The fuel consumption of the VAZ 2107 per 100 km depends on many factors. These include the following: vehicle speed, engine type and fuel supply system. What is the fuel consumption of a VAZ 2107 with a carburetor? According to documents for this model of car, the average fuel consumption on the highway is 6.8 liters, if the speed is about 90 km/h. P When driving in city mode, this figure increases significantly - up to 9.6 liters.
What you need to know to reduce fuel consumption
Checking the air damper in the carburetor
Higher fuel consumption on a VAZ 2107 with a carburetor engine occurs if the air damper is not fully open. What is its correct position? Surely, an experienced driver knows that when the engine in the car is running, the choke in the carburetor must be in a vertical position. The choke handle must be fully extended towards you. Fuel consumption at idle speed in the VAZ 2107 can be reduced by specially setting the carburetor air damper to some extent. But such manipulation is not effective enough.
| Engine | Consumption (highway) | Consumption (city) | Consumption (mixed cycle) |
| 1.3 l 4-mech (gasoline) | 7.8 l/100 km | 11.5 l/100 km | 10.5 l/100 km |
| 1.4 l 5-mech (gasoline) | — | 9 l/100 km | — |
| 1.5 l 5-mech (gasoline) | 5.2 l/100 km | 8.9 l/100 km | 7 l/100 km |
| 1.6 l 5-mech (gasoline) | — | 8.5 l/100 km | — |
| 1.3 l 5-mech (gasoline) | 9.5 l/100 km | 12.5 l/100 km | 11 l/100 km |
The reasons for the high fuel consumption on VAZ 2107, the carburetor of which is in a faulty condition, speak for themselves. Young drivers do not always take the time to thoroughly check their car, and this can lead to negative consequences. Other factors of uneconomical fuel consumption may include:
- incorrect speedometer readings;
- malfunction of the device that measures the level of gasoline in the tank;
- driver's driving style.
Checking the fuel jet
Also, the reason for the high consumption of gasoline on a VAZ can be the fuel nozzle if its holder is not tightly enclosed. Because of this, during different engine operating modes, much more fuel enters the cylinders than required by the norm. To avoid this situation, check the tightness of the holder. You cannot tighten it too much, but even if it is not tightened completely, this will lead to the fact that the holder can randomly turn out while the machine engine is running. The reason for the overconsumption is that the diameter of the jets is too large or they are dirty.
Reasons not related to the carburetor
Engine malfunctions
Watch and listen to how your car's engine works. The presence of black or bluish smoke, rattling sounds are signs of a problem. In order to figure out what is wrong with the engine, it is worth measuring the compression in the engine cylinders. It is recommended to carry out this operation even if you are satisfied with the engine performance, but the fuel consumption is not. To do this you will need a device - a compression meter.
Compressometer
To obtain correct results, compression is measured on a warm engine. Unscrew all spark plugs. The contact of the central wire of the distributor is placed at a distance of 1-2 cm from the ground. The compression meter is pressed against the spark plug hole, and an assistant, fully pressing the gas pedal, turns the engine with the starter; 3-4 seconds is enough to get results. The operation is performed for each cylinder and the results are recorded. The permissible difference in pressure between the cylinders should not exceed 1 kg/cm². And the compression in each cylinder must be at least 9.7 kg/cm². If the readings are not within the normal range, this indicates an engine malfunction; it is necessary to understand the reasons, and repairs may be required. You should not rely on the efficiency of a faulty engine.
Violation of engine thermal conditions
Temperature sensor VAZ 2107
The operating temperature of the VAZ 2107 engine is 80-90 degrees. If the thermostat of the cooling system is constantly open, the liquid will move around a large cooling circle, and this in turn will lead to incomplete warming up of the engine, loss of power and increased fuel consumption. And the opposite situation occurs: when the engine overheats, the filling of the cylinders with the fuel mixture is disrupted, which leads to loss of power and increased fuel consumption.
Incorrect ignition timing setting
It is not for nothing that the manufacturer indicates the recommended ignition timing (IAF) in the car manual, since it ensures that the engine operates in optimal mode. Deviations of the OZ in one direction or another will lead to an increase in fuel consumption. For VAZ 2107, the SOP should be 5° for AI-92 gasoline. But it should be noted that the best way to set the ignition timing is on the road. The engine warms up to operating temperature. The car accelerates to 50 km/h, and in the last direct gear the gas pedal is sharply pressed. You should hear a detonation sound (tapping of fingers) that ends after a few seconds. If the detonation is prolonged, the ignition is too early; if there is no detonation, the ignition is too late. The SOP is adjusted by rotating the distributor.
Distributor VAZ 2107
Damaged or leaking connections in the fuel line
Fuel leak
Everything is simple here, if the tightness of the tank, hoses, loose clamps of various connections is broken, fuel may leak. Having placed the car in the inspection hole and started the engine, you must carefully inspect the entire length of the fuel line for leaks, including under the hood. For convenience, it is advisable to remove the air filter. If necessary, tighten the clamps, change the hoses or gaskets.
Incomplete release of the car wheels
A very common situation. Braking a wheel or wheels creates resistance to vehicle movement and, of course, increases fuel consumption. The probable reason for this situation is the lack of free play of the brake pedal, that is, the wheels are constantly in a state of slight braking. On the VAZ 2107 the free play is 3-5 mm. adjustable by moving the brake light switch.
Brake pedal VAZ 2107
A seized caliper piston could also be a possible cause. We pay attention to the brake discs; with constant contact, dark marks from the pads remain on them, and the car disc can become very hot. Check to see if the handbrake cable is overtightened.
Wheel bearings overtightened
If the hub nuts are tightened too much, additional resistance will be created to the vehicle's movement, which will affect fuel consumption.
Insufficient tire pressure, tire wear
Both on the VAZ 2107 carburetor and on other cars, high fuel consumption can be caused due to low tire pressure. It must be monitored once a week and before each long trip. Low tire pressure prevents the car from rolling. You can check the pressure with a pressure gauge.
Pressure gauge
Violation of wheel alignment angles
Incorrect angles of the front wheels of the VAZ 2107 not only create additional resistance to movement and increase consumption, but also lead to increased tire wear. Work on checking and setting the wheel angles of the car is carried out after each replacement or repair of suspension parts. This operation is also carried out after strong impacts due to careless driving.
Defective spark plugs
They lead to interruptions in engine operation, loss of power, and increase fuel consumption.
Malfunction of the vacuum ignition timing regulator
It will cause an incorrect shift in the ignition timing at different engine operating modes, this will lead to a loss of power, throttle response and, as a consequence, increased gasoline consumption.
Vacuum corrector VAZ 2107
Improper adjustment of the clutch drive, or its malfunction
With such a problem with the car, slippage occurs, difficulty accelerating the car, which inevitably leads to excessive gas, which will significantly increase the appetite of your vehicle.
Driving style
High fuel consumption of a VAZ 2107 carburetor may be a consequence of a driving style that can quite significantly affect fuel consumption. It’s one thing when you are calmly driving a car and quite another when you are trying to squeeze out of the engine everything that it is capable of using the gas pedal. An aggressive driving style increases fuel consumption.
Vehicle overload
Everything is logical here. More weight means more load means higher consumption.
Fuel quality
When refueling with low-quality fuel, you will have to press the gas pedal harder, and this will lead to an increase in fuel consumption. Low-quality fuel can have a detrimental effect on a car's engine, so be careful what you put into the tank.
Air filter dirty
Dirty air filter
The composition of the fuel mixture formed by the carburetor greatly depends on the amount of incoming air. When the air filter is dirty, the air flows worse, the engine loses power, we use the gas pedal more actively, and consumption increases.
Excessive fuel consumption on the injector
Owners of new modified VAZ cars with a single electronic control unit may encounter excessive consumption of gasoline at the injector. One of the reasons may be incorrect pressure in the fuel system. Recheck the car's engine management system; there may be a malfunction in its operation.
Also, one of the key problems with fuel consumption can be the failure of an injector or temperature or oxygen sensor. The fuel consumption of a Lada 2107 per 100 km with an injector (engine volume 1.5 liters) in the city in winter should be 9.5-13 liters, and in summer – 7.5-8.5 liters.
How does this system work?
In order to correctly determine in the future why you are using a lot of fuel, you need to know how the engine power system works. With this knowledge, you will already know how to reduce the fuel consumption of your UAZ.
After air enters the intake manifold, the volume will be measured by a certain sensor. All this information will then go to the ECU. The process will receive the task of injecting fuel through an injector, or, to be precise, through injectors. Everything that is released into the atmosphere is detected by the exhaust measurement sensor. The data obtained helps determine the actual fuel consumption.
Already with knowledge about the operation of the entire system, it is easier to find the exact reason for the unreasonably high consumption of gasoline.
What needs to be done to optimize fuel consumption
Try to drive without sudden braking or sudden acceleration. To ensure that the actual consumption of the VAZ 2107 does not exceed the norm, replace the use of mineral motor oil with synthetic one.
Check your vehicle regularly and replace the air filter if necessary.
Gasoline consumption 2107 per 100 km (and regardless of the kilometers traveled) at normal vehicle speed also depends on the quality of the fuel, so try to purchase it at large network gas stations. The saving of fuel and your financial resources depends on the technical condition of the car.
