The ignition coil of the VAZ 2112 engine is the main part of the car’s ignition system, which serves as a conventional low-voltage direct current converter, which comes from the battery or directly from the electric generator into high-voltage voltage for further supplying an electrical impulse to the spark plugs.
In today's article we will learn how to check the ignition module on an injection VAZ-2112 8 valve with our own hands, and also consider step-by-step instructions for replacing this car unit.
Purpose and design of the ignition coil of the VAZ 2112
To create a pulse (spark) between the electrodes of the spark plug of the VAZ 2112 carburetor engine, a “standard”, classic or case coil was used for a non-contact ignition system (BSI), which is a high-voltage pulse step-up transformer with an open or closed magnetic circuit. Its use on “two-wheelers” continued until it was replaced by a two-spark (four-terminal) ignition coil (module) for 8-valve injection engines and an individual coil for power units with 16 valves.
New ignition coil for VAZ 2112
Diagnostics of malfunctions of the VAZ 2112 housing ignition coil for BSZ, nomenclature number 3122.3705 or 8352.12, consists of measuring the resistance of its primary and secondary windings and comparing the obtained data with table values. The resistance of the primary winding of coil 3122.3705 should be 0.43 (±0.04) Ohm, the secondary winding - 4.08 (±0.4) kOhm. The resistance of the coil 8352.12 is respectively 0.42 (±0.05) Ohm and 5 (±1) kOhm. The insulation resistance to ground must be at least 50 MOhm.
If measurement results differ by more than tolerance values, the coil must be replaced. You need the VAZ 2112 ignition coil, with its relatively low price, it is quite reliable and its replacement is rather an exception to the rule.
Ignition module VAZ 2112
The ignition module (four-terminal coil) provides simultaneous sparking in two cylinders (the first and fourth or the second and third). It needs to be checked for serviceability if there is no spark on one or more spark plugs. It is checked using a stand that simulates various engine operating modes and an oscilloscope. Checking “in the field” consists of connecting a known working spark plug one by one to the tips of high-voltage wires, grounding it to ground and, turning the crankshaft with the starter, visually detecting spark formation on the electrodes of the “test” spark plug.
Let's get inside the car
Tuning VAZ 21124 includes changes to the internal world of the car. Additional devices are installed in the VAZ interior and the old ones are improved; sports seats, a steering wheel and airbags are installed. For a chic look, the VAZ 21124 lacks door trim, new armrests, interior handles and wooden pockets.
In the world of car tuning design, there is a wide range of PVC fabrics for ceiling upholstery, many options for door cards and leatherettes, which differ in color and design.
beautiful in the new VAZ 21124 , especially in yellow, red or blue. Don't forget about podiums for speakers and columns; they come in different diameters, colors and models. If desired, corner trims, door inserts, sun visors, decorative floor coverings can be installed in the interior; it all depends only on your imagination.
Tuning VAZ 21124 photo
Tuning the VAZ 21124 changes most of the car’s system, so this car can rightfully be classified as a high-speed car. It’s so nice when on the road, your car easily bypasses other cars, moves easily and does not make noise when accelerating quickly. Installing a turbine on a VAZ 21124 , a high-quality braking system, steering, improved suspension for maneuverability and easy handling - all this is called car chip tuning.
Version of the module on the 8-valve VAZ-2112
Two 8-valve engines of different volumes were installed on the twelve-wheeler - 1.5 and 1.6 liters. The ignition modules for these engines are different. The one and a half liter engine has a module with article number 2112-3705010, and the 1600 cc engine is equipped with a module 2111-3705010. A module for a 1.5 liter engine costs about 1500-2100, and the second one is 500 rubles cheaper.
Which is better?
SOATE devices manufactured in Stary Oskol have proven themselves to be the most reliable ignition modules.
Module structure
It consists of two ignition coils and two high-voltage switch switches. The coils are designed to create high-voltage pulses.
In essence, it is a simple transformer that has two windings: a primary winding, with an induction voltage of approximately five hundred Volts, and a secondary winding, with an inductive voltage of at least twenty kiloVolts. Everything is placed in one housing with one connector for signal wires and four for high-voltage.
Structure of the ignition coil module of the VAZ 2112
The operation of the ignition module is based on the “idle spark principle”. The module is capable of distributing a spark in pairs: to the first and fourth, second and third cylinders when transmitting pulses from the electronic control unit.
Finally we start chip tuning
We have talked about chip tuning many times, for example, when we looked at the chip tuning of the Chevrolet Niva. The concept of chip tuning VAZ 21124 implies flashing the original engine with camshafts. The easiest way to deal with this issue is to contact an experienced specialist so as not to harm your car and get what you wanted, however, after studying the necessary information, you can do chip tuning yourself.
Now let’s try to briefly describe how to do tuning of a VAZ 21124 with your own hands using Stolnikov 8.9 shafts with phase 280 or Nuzhdinov 8.85 shafts. The car's system is equipped with a 4-2-1 direct-flow exhaust, a receiver and a 54-56 mm damper, which increases engine volume. The operation of the engine will be more efficient if the piston is replaced with a lightweight Prior one. Changes are being made to the system in order to reduce fuel consumption and increase engine power.
Malfunctions of ignition modules on VAZ-2112
The process of removing the ignition coil on a VAZ 2112
If the VAZ 2112 engine starts running intermittently or does not start at all, the cause of the problem may be the ignition module.
Characteristic symptoms of a malfunction of the ignition module of the VAZ 2110:
- insufficient engine power,
- when accelerating the car jerks,
- either 1 and 4 or 2 and 3 do not work at the same time,
- the engine does not start.
It should be noted that on the VAZ-2112 one of the coils is responsible for the operation of cylinders 1 and 4, the second - for cylinders 2 and 3. If one ignition coil fails inside the monolithic block, two cylinders stop working at once.
To eliminate all other components of the ignition system, make sure that the spark plugs are in working order.
Installation of a new ignition module for VAZ 2112
To do this, unscrew them and check the spark on each of the spark plugs by cranking the engine with the starter and placing the spark plug with the high-voltage wire on the head so that the body (threaded part) of the spark plug touches the engine mass.
If there is no spark or it is weak, replace the spark plug with one that is known to work. If this does not lead to anything, check the high-voltage wires.
Thus, we will exclude spark plugs, caps and high-voltage wires from the list of non-working elements. Next we will check the ignition module.
Meet the model
With a new engine, the unit was given the name VAZ 21124, this car actively fights against the ecology of the external environment. In addition to everything, when the car starts, the traction at the bottom has become noticeable, and the engine now runs calmer, without sudden jumps. We often hear questions from owners of 16-valve engines: “What needs to be done so that the valves do not bend in the piston?” In the VAZ 21124, this problem will not exist; in the bottom of the piston there are holes and sports shafts that control the rise of the piston, and don’t let the knocking and noise of the VAZ 21124 engine scare you, this is its normal environment.
Upgrading a car is now the most important goal for every modern and self-respecting driver. Tuning the VAZ 21124 includes changes to both the internal and external characteristics of the car. Styling the appearance of a car includes installing a body kit on the bumper fenders, sills, hoods and doors, this gives your car an individuality, a sporty look, and also improves its aerodynamic performance. To create a sports car VAZ 21124 , it is impossible to do without replacing body elements with plastic material. Plastic parts reduce the weight of the car, making it easy to drive on the road. The final feature of a sports car is the installation of alloy wheels and sports tires.
Removing and replacing the ignition coil
In order to replace the module (ignition coil) on a VAZ 2112, you must perform the following steps:
- Before starting work, be sure to disconnect the battery by disconnecting the “-” terminal from it. (How to de-energize a battery.
- Then, approaching the ignition coil, disconnect one single high-voltage wire from its central part.
- Next, use a wrench to remove the two side nuts that hold the ends of the wires in place on the side of the coil.
- Next, when the nuts are unscrewed, remove both side wires from the coil.
- And to complete the operation, unscrew the two side nuts securing the ignition coil itself to the bracket.
- And then remove the coil from the car engine.
Tuning "yellow iron"
The VAZ 21124 includes “yellow iron” tuning, in which stabilizers (for agility), reinforcements and braces (for road stability) are installed. However, be careful with counterfeits of these parts; at worst, they will damage the car, and at best, you will be throwing away a lot of money.
Feel like a real circuit racing driver with the VAZ 21124 hatchback . All you need is to install additional parts: a nameplate (symbols) on the handle of the car, neon lighting under the bottom of the car, an air intake on the hood and roof. The installation of front and rear bumpers with an aerodynamic body kit will add power to the car.
Do-it-yourself installation of the VAZ 2112 ignition module
- Having picked up the new coil, first install it in its place by tightening the two nuts that secure it.
- Then place two wires on the sides of the coil and secure them with retaining nuts.
- When installing two side wires, pay attention to the markings that are marked on the sides of the ignition coil (see photo below). So this marking indicates which terminal of the coil should be connected to this or that wire. The blue wire must be connected to the “B” marking, and the red wire must be connected to the “K” marking!
- Then place the high-voltage wire on the central part of the ignition coil.
- And then install the negative terminal on the battery.
On old ignition coils, as a rule, instead of the letters “B” and “K”, the designations “-” and “+” are used, which means the same thing, but only in signs. The blue wire must be connected to the “-” sign, and the red wire must be connected to the “+” sign!
