it looked much more solid: a chrome radiator grille, an improved shape of the rear headlights, an updated instrument panel, complemented by a tachometer and a number of new sensors, and one-piece anatomical seats. For such “chic”, the VAZ 2107 was even called the Russian “Mercedes” in the southern regions of the USSR.

Characteristics of oils for VAZ

The service life of the engine depends on the correct selection of oil for injection VAZ 2107. The recommended quality standard for the lubricating fluid is given by the manufacturer. Any type of oil that meets API SJ/CF, SG/CD quality standards can be filled into the car.

The abbreviation API means that a lubricant meets the following basic criteria:

• cleaning properties;
• temperature regime;
• indicator of deposits on engine components before the first oil change;
• release of harmful substances;
• corrosive properties;
• effectiveness of protecting components from friction.

It is recommended to use the following types of oils.

Fuel consumption

• Fuel consumption in urban conditions is 9.4 liters per 100 km.
• On a flat road at cruising speed it will already be 6.9 liters per 100 km.
• In mixed mode, consumption will be from 8 to 9 liters per 100 km. Such figures do not allow us to call this engine economical, but in this case a lot depends on the driver himself.
• Another parameter that depends on the driver is oil consumption per 100 km. For the average driver of a car with this engine, it is 700 g per 100 km. This, of course, is not small, but with careful driving you can reduce this consumption down to 450-500 g/100 km.
• The weight of the 2103 engine when fully assembled is 121 kg.

What cars were equipped with ICE 2105?

This modernization could not satisfy users of the domestic automobile industry. The main drawback was the regular breakage of the timing belt, AvtoAZ management reduced production volumes, then removed the 2105 engine from production, so only three modifications of the Zhiguli were equipped with the engine:

• 2105 sedan;
• 2104 station wagon;
• 21072 sedan.

Four with engine 2105

Currently, tuning for the engine of this series is not difficult, but among the operating fleet of Zhiguli “fives” with the “native” engine there are very few left.

REVIEW OF THE VAZ-21074 INJECTOR MODEL

The beginning of serial production of VAZ-21074 cars dates back to 1982, when the first copies of this model rolled off the assembly line of the Volzhsky Automobile Plant. At that time, the car was equipped with a carburetor power system: the injector on the VAZ-21074 appeared only in 2006. The advantages of the injection method of fuel supply are no longer a revelation to anyone, and after this system was implemented on the VAZ-21074:

• the engine began to start better in conditions of negative temperatures, without requiring prolonged warm-up;
• at idle speed the engine began to operate more smoothly and quietly;
• fuel consumption has decreased.

The injection version of the VAZ-21074 replaced the carburetor version in 2006

The disadvantages of the VAZ-21074 include:

• low location of the exhaust pipe catalyst, which increases the risk of damage to this expensive part;
• inaccessibility of some parts and sensors, which was a consequence of the fact that the old type of body was not designed for an injection system - in the carburetor version there is much more space under the hood;
• low level of noise insulation, which reduces the level of comfort of the car.

The presence of a computer control unit allows you to respond in a timely manner to the occurrence of malfunctions, since a signal about a breakdown is immediately sent to the instrument panel. The control circuit for the operation of the engine and its systems used in the VAZ-21074 allows you to control the composition of the fuel mixture, turn the fuel pump on and off using electronics, and continuously monitor all components and mechanisms.

The control circuit of the VAZ-21074 allows you to respond in a timely manner to malfunctions of systems and mechanisms

The control scheme includes:

1. Motor diagnostic block;
2. Tachometer;
3. Control system fault monitoring lamp;
4. Throttle sensor;
5. Throttle valve;
6. Radiator cooling fan;
7. Fan relay;
8. Control block;
9. Ignition coil;
10. Speed ​​sensor;
11. Ignition section;
12. Temperature sensor;
13. Crankshaft sensor;
14. Fuel pump relay;
15. Fuel tank;
16. Gasoline pump;
17. Bypass valve;
18. Safety valve;
19. Gravity valve;
20. Fuel filter;
21. Canister purge valve;
22. Reception pipe;
23. Oxygen sensor;
24. Battery;
25. Egnition lock;
26. Main relay;
27. Nozzle;
28. Fuel pressure control;
29. Idle air control;
30. Air filter;
31. Air flow sensor.

A plate with identification data of the VAZ-21074 car can be found on the bottom shelf of the air intake box, which is located under the hood near the windshield, closer to the passenger seat. Next to the plate (1) is stamped VIN (2) - the vehicle identification number.

The plate with the identification data of the VAZ-21074 car can be found on the bottom shelf of the air intake box

The passport data on the plate is:

1. Parts number;
2. Manufacturing plant;
3. Indication of conformity and vehicle type approval number;
4. An identification number;
5. Power unit model;
6. Maximum permissible force on the front axle;
7. Maximum permissible load on the rear axle;
8. Version and equipment;
9. Maximum permitted vehicle weight;
10. Maximum permitted weight with trailer.

The alphanumeric characters on the VIN number mean:

• the first three digits are the manufacturing plant code (in accordance with international standards);
• the next 6 digits are the VAZ model;
• Latin letter (or number) - year of manufacture of the model;
• the last 7 digits are the body number.

The VIN number can also be seen in the trunk on the left rear wheel arch connector.

The VIN number can also be seen in the trunk on the left rear wheel arch connector

Brake system

Parking brake with manual cable drive on the brake pads of the rear wheels

Where is the engine number

Each vehicle model produced at the factory is equipped with an engine with a personal number. So, the engine number on the “seven” is its identification number, which can be used to determine the identity of the stolen car and its history.

The engine number is stamped on the cylinder block on the left side, immediately below the distributor. In addition, the number is duplicated in the summary table, which is attached below the air supply housing. The metal plate contains information about the car, such as model, body number, model and number of the engine unit, equipment, etc.

How much does Zhigulevsky weigh?

The Lada Seven, according to documents, has a mass of 1049 kg. However, her weight

practically no different from any other brand of car from the Volzhsky Automobile Plant.
The average weight
of this Soviet car, which is often scrapped, is around one ton.

Hello, my name is Evgeniy Sokolov. Since childhood I have been fascinated by cars, especially how they work

And I received the appropriate technical education. In my blog I write reviews of models, technical characteristics and operating experience of various industrial and agricultural special equipment.

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