The spark on VAZ 2109 (carburetor) has disappeared: possible malfunctions and their elimination

Failures in the ignition system of carburettor "Samar" - a phenomenon not uncommon and familiar to the majority of owners of these machines. But they happen, as always, at the most inopportune time. For a novice motorist, the search for a lost spark can take a few days or even weeks. For a person who has ever faced such a problem, it's a matter of one or two hours.

In this article, we'll figure out why the spark disappears and what it might be related to. We will consider the most probable causes of the malfunction, as well as the methods of their elimination using the example of the usual "nine".

At the preparatory stage

, можно предположить, что дело либо в системе питания, либо же в зажигании. In a situation where the VAZ 2109 (carburetor) does not start , we can assume that the matter is either in the power system or in the ignition. But, since we are talking about the latter, we will consider the problems associated with the supply of electric current to the candles.

, нам потребуется помощник и следующие инструменты: In order to determine that the spark on the VAZ 2109 (carburetor) is gone , we need an assistant and the following tools:

• A voltmeter (multimeter);
• Candle key;
• Pliers;
• crosshead screwdriver.

No spark on VAZ 2109 (carburetor): reasons

Before you start checking, it does not hurt to deal with the nodes that are involved in the process of sparking. These include:

• battery;
• Contact group of the ignition lock;
• Coil (transformer);
• switch;
• Trambler (distributor);
• Hall Sensor;
• high voltage wires;
• Candles.

Each of these elements can fail, which will inevitably lead to the rupture of the electrical circuit. , то исчезнуть она могла на любом из участков. If the spark to the VAZ 2109 (carburetor) really disappeared , then it could disappear on any of the sites. In order not to complicate the task with its search, the initial check should be performed in two stages: to determine if there is a current at the output from the ignition coil and whether there is a spark on the candles themselves.

Determine the plot

, проверку лучше начать на участке от аккумулятора до распределителя. If VAZ 2109 (carburettor) is not started at all, it is better to start the test on the area from the accumulator to the distributor. So we will understand if the battery, the contact group of the lock, the switch and the coil are working.

Checking order:

1. Raise the hood.
2. We disconnect the "cradle" of the central armored tube from the cap of the trambler.
3. In the "cradle" insert a candle, press it "skirt" to the valve cover (unpainted body area) and ask the assistant to start the starter. Do not hold the candle with your bare hands! You will receive an electric shock. Let and not deadly, but enough unpleasant. Keep the candle is best with dielectric pliers.
4. While the starter is working, we look at the interelectrode space. , естественно, не заведется. If there is no spark - VAZ 2109 , of course, will not start.

Now we have to install a faulty element in the battery-coil area. It is not difficult to do this.

Battery and ignition switch contact group

If you have determined that the spark on the VAZ 2109 (carburetor) has disappeared from the battery to the high voltage coil output, the fault may be a discharged battery and a faulty ignition lock. Let's check if electricity is supplied to the coil. To do this, using a voltmeter (multimeter), with the ignition on, we measure the voltage between the coil "+ B" terminal and the "ground". If it is, its value must be at least 11 V.

The absence of voltage indicates the failure of the contact group. The most common cause of malfunction is the oxidation or burning of leads. This problem is eliminated by stripping the contacts.

Coil

2109 выходит из строя достаточно редко, но проверить ее нужно обязательно. By itself, the ignition coil VAZ 2109 breaks down quite rarely, but it must be checked. This can be done with a multimeter, included in the ohmmeter mode. We attach one of its probe to the contact "+ B", and the second - to the terminal "K". These are the ends of the primary winding. The value of the resistance should be 0.4-0.5 ohms.

After that, check the secondary coil by attaching the instrument's probes to the "+ B" terminal and the high-voltage terminal. Here the resistance should be of the order of 4-5 kΩ. 2109 подлежит замене. At any other parameters, the ignition coil VAZ 2109 is subject to replacement.

Switch

With the switch, the situation is somewhat more complicated. The fact is that you can not check it out yourself. The best solution here is to replace the device with known good service.

Having determined that the spark on the VAZ 2109 (carburettor) was gone on the site to the distributor, you can immediately conclude that the reason for this is the switch. This is the most capricious device in the entire ignition system. It can "burn" because of the slightest voltage drop caused by a malfunction in the generator, faulty candles or high-voltage wires. That's why some experienced drivers "Samar" carry with them a spare device.

In search of a spark: candles

In the event that the voltage on the central high-voltage wire is still there, it is necessary to establish whether it is distributed and whether it is delivered to the candles. To do this, you need to determine whether the toggle and Hall sensor are working, whether high-voltage wires and spark plugs are broken. Let's start from the end.

Unscrew the first spark plug, put it on the valve cover, without disconnecting the high-voltage wire from it, but disconnecting from other candles, and ask the assistant to try to start the engine with a starter. Visually determine if a spark appears between the electrodes. If it is, twist the candle back and repeat the procedure for each cylinder. Remember the risk of being shocked, use pliers!

If there is no spark on the spark plugs VAZ 2109 (carburetor), try to replace them with new or known good. The situation has not changed? We continue the diagnosis.

High voltage wires

High-voltage wires, of course, can not all fail at the same time, but it is worth checking them out. The definition of efficiency is to measure the resistance of each of them. We disconnect wires one at a time and make measurements. At faulty conductors, including central ones, the resistance should be within 2.7-9 kOhm. Having identified the deviations from these indicators, replace the defective element.

The ignition distributor and the Hall sensor

As for the tumbler, the most frequent malfunction is the burning of contacts located inside the lid. In addition, the runner, "carrying" the voltage, can break down.

Unscrew the two screws and remove the cap from the switch. Pay attention to the status of contacts. If they are very burnt, deformed, poured - replace the cover. Look at the slider. It can also burn and deform. If necessary, replace it.

It is not superfluous to check the so-called "coal". This is the graphite contact of the high-voltage wire. If it is damaged, the voltage stops coming on the slider. As a result, all four candles are de-energized.

The Hall sensor is integrated in the distributor. Check it without removing it, you can also use a voltmeter. The stylus of the device must be connected to the green and black-and-white wiring coming from the sensor to the connector. Screw the flywheel with a screwdriver (in the window on the clutch housing), remove the voltmeter reading. They should range from 0.4 to 12 V. If this is the case, the sensor is OK. Well, if not, you need to replace the device.

Here, in principle, and all common faults, according to which the "nine" does not have a spark. VAZ 2109, as you can see, is not such a complicated car in this sense: a little time, a bit of theory, a simple tool, and your car is back in gear!