Wiring diagram for VAZ 2107 injector: color with description

VAZ 21074 carburetor - model review

The “seventh” series of VAZ left the factory assembly line in 1982. The “Seven” was a “luxury” version of the previous VAZ 2105 model, which, in turn, was developed on the basis of the Fiat 124. That is, we can say that the roots of the domestic automotive industry go back to the Italian auto industry.

In the spring of 2020, the analytical agency Autostat found that the most popular sedan in Russia is the VAZ 2107 and all its modifications. At the time of the study, more than 1.75 million Russians used a car.

One of the most popular AvtoVAZ models is 21074

Where are the body number and engine number located?

Any car produced at the Volzhsky Automobile Plant must receive several identification numbers. So, the most important of them are the body number and engine number.

The engine number is a kind of passport for a specific model, because you can use it to identify the car and trace the entire history of the “four” from the very beginning. The engine number on the VAZ 21074 is stamped on the left wall of the cylinder block, immediately under the distributor.

Data is stamped on metal using template numbers.

All other vehicle data sheets can be found on the aluminum plate located on the bottom shelf of the air intake box. The following parameters are selected here:

• model name;
• body number (individual for each VAZ);
• power unit model;
• information on vehicle weight;
• machine version (equipment);
• marking of main spare parts.

A plate with basic data on the car is attached to all VAZ models on the air supply box

Unfortunately, or maybe fortunately, this car has been discontinued and can only be purchased on the secondary market. There are no special packages. This car is quite popular for tuning; car owners understand that their cars are very far from ideal and make them either retro or racing style. My car was bought for 45,000 rubles for the same amount and was sold. But no matter what it was, only positive memories remained in my memory

Pavel12

https://www.ssolovey.ru/pages/vaz_21074_otzyvy_vladelcev.html

Video: general overview of the car

Installation

An important issue when replacing an engine is installation. It is recommended to perform this operation only in a specialized and certified car service center. Only experienced craftsmen, using modern equipment, are guaranteed to be able to correctly install a new engine and debug it. This is especially true for injection models.

If the installation is carried out without attachments, and all the necessary parts are installed from an old engine, the service will cost from 7-9 thousand . With a mounted one, engine installation will increase in price to 10-11 thousand rubles .

Vehicle specifications

The VAZ 21074 is made in a sedan body - both in the opinion of the plant’s designers and in the opinion of car enthusiasts, a sedan is the most convenient “box” for both personal use and for cargo transportation.

It is worth noting that the carrying capacity of the machine indicated in the technical documents (1430 kg) is underestimated. Surely you have more than once seen a “four” loaded to maximum, on which neighbors were transporting things or bags of potatoes. Until now, in any market, a fairly large number of sellers use the VAZ 21074 to transport goods. Do not forget that initially the model was not created for the transportation of goods in principle!

Table: parameters of VAZ 21074 carburetor

The resource of a carburetor engine is relatively long - from 150 to 200 thousand kilometers. On the VAZ 21074, repairing the power unit and carburetor mechanism is not considered a costly procedure, since all components and parts are made according to the most simplified schemes.

The carburetor mechanism in the VAZ 21074 is two-chamber, emulsion

Description of the salon

By modern standards, the exterior of the VAZ 21074 is outdated.

It’s difficult to talk about the appearance, because in fact the car is very outdated and looks like a rarity in the city. But in any case, from a certain angle, we can say that it doesn’t seem to be scary. In a word, classicism.

Andreyka

https://www.avtodor.su/articles-avtomobil-vaz-21074

Due to the fact that the entire line of the VAZ 2107 family (and the VAZ 21074 is no exception here) is rear-wheel drive, the engine is located in front, which made it possible to significantly expand the interior space: both in the ceiling and in the legs for the driver and front row passenger.

Compared to previous versions of the VAZ, the 21074 is more spacious inside

The interior trim is made of special plastic alloys that do not give glare and are easy to maintain. The floor of the car is covered with polypropylene mats. The body pillars and the inner parts of the doors are covered with medium-hard plastic and covered with caprovelor on top. The seats in most cars are upholstered in durable, wear-resistant fabric - velutine.

It must also be said that the VAZ 21074 uses a large number of “auxiliary” materials for interior decoration - various types of mastics, bitumen gaskets, felt pads and lines. All these materials come into contact with the upholstery in one way or another (doors, bottom, seats) and protect the interior from excessive noise from the outside. Bitumen and mastic are used primarily in vehicle underbody equipment, while soft and textile materials are used in upholstery and trim. This equipment not only helps make a person’s stay in the cabin more comfortable, but also solves a number of other problems:

• increased cabin sound insulation;
• minimizing vibration waves while driving;
• protection of metal from rust;
• increasing the thermal insulation of the cabin.

High-quality plastic and durable velutine fabric are used to equip the interior.

Dashboard

VAZ 21074 is considered a more comfortable version of the VAZ 2107. Comfort is achieved in various ways, including making it easier to drive. Thus, the instrument panel allows the driver to see current data on both the ride and the condition of his “iron horse” at any time.

On the VAZ 21074, the dashboard is made up of many elements, each of which shows the operation of a particular unit in the car. The panel is embedded in the dashboard of the car on the driver's side. All elements are located under plastic glass: on the one hand, they are clearly visible, on the other, the devices will be protected from possible mechanical shocks.

The instrument panel is protected from external influences by a plastic visor and durable glass

The instrument panel of the VAZ 21074 contains the following elements:

1. A speedometer is a special mechanism that shows the current speed. The scale is numbered in divisions from 0 to 180, where each division is the speed in kilometers per hour.
2. Tachometer - located to the left of the speedometer and is used so that the driver can see the crankshaft rotation speed per minute.
3. ECON fuel consumption gauge.
4. Engine temperature indicator - for the VAZ 21074, the engine operating temperature is set in the range of 91–95 degrees. If the pointer needle “crawls” into the red zone of the device, the power unit is working at the limit of its capabilities.
5. Fuel quantity indicator in the gas tank.
6. Accumulator charging. If the battery light comes on, it is necessary to provide additional charging to the battery (the battery is discharged).

In addition, there are additional lights and indicators on the instrument panel that remain turned off during normal operation (for example, engine oil level, engine problems, high beam, etc.). The lights turn on only when there is a problem with a particular system or when a certain option is enabled.

Illuminated additional elements indicate errors, problems or the inclusion of an option

Gear shift diagram

The gearbox on the VAZ 21074 operates according to the international standard. That is, the first four gears are switched on by analogy with the writing of the Russian letter “I”: up, down, up, down, and the fifth - to the right and forward. Reverse speed is switched to the right and backward.

Video: universal speed shifting

Some questions among drivers are controversial. For example, when is it better to change gears in a car:

don’t pay attention to the rpm, look at the speed, the first one starts, the second one is up to 40, the third is at least up to 80 (the consumption will be high, better than 60), then the fourth, if the hill is ahead and you have 60 and the fourth, then it’s better to go to a lower speed select only when switching (at the moment the clutch pedal is released), so that it is smooth, without jerking, and in general the marks are already made on the speedometer) when you need to switch

Gear shifting on the VAZ 21074 is carried out in the same way as on modern cars according to the international standard for manual transmission

The VAZ 21074 car is still actively used by car enthusiasts today. Despite the outdated design and limited functionality (compared to modern standards), the machine is very reliable and durable. In addition, the simplicity of the design allows you to fix all breakdowns yourself and not spend money on expensive service services.

Differences in work

Advantages

So, what are the benefits received by the car owner whose car has injection installed:

• There is less chance of stalling when starting from a standstill - the electronics react more flexibly to the operation of the gas pedal, allowing you to move off more confidently from idle;

The engine compartment wiring harness of the VAZ 2107-20 has different connectors

• Easy engine starting - there is no need to manually operate the choke knob;
• Reduced warm-up time for a cold engine - the electronic system optimizes the minimum stable speed. You can start moving after starting, without fear of jerks and dips typical of a carburetor;
• Reduce routine maintenance of electrical equipment . In particular, there is no need to constantly adjust the gap in the breaker contacts;

For reference: Other domestic car factories also modernized electrical equipment, in particular the ignition system - see the publication on the UAZ 31514 wiring diagram.

• Reduced adjustment work on the carburetor - electronics can reduce fuel consumption and make engine operation more environmentally friendly.

In the video you can see the stable start of the VAZ 2107 injection engine.

Flaws

The injection system also has some flaws, in particular:

• Without a diagnostic tool, it is quite difficult to identify a malfunction in the engine management system;
• Standard wiring 2107 does not allow troubleshooting using a warning lamp;
• The factory instructions most often instruct you to contact a service center for diagnostics. However, the price of such a service is not always justified for the car owner.

In the photo - diagnostics of the oxygen sensor of the VAZ 2107

Although the installation of injection on the “seven” helped the model survive on the assembly line until 2012, nevertheless, modern trends forced AvtoVAZ to stop producing rear-engine versions. We hope that this article, as well as high-resolution electrical and wiring diagrams, will be useful for car owners of VAZ 2107s that remain in service.