Egnition lock
Removing the “seven” lock
The ignition system on the domestic seven includes two main components - a coil and a module. The lock, in turn, consists of several parts - the switching mechanism itself, as well as the contact circuit. Each of these components is independent in its design, so if one of them breaks, it can be replaced without completely changing the lock. As for repairs, the VAZ 2107 ignition module can be repaired at home if you have all the necessary tools and an idea of how this procedure is performed.
On a carburetor or injector, the functionality of the lock can be determined using a special tester - a multimeter. To check contact ignition, the multimeter probes should be connected to the outputs on the lock one by one, and the output should correspond to one or another position of the key. If the contact group is operational, the multimeter will display a resistance that tends to zero. If the resulting indicator is different, this indicates the need to repair the contact group or replace it. In some cases, such parameters may be due to oxidation or burnt contacts, which can be corrected without replacing the group.
What are the advantages of VAZ 2107 injection models?
• The VAZ 2107 injection engine consumes less fuel. At the same time, it is more powerful than a carburetor engine with the same volume. This is achieved through the optimal formation of the qualitative and quantitative composition of the fuel mixture. Accordingly, the efficiency of an injection engine is higher than that of a carburetor.
• Thanks to electronic speed control, the engine runs more reliably at idle, stalls less when starting, and starts well at low ambient temperatures.
• Compared to a carburetor engine, an injection engine does not require frequent adjustments to the ignition and fuel supply systems.
• The air-fuel mixture that enters the cylinders has the most favorable composition. And the existing catalyst controls the minimum amount of harmful exhaust gases. This plays a big role in preserving the environment and taking care of health.
• There is no need to manually adjust the mechanism, since this is done by the hydraulic chain tensioner and hydraulic valve clearance compensators. They also guarantee less noise (noise insulation) when the engine is running.
• Torque graphics are “smooth”, a larger rpm range allows high torque to be achieved.
WORTH NOTICE! On an engine with an injection system, it is possible to install gas-cylinder equipment not only of the 2nd, but also of the 4th generation. This is a more modern and attractive option, since the installation of the 4th generation of gas equipment provides greater savings and reduces the occurrence of “pops” in the engine to zero.
Ignition coil
Black short circuit for the "seven"
Any type of ignition, including dual-circuit ignition on a VAZ 2107, cannot work normally without a coil. The main task of this component is to convert low voltage to high voltage. It is the high voltage in the ignition system that will make it possible to break through the air gap between the spark plug and produce the spark necessary to ignite the combustible mixture in the cylinders. To ensure normal ignition performance of an injector equipped with nozzles or a carburetor, a B117A coil is used on the contact system.
As for the location, the VAZ ignition coil is located in the engine compartment on the left mudguard. It is fixed with two special pins. As for the device itself, it is a regular transformer with a magnetic core. This element consists of an external magnetic conductor, as well as a core, and is equipped with two windings.
The cylindrical body of the device itself is made of durable steel, which protects it from damage. The entire structure is closed from above using a sealed lid made of a special insulating material (the author of the video about the adjustment is the channel Behind the Steel Gates).
Malfunctions of VAZ 2107 injection engines
Malfunctions of the VAZ 2107 injection engine make themselves felt by the manifestation of the following problems:
• Engine operation becomes unstable and unstable; • Fuel consumption increases significantly; • The quantitative content of carbon dioxide in the exhaust increases; • When you press the gas pedal, dips appear; • Engine power decreases, the engine stops “pulling”.
Troubleshooting the injection system requires special equipment. For example, to determine the correct operation of sensors and engine ECUs and determine error codes, special software with a computer, a tester, is required. For this reason, diagnostics and repair of the “seven” injector should be carried out at professionally equipped service stations. A common cause of injector malfunctions is clogged injectors themselves.
Display Guide
So, we figured out where the VAZ module and ignition coil are located and what functions they perform, now let’s talk about setting them up. If the system torque is set incorrectly, this will cause increased gasoline consumption, as well as detonation of the power unit (the “fingers” will start knocking). In general, the operation of the motor will be unstable.
To set up the ignition of a VAZ 2107, you need to perform several steps, all of them are described in detail below:
- First, you need to correctly adjust the gap that exists between the interrupter device. To do this, you should dismantle its cover in advance and clean the contact surface. At the same stage, it is necessary to check the connection of the contacts - the elements must come into contact over the entire surface, and not just in certain areas. If the contacts are poorly connected, you should try to bend them slightly. You can also try sharpening the plane a little.
- Having done this, we move on to an important stage. You need to turn the crankshaft until the contacts open as much as possible. Using a feeler gauge, you need to increase the gap to approximately 0.45 mm. It should be noted that during this, the probe between the contacts should move with low resistance.
- The crankshaft rotates until the “ignition timing” mark marked on the pulley itself. Having done this, a voltmeter should be connected to the terminal of the interrupting mechanism; if it is not there, a regular test light can be used. We are talking directly about the breaker terminal, which is connected to the coil. Using a 13mm wrench, you need to slightly loosen the nut securing the breaker to the BC.
- After these steps, you need to turn the key in the lock, but do not start the engine; at the same time, the breaker body must be turned counterclockwise. When you notice that the light has gone out, you need to start turning the housing in a different direction until the light comes on again. If the control light is on, this indicates that the moment of spark transmission through the high-voltage wires has been set. Once the torque has been established, the breaker fixing nut should be tightened until it stops.
As for checking, this is easy to do. When the car is traveling at a speed of 40 km/h, you need to press the gas so that the vehicle quickly gains power. During rapid acceleration, a brief detonation should occur until the car can accelerate to 60 km/h. If this is so, then the moment was set correctly and for some time you can forget about this procedure.
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Signs of breakdown
When the ignition is turned on, the engine ECU malfunction indicator light comes on, and after the engine is started, it should go out. A burning warning light is the first sign of problems with the ignition system. Other prerequisites for diagnosing the ignition module are “floating” engine speed and problems with starting. The cause of such failures may be faulty high-voltage wires or spark plugs, so you need to make sure they are working before you start diagnosing the ignition of the VAZ 2107 (injector). Often, cylinder misfires occur due to compression problems or damage to the intake manifold gasket. This must be taken into account when searching for the causes of engine failure.
Diagnostics and replacement of the ignition coil on the seven
The ignition of the air-fuel mixture in the cylinders is carried out by a spark plug, which requires a high voltage of about 11-20 kV to operate. The current conversion in the ignition system of the VAZ2107 car occurs in a special cylindrical transformer. This device is installed in the engine compartment on the mudguard on the left side and is attached to it with two studs.
The type of coil used on the VAZ2107 is B-117A, it was specially designed for classic cars with a contact ignition system. This device consists of the following parts:
- core;
- external magnetic circuit;
- primary and secondary winding.
The core is a set of plates made of steel of special electrical grades. This part is the basis for coils isolated from each other. The coil has a metal body filled with transformer oil. The cover, made of dielectric, has two contacts for powering the primary coil and one terminal for the high-voltage wire.
General tips for connecting high-voltage wires.
Checking high-voltage wires. To check the wires, you will need a multimeter tester. Check the resistance of the wires - it should be no more than 20 KOhms (in practice, the longest wire of cylinder 1 has a resistance of up to 10 KOhms). If the wire resistance is more than 20 Kom, it must be replaced. Carefully inspect the wires for chafing on parts of the motor or other wires. In case of significant abrasion, replace the wire. In case of minor abrasion, it is possible to lay the wire so that it does not rub and fix it in this position.
Laying wires. Do not try to connect the wires in a bundle. Disassemble the wiring harnesses, release the wires from the plastic holders. Connect the high-voltage leads to the corresponding cylinder spark plugs. Lay the wires so that they do not rub against each other, engine parts, or hoses. Avoid sharp bends and tension on the wires. After connecting all the wires, secure them into the bundle with special comb holders included in the delivery kit.
The procedure for connecting I/O wires to a VAZ carburetor (2108, 2109, 21099)
The central wire from the distributor cover always goes to the ignition coil (bobbin).
The outlet of the distributor cover, which faces towards the front of the car, is connected to the first cylinder.
The outlet of the distributor cap, looking down, is connected to the third cylinder.
The outlet of the distributor cap, looking rearward, is connected to the fourth cylinder.
The outlet of the distributor cap, looking up, is connected to the second cylinder.
The procedure for connecting high-voltage wires to a VAZ Classic, Niva with a carburetor and distributor.
Central wire from the ignition coil (bobbin)
1 cylinder - above the vacuum corrector. Next, clockwise, the order is 1-3-4-2.
Injection VAZ produced before 2004 with an old-style ignition module (4-pin low-voltage connector)
Actually, on the module body it is already indicated which cylinder the pins correspond to - but we duplicated them in red in case the module gets completely dirty, and you might not be able to see it in the photo.
Injection VAZ produced after 2004 with a new ignition coil (3-pin low-voltage connector)
As with the old-style ignition modules, the new coils are also marked with pins corresponding to the cylinders. But the connection order is different from the order on the old-style ignition module. Be careful.
Source
PROCEDURE FOR CHECKING IGNITION SYSTEM DEVICES
The main reason for the failure of this device is a wire break in the primary or secondary winding. This ignition system device is checked using a multimeter set to resistance measurement mode. The operation can be performed either directly on the car or after it has been dismantled.
Open the hood of the VAZ2107 car and disconnect the battery. The coil installed on the mudguard in the engine compartment is disconnected from the on-board network and cleaned of contaminants. At the first stage, we check the resistance in the primary winding; its value should be in the range from 3.0 to 3.5 Ohms. We perform the same operation for the secondary winding, acceptable values are from 7.4 to 9.2 kOhm.
Causes of clogging of the VAZ 2107 injector
Poor quality gasoline mainly causes problems with the injection system. This gasoline contains a high amount of heavy paraffins. They leave deposits on the walls of the fuel system, clogging it and making it difficult to supply fuel. When producing high-quality gasoline, special additives (detergents) are added that destroy such deposits. Low-quality gasoline contains a very high amount of paraffins that detergents do not have time to cope with their deposits.
REPLACING THE DEVICE
If the indicators do not correspond to the above values, the ignition coil is considered faulty. Such a device must be replaced with a working one, which can be purchased at almost any spare parts store. When purchasing the device, you must inspect it and check the availability of documents: technical passport and certificate.
Removing the ignition coil on a VAZ2107 car is carried out with the battery disconnected. Use a wrench to unscrew the nuts on the contact and mounting studs. The faulty device is removed. A spare part is installed in its place and secured and connected. Now you can connect the battery and start the engine.
Sources
- 7vaz.ru/remont/diagnostika-i-zamena-katushki-zazhiganiya.html
- autocentrum.ru/brands/lada/17209-obzor-sistemy-zazhiganiya-vaz-2107-katushki-i-drugih-elementov-posobie-po-vystavleniyu.html
- drive2.ru/l/487397562748240344/
- 21074.ru/elektrooborudovanie/kak-proverit-modul-zazhiganija-vaz-2107-inzhektor-multimetrom/
- bumper.guru/klassicheskie-modeli-vaz/elektrooborudovanie/zazhiganie/zazhiganie-2107/katushka-zazhiganiya-vaz-2107.html
Wire selection
Many people face a problem when replacing wires, and it’s hard to say which company to choose, which one is better, but new wires are always better than old ones, so you need to evaluate your capabilities strictly by the thickness of your pocket. The price range for high-voltage wires is quite large.
The most popular brands of high-voltage wires are SLON, AvtoVAZ, TESLA, these brands have proven themselves well and are in good demand.
Connection diagram for high voltage wires
Connecting new or removed old wires must be done strictly according to a specific scheme. Otherwise, the spark will not coincide with the compression stroke in the cylinder block.
In other words, when the fuel mixture is ready to ignite in the cylinder, a spark is required to ignite it. If the connection is incorrect, the spark will not appear at the required moment and ignition will not occur, which will make starting the engine impossible.
Scheme
The order and counting of cylinders in VAZ engines starts from the timing belt drive, from left to right, that is, the first cylinder will be at the timing belt, and the 4th at the oil filler neck.
Most often, the cylinder number is indicated on the ignition module, but there are cases when there are no designations on the module, then it is necessary to connect the cylinders according to the diagram shown below.
- The first cylinder is connected to the lower left contact on the MH;
- The second cylinder is connected to the upper left contact on the MH;
- The third cylinder is connected to the upper right contact on the MH;
- The fourth cylinder is connected to the lower right contact on the MH;
