Why there is no spark in the car. Why is there no spark on the ignition candlelight? Checking high-voltage wires

The breakdown in the ignition system of the car, no matter how they were, are always unpleasant to the fact that each of them has a negative impact on the operation of the engine or leads to its full stop. And very often happens that the breakdown of the ignition system appears at the moment when the car must be used. I think this situation happened to many drivers. So, to prevent the emergency malfunction, you need to diagnose the car from time to time. I will tell about the problem that occurs when the engine starts and it sounds so "there is no spark from the ignition coil." After reading the article, you will find out what to do when the car does not start and at the same time the ignition coil sparks.

To determine what the problem is in the inductance coil, you can observe the behavior of the car. If the ignition coil sparks, then the machine behaves as follows:

• The intensity of the motor operation is dramatically reduced;
• Began to manifest problems with the start of the engine;
• A noticeable reduction in revolutions, and during idling in general, a work break;
• A pronounced increase in fuel consumption, which is not possible not to notice.

Each breakdown corresponds to some reason. When the ignition coil sparks or disappears the spark, then you can sin on the following reasons:

1. Current signals alleged for inductance coil do not come to it or a very weak signal;
2. Fuel does not pass into the carburetor;
3. The rubber does not receive a current that should come to him from inductance coil;
4. There is no spark, also it does not pass between the electrodes of the candle;
5. Fuel fluid does not fall into the combustion chamber;
6. The ignition distributor came to unsuitability or broke.

As a rule, the above problems are initial signs that the ignition coil sparks. Well, you need to carefully study and understand their nature.

Troubleshooting

Since the trouble touched you, you don't need to break your head to the service and pay it unclear what money for diagnostics and repair. You can repair your car yourself, while save a lot of money. Let's figure out why there is no spark from the ignition coil, and find out why she could have gone and how to solve such a problem.

First of all, it is necessary to carefully consider the coil for any mechanical damage, as well as various spots that can cause high voltage loss.

If there are contaminants, they need to be wiped with dry wind. Inspect all contacts and wires, they should not be wet and have any damage. After that, try moving high-voltage wires and start the car after that. If, after such manipulations, the machine has not started, then you need to carry out deeper diagnostics.

It is necessary to check the performance of the candles. To make sure that the candles should be done, you can do the following: you need two high-voltage wires from the distributor cover and arrange them near the car engine at a distance of seven millimeters. So, if a blue spark appears when starting the starter at this distance, it means that the system is good, and if its color is not blue, or there is no one at all, then it is necessary to repair it or change it to a new one.

The coil is checked as the candles as the same method. We take the wire going from it to the traver and bring it to the mass of the engine, after which we start the ignition of the car. If the sparks do not see the true cause of the autoform car stop. Next you need to check it with an ohmmeter. Thus, we check the presence of a chain break on the primary and secondary windings. If the gap is absent, then the melometer will show three ohms on the primary and seven thousand ohms on the secondary windings. In the case when the data is less, you should replace the ignition coil to the new one.

When diagnosing, it is also desirable to check each posting and contact. It is necessary to inspect the wires and their insulation, it is possible that the malfunction "falls" in these sections. You need to unravel the wires if they are confused, spreading them correctly. Using an ammeter, you need to check the availability of current in the chain and its strength. To do this, you need to connect the wires of the traver and run the ignition of the car.

In the case when the current is much smaller than the standard (it is specified for each car separately in TCP) - it means there is a gap in the coil that could appear as a result of a short circuit. Very often, the ignition coil sparks and thus breaks down when the ignition is turned on and when the engine is turned off. As a result, insulation begins on the wires, which cracks and crept over time. At the moment when the bare wires come into contact, a short circuit occurs.

So, when the true problem of breakdown is revealed, it needs to be remontable or to purchase a new one and replace. Repair are subject to those mechanisms that have minor cracks, scratches. Such damage can be removed by stripping or casing with a special substance. The coil is changing only to the same, with the same characteristics.

When connecting a new coil, it is necessary to be very attentive and neat. It is very important not to confuse the wires. Otherwise, the codes of the wire will be connected incorrectly, it will lead to their heating and short circuit.

To make premature breakdowns with your car, follow its work and its component mechanisms. Otherwise, you can pay for your negligence. Good luck with the car repair.

Video "Why disappeared spark from the ignition coil"

The record shows how to diagnose if the spark is disappeared.

As is known for the engine operation, two conditions are needed: the presence of fuel and sparks, for its ignition. In cases where the spark disappears, the launch of the power plant becomes impossible.

This refers to the situation when the spark disappears completely, but the sparks may not be on individual cylinders when the engine begins, an unstable, reduction of dynamics and amplification of the fuel consumption is observed.

Situations are different as a fault search paths.

9 reasons why there is no spark completely:

Spark plug

Candle electrodes can be covered with a raid, nagar appears, sometimes completely closing the gap between the electrodes, can occur the insulator breakdown, the burnout of the electrodes and the candle fails.

Ignition coil

In the ignition coil, there may be an intersless closure or a winding break.

Draver distributor

Contacts may be faulty, the Hall sensor, the slider or the presence of cracks in the lid may be faulty.

Egnition lock

In the ignition lock, the contact group may be faulty (burning contacts, the payment of the control of the contact switching of contacts.

High voltage wires

The problem in the wires can be expressed in their cracking, burning the inner veins and the test of external isolation.

Hall Sensor

In the contactless ignition system for the interruption of the spark, the Hall sensor is answered, the failures of which are often caused by the release of the bolts of its fastening, or by the breakdown of the sensor itself.

In the photo - Hall Sensor

Sensor of the crankshaft

If there are no sparks, then the wire of this cylinder is checked with a knowingly good candle and if the spark appeared, then the problem in the candle, which is before this in the cylinder. A new candle is installed and the engine starts, if the cylinder earned, then the problem was in the candle, if not, then you need to check the compression in this cylinder, as well as the clearance in the valves of this cylinder (shipped valve gaps) to identify the cause of the fault.

In the case when there is no spark when checking the obviously good candle, you need to check the status, the output to this cylinder in the lid of the traver (crack is possible).

In the injection engines, it is not recommended to check the spark plugs by contacting them with the mass, as it is possible to fail the ECU and other electronic systems. To check sparks on injector engines, there are special devices, which are recommended to use.

Since the spark plugs most often fail to have always a spare kit so that they can be quickly replaced in the way.

Summary

As we see, the presence of knowledge about the device and the operation of the ignition system, as well as the automotive tester will help any car owner to determine and find a fault without referring to the car service.

Like any other malfunction - the malfunction of the ignition system is unpleasant and late, but unlike others, it is able to deliver a lot of trouble when trying to diagnose, that is, finding out the cause of the breakdown and the inoperability of this system. Today we will talk about the situation when there is no spark and motor What does not want to start. In this article, I will tell you about the most likely the reasons for which the spark disappears, and how to find the cause at home.

The main signs of the ignition system malfunction is the unstable engine operation (), bad launch or complete absence of spark on the ignition candlelight. If the spark disappeared, it is necessary to accurately determine the reason for which it happened is to make it necessary to determine "with the circle of suspects".

The main reasons for which there may be no spark

1. First of all, make sure that there are no dust, dirt, oil spots on the elements of the ignition system, etc. If one of the above is present, take the rag and wipe everything as it should, or blow with compressed air, after which try again check the spark And start the motor.
2. Faulty spark plugs ("filled", burst the insulator, breakdown, etc.). Check the candles separately and make sure that the sparks are really not. If there is no spark on all candles, then the reason is most likely not in the candles, but in the coil or, for example, the starter. We read: and. If there is a spark, but weak or yellow, check the coil or BB-wire.
3. Problem in high-voltage wires (explosive wires). It can be a break, breaking for mass, bad contact. Make a detailed inspection of BB wires, make sure that there are no cracks and fractures on their surface. Stir the wires and try to start the engine if the motor becomes or at least try, most likely it is in the wires that the reason lies. In detail about
4. Fault ignition module or ignition coil. How to check the ignition coil .
5. The crankshaft sensor failed as check
6. The problem is in the switch, the rubber, the wrong gap, burned the contacts.
7. There is no contact on the massive wire or it is very bad.
8. Malfunctions ECU.

Ways to check sparks on candles:

1. Check for mass;
2. Using a multimeter;
3. Using a tester based on piezoelectric element.

Spark disappeared (injector)

As for the injectors, everything is more complicated here. Checking the spark in candles using the Mass method in injection engines is not always possible, in some cases it is extremely dangerous, there is a high probability of dealing with the ECU. Therefore, it is better to check the candles using other methods.

If the spark disappeared immediately on all cylinders, the reasons may be the following:

• Controller failed;
• Defective the entire ignition module;
• "Breaks through" the central wire.

The check must be performed alternately, starting with the fuses, then check the status of the contacts of BB wires and the masses.

The ignition system is one of the most important internal combustion in any engine. Almost all operational characteristics depend on its proper operation. And often the main reason why the car engine does not start, is that there is no spark from the ignition coil. To understand why it is it that is such a responsible element, it is necessary to understand the principle of operation of the entire system as a whole and familiarize themselves with its various types.

Device of the ignition system

In a modern car engine, the fuel mixture flames in the cylinders using an electric spark that appears between the spark plug electrodes. The gap between them is less than 1mm, however, to overcome this airspace, it is necessary for a very large stress, about 10 square meters. The ignition coil from the low voltage of the vehicle of the car just creates such high-voltage pulses.

What are the ignition systems

Ignition systems that use coils in their work are divided into two groups: contact and non-contact.

1. Contact Systems (classic vase models). Here, the distribution of the electric current entering the spark plug is performed using a moving contact ("Runner"), which is installed in the dispenser housing.
2. Contactless systems. It also creates high-voltage pulses, and they distribute them a special contactless runner and switch along the cylinders. Such systems are installed on carburetor models of front-wheelwater vases, as well as Tavria. On engines equipped with an injection system, the spark distribution is engaged in the engine control system (all injection models of vases), and the coils themselves are performed either as a single block (one by one to each cylinder), or in the form of individual modules (installed directly on candles).

Characteristic signs

On bad job, the ignition system usually indicate the following phenomena:

• difficulty when starting the engine;
• increase fuel consumption;
• unstable idling;
• weak traction and shortage of power, dips in the engine work, bad pickup;
• the appearance of black nagar on candles;
• periodic shutdown of one of the cylinders.

Diagnostics and troubleshooting

It should be remembered that deviations in the normal operation of the engine are almost always caused by only two groups of reasons: malfunctions in the system or ignition system. Therefore, it is necessary to move to the diagnosis of ignition operation only after the explicit elimination of the causes associated with the supply of fuel.

Troubleshooting should be seen only after the elimination of all other probable reasons. For this purpose, the following steps are performed:

The main reason why scooter does not start, this is a malfunction of the ignition system. The main sign of such a malfunction is a weak spark on a scooter or its absence at all. In the article you will learn about the possible breakdowns of ignition, diagnosis, as well as repair methods.

What is the ignition system

1. battery
2. starter
3. tok Generator
4. switch
5. coil
6. lock
7. candle
8. wiring.

Although all these elements have different sizes, the cost and complexity of the device, their importance in good operation of motorcycles is almost equivalent. The malfunction of only one of the above elements listed, leads to a failure of the entire scooter.

Each of these devices has its possible malfunctions. Let's discuss each device in order to repair.

Spark plug

The most common breakdown in the ignition system (including why there is no spark on the scooter) is a candle fault. Causes are absolutely different: Nagar due to poor fuel quality (or due to oil); overheat; Depleted or enriched fuel-air mixture and others.

Candle should be clean, without a special car, brick colors

It is possible to estimate its condition visually by twisting from the cylinder. Candle working color - brick. But the white, black shows the problems in her work. The best solution to the problem is a replacement for a new one. If there is no such possibility, then clean it with a brush, rag or roll on the gas burner.

Spark check is carried out in the following order:

• Candle is twisted from the cylinder along with the tip.
• The body of the candle is leaning towards metal "mass".
• The engine rotates a paw or starter, while the candles should slip sparks between the candles electrodes.

To check the candle, lean it to the metal case of the scooter

Remember! If when replacing the spark appeared, it means the ignition system is in order and should move to the diagnosis of other parts of the scooter.

Ignition coil

If the candle is replaced by a new, but scooter (moped) will not start anyway, diagnose the coil. The coil is a device with two windings - primary and secondary. Visually is a keg with two contacts and the outgoing high-voltage wire.

Coil scooter

The role of the coil is to increase the incoming voltage hundreds of times. The primary winding has two contacts as outputs. The secondary winding is concluded between the plus contact and the end of the high-voltage wire. Violation of the integrity of one of the windings leads to non-fulfillment of the main task and, as a result, the absence of spark.

Moped coil

Diagnose the coil is better to start with a candle cap. Inside the cap is an interference resistor, which also fails. You can check it by a multimeter, in resistance measurement mode. You need to connect proves to the outlet cap - one to the landing place of the candle, the other to the end for the armor gun. Resistance is considered normal - within 5 com. In case of inconsistencies, replace the cap.

On modern ignition systems, the coil is made by monolith with wire and tip. In this case, you need to test everything together. One multimeter probe is connected to a cap, another probe - alternately to two coil contacts. We determine the resistance on the primary and secondary windings of the coil.

Remember! The impedance of the primary winding must be in the range of 0.1 to 0.4 ohms; Secondary winding -6.35 to 9.7 com. The value is the average for most scooters, the production of China. Therefore, for each model, they must be clarified in the directory.

If the instrument readings do not match the reference values, change the coil or the candle cap, if removed.

See also: How to start a scooter after winter?

Electric wiring

Another useful principle - if you do not know why the spark of the scooter disappeared, then make the wiring check. The reason that the spark disappeared, the banal - the wire break, the oxidation of contacts, connections, or rupture of the terminals. Such a problem is characteristic of any scooter - at least China, even ITALY.

After removing the decorative plastic of the plastic, you can completely inspect the state of the wiring. Pay attention to the mass "Mass" from the coil on the body. Wire contacts are often oxidized, and this leads to a decrease in voltage in the ignition system. The same problem exists in the contacts of the wire connecting the engine and the moped frame.

Carefully inspect the terminals of the contacts of the sensors and switch. Wires may not contact or have a weak contact, as a result, the current is lost. To eliminate, clean each terminal from oxidation and ingress, crimp the contacts and make sure that everyone is firmly held in their nests.

It looks like a wiring on a scooter without plastic sheat

Another unlikely problem (but quite possible) is the break of the wire "mass" from the ignition lock. The wire serves to stop the engine operation, and transfer the lock to the off state. In the event of a breaking of the wire and closure to the frame, even with a rotator, the spark disappears.

Switch

The switch is a complex electronic device that combine several elements in itself. The main elements are a condenser and thyristor. Thyristor - an electronic device for interrupting the current going on the ignition coil. The reduction of voltage allows a thyristor to open the current path for the capacitor.

Scooter switch conceptual circuit diagram.