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

Failures in the carburetor ignition system "Samar" -phenomenon is common and familiar to most owners of these machines. But they happen, as always, at the most inopportune time. For a novice car enthusiast, 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 will understand whythe spark disappears and with what it can be connected. We will consider the most probable causes of the malfunction, as well as the methods for eliminating them using the usual "nine" example.

At the preparatory stage

In a situation where does not start VAZ 2109 (carburetor), 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.

In order to determine that there was a spark on VAZ 2109 (carburetor), we need an assistant and the following tools:

• a voltmeter (multimeter);
• candle key;
• pliers;
• crosshead screwdriver.

No spark on VAZ 2109 (carburetor): the causes

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

• battery;
• contact group of the ignition lock;
• coil (transformer);
• switch;
• the 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. If indeed there was a spark on VAZ 2109 (carburetor), then she could disappear on any of the sites. In order not to complicate the task with its search, the initial check should be carried out 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

If at all does not start VAZ 2109 (carburetor), it is better to start the test on the site from the battery 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 cover of the trambler.
3. In the "cradle" we insert a candle, we press it with a "skirt"to the valve cover (unpainted section of the body) 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. Hold the candle is best with dielectric pliers.
4. During the operation of the starter, we look at the interelectrode space. If there no spark - VAZ 2109, of course, will not start.

Now we have to install the 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 is gone(carburettor) in the area from the battery to the high-voltage output of the coil, the fault can be both 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 exit frombuilding of the contact group. The most common cause of malfunction is oxidation or burning of leads. This problem is eliminated by stripping the contacts.

Coil

By her own ignition coil VAZ 2109 breaks down quite infrequently, butyou must check it. This can be done using 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 resistance should be 0.4-0.5 Ohm.

After that, check the secondary coil by connecting the instrument's styli to the "+ B" terminal and the high-voltage terminal. Here the resistance should be of the order of 4-5 kΩ. For any other indicators 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 yourself. The best solution here is to replace the device with known good service.

Having determined that the spark on the VAZ 2109 was gone(carburetor) in the area 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

If the voltage at the centralthere is still a high-voltage wire, it is necessary to establish whether it is distributed and whether it comes to the candles. To do this, you need to determine whether the toggle and Hall sensor are working, whether the high-voltage wires and working candles are broken. Let's start from the end.

Unscrew the first spark plug, put it on thevalve cover without disconnecting the high voltage lead 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 individual 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 allsimultaneously fail, but it is still worth checking them out. Determination of efficiency is the measurement of 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 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 tension, 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 out, deformed, showered - 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 ceases to flow to 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 instrument 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 everything is the case, the sensor is OK. Well, if not, you need to replace the device.

Here, in principle, and all the commonfaults, according to which the "nine" do 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 order!