No spark on trimmer plug

Checking the contactless distributor

If the “six” is equipped with a contactless ignition system, then checking such elements as candles, a coil, and explosive wires is performed in the same way as with a contact one. The differences are in checking the switch and the Hall sensor installed instead of the contacts.

Hall sensor diagnostics

No spark

The complete absence of a spark is manifested by the inability to start the engine. There can be many reasons for this phenomenon:

  • wet or broken spark plugs;
  • damaged explosive wires;
  • break in the coil;
  • problems in the distributor;
  • breakdown of the Hall sensor or switch (on a car with a contactless distributor).

Appointment of a spark on a VAZ 2106, the reasons for its absence and troubleshooting

The functioning of the VAZ 2106 power unit is inextricably linked with the formation of a spark, which is influenced by almost all elements of the ignition system. The appearance of malfunctions in the system is reflected in the form of problems with the engine: tripping, jerking, dips, floating revolutions, etc. occur. Therefore, at the first symptoms, you need to find and eliminate the cause of the malfunction, which every owner of Zhiguli can do with his own hands.

Checking the removed sensor

During the test, the voltage at the output of the sensor is determined. The serviceability of the element removed from the machine is determined according to the presented diagram, supplying voltage within 8-14 V.

spark, trimmer, plug

By placing a screwdriver in the gap of the sensor, the voltage should vary within 0.3-4 V. If the distributor was removed completely, then by turning its shaft, we measure the voltage in the same way.

Checking the sensor without removing

The performance of the Hall sensor can be assessed without dismantling the part from the car using the diagram below.

The essence of the check comes down to connecting a voltmeter to the corresponding contacts on the sensor connector. After that, turn on the ignition and turn the crankshaft with a special key. The presence of a voltage at the output, which corresponds to the above values, will indicate the health of the element.

No spark on the VAZ 2106

Sparking is an important process that ensures the starting and stable operation of the power unit, for which the ignition system is responsible. The latter can be contact or non-contact, but the essence of its work remains the same. to ensure the formation and distribution of a spark to the desired cylinder at a certain moment in time. If this does not happen, the engine may either not start at all or work intermittently. Therefore, it is worth dwelling in more detail on what the spark should be and what the reasons for its absence may be.

Battery check

Since the battery is the power source when starting the car, it is with checking this device that it is worth starting diagnostics. Malfunctions with the battery appear when you try to start the engine. At this moment, the control lamps on the instrument panel go out. The reason may be either poor contact on the terminals themselves, or simply a weak battery charge. Therefore, the condition of the terminals should be checked and, if necessary, cleaned, tighten the mount. To prevent oxidation in the future, it is recommended to cover the contacts with a graphite dab. If the battery is discharged, then it is charged using an appropriate device.

Why do I need ignition adjustment

In some cases, when the engine does not start, ignition adjustment will be required. Of course, first you need to check the condition of the candle and the high-voltage cable with a cap.

It is necessary to adjust the ignition on a two-stroke engine in order to ensure timely ignition of the fuel in the engine combustion chamber. Below is a diagram from which you can understand the principle of operation of the internal combustion engine.

The spark in the spark plug should appear at the moment the fuel is compressed by the piston, when it does not even reach the top dead center (TDC). When the piston passes TDC, the fuel mixture ignites, as a result of which the piston goes down under the action of the explosion energy.

Therefore, if, for some reason (mainly due to the displacement of the flywheel on the shaft relative to its initial position), the fuel ignites before the piston passes TDC, then it goes back, and the crankshaft rotates in the opposite direction. This movement could damage the starter assembly, cut the starter cord, etc. In this case, early ignition of the fuel occurs.

There may also be a late ignition on the trim: the piston, after compression of the fuel that has not ignited, goes down, and at this moment a spark appears. In this case, the engine will either not start, or it will significantly lose power and it will be bad to gain speed.

But such problems with early or late ignition on two-stroke internal combustion engines are quite rare, since the flywheel with magnets is already installed in the correct position, which is perfectly synchronized with the movement of the piston. In addition, the flywheel is secured to the shaft with a key and nut. Therefore, incorrect installation of the part is excluded.

Basically, ignition adjustment is about setting the correct gap between the magneto and the flywheel.

Trimmer ignition setting

Gasoline trimmers use both two-stroke internal combustion engines (ICEs) and four-stroke ones. But the ignition system in them is no different from each other, therefore, the repair and adjustment of this fuel ignition system will be the same for different types of internal combustion engines.

How to check the health of a magneto

Magneto is the main part in the engine ignition system and is a coil with primary and secondary windings located around the core. Often, due to a malfunction of the magneto, the spark on the spark plug disappears and the fuel does not ignite. To check the coil, you will need to use a tester, and follow these steps.

  • On the tester, after switching to the resistance measurement mode, you need to set 200 ohms. In this way, the primary winding will be checked.
  • Connect one electrode of the tester to coil ground and the other to the lead coming out of the magneto. Normally, the resistance should be between 0.4 and 2 ohms.
  • To check the secondary winding, you will need to set the device switch to 20 ohms. Further, one probe of the device is inserted into the candle cap, and the second is connected to the “mass”. Normally, resistance indicators should be in the range of 4-6 kΩ and above (depending on the model).
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When the circuit is open, the device will show infinity, and when closed. 0 (zero).

If you do not have a tester, then you can use the following method, being very careful so that the electrode does not touch the cylinder, otherwise the coil will burn out.

  • Remove the cap from the candle. You do not need to unscrew the candle in order to maintain compression.
  • A nail without a cap must be inserted into the cap. The nail should be of such a diameter that it adheres well to the cap.
  • Tie the cap with the nail to the cylinder using a dielectric so that the gap between the electrode and the cylinder body is between 5.5 and 7 mm (but in no case touches the “mass”).
  • Using the starter, simulate the engine start several times. The ignition button must be on.
  • Observe if a spark appears and what color it has.

Normally, the spark should be strong, white or bluish in color. If the spark is weak, and its color is orange or yellow, this indicates a faulty magneto.

You should also consider the fact that sometimes cold magneto can give a good spark. But after heating, due to internal malfunctions, it ceases to produce current. As soon as the coil cools down, the trimmer starts up again and runs for a while until the magneto warms up again. This coil needs to be replaced.

Sometimes a spark plug can cause a similar heating problem even if the coil is OK, so both parts need to be checked.

How the trimmer ignition system works

The ignition system of a two-stroke internal combustion engine consists of 2 elements: a flywheel and a coil (magneto). The picture below shows how they look.

The flywheel has an impeller that acts as a fan to cool the engine. There are also permanent magnets on one side of the flywheel, shown by an arrow in the figure.

When the flywheel rotates, an electric current is generated in the coil, which serves to produce a spark on the spark plug. A spark appears when the magnets are directly below the magneto.

Ignition adjustment algorithm

Trimmer ignition is quite simple to adjust.

    Remove the engine cover from the engine by unscrewing all the bolts holding it. For example, on a Patriot (Patriot) PT 2540 lawn mower, to remove the cover, you will need to unscrew the air filter housing, and use a flat screwdriver to remove it from the latches. After that, the plastic case can be easily removed.

  • Using a screwdriver, unscrew the 2 screws (not completely unscrewed) holding the magneto.
  • Turn the handwheel so the magnets are at the top.
  • Further, in order to correctly set the best clearance between the flywheel and the coil, you can use a regular business card or calendar. If you do not have either one or the other at hand, then to set up the ignition, you can use a sheet of A4 paper by folding it 2 times (as a result, you will get a thickness of 4 sheets). This thickness will be sufficient to obtain the optimal clearance and adjust the ignition. Insert a business card or paper between the spool and the magnets.
  • The magnetic field will pull the coil towards the flywheel. While holding the magneto in this position with your fingers, tighten the bolts that hold it.
  • Remove the business card. After that, the ignition on the trimmer will be adjusted.
  • No spark injector

    It is recommended to use a spark gap in order to understand at what stage there is no spark on the candles (not from the distributor, not from the coil, or already directly from the candle itself).
    In the absence of a spark in all cylinders at the same time, there may be several culprits:

    • controller;
    • the whole module;
    • coil or center wire.

    If there is no spark from the ignition coil, then the cause can be hidden in many places. First of all, you need to check the high-voltage armored wire, which should be in perfect condition and without breaking the insulation. Otherwise, the wire must be replaced.

    No spark, candle check

    If the problem persists, then we check the spark plugs. The contacts of the candles must be clean. The fact that there is no spark may be the fault of contaminated spark plug contacts. It is best to replace the candles, but you can also clean the contacts. But before changing the candles, check if the discharge reaches the candles themselves. To do this, remove the spark plug wire and bring it to the car body at a distance of 0.5 cm. Rotate the starter several times and see if there is a spark between the wire and the body. The spark should be white with a light blue tint. If it is absent or present, but with a different shade, we can say that the candles are in order, and the problem is precisely in the heart of the car’s ignition system. the coil.

    No spark

    When the spark has disappeared, you, of course, will never start the car, and in such a situation, first of all, you need to check the ignition system.

    The ignition system of a car plays a key role in its operation. If, with many other malfunctions, the car can be delivered to the service station on its own, then in case of problems with ignition it is unlikely that it will be possible to start the engine.

    The main reasons why there is no spark

    • problem with spark plugs (flooded or out of order);
    • breakdown of high-voltage wires or loss of contact;
    • the reason is in the crankshaft sensor (check with a multimeter is required);
    • malfunction in the ignition module;
    • failure of the ignition coil;
    • the problem is in the switch;
    • distributor malfunction (burned contacts, loss of clearance);
    • poor contact of the ground wire;
    • failure or malfunction of the ECU.

    How to test a spark

    There are several ways to check the spark on a candle:

    • Check for weight (the plug body is pressed against the engine and the spark is analyzed when the starter rotates).
    • Checking the candle with a multimeter (you can determine the breakdown of the candle).
    • Diagnostics with a tester based on a piezoelectric element (the test principle is similar to the breakdown to ground method, the presence of a spark is determined and is mainly used on injection vehicles).

    How to check the spark on the ignition coil

    To see if the coil is working at all, remove the wire from the distributor-breaker that goes from the coil. The same test is carried out with it as with the wires of the candles, namely, they bring the wire at a distance of 0.5 cm and turn the starter. Now, regardless of the result, we can accurately talk about the cause of the breakdown.

    Checking the ignition coil

    In the first case, you need to check the contacts in the distributor-breaker for oxidation, insulation failure, and also check the serviceability of the rotor. If there is no spark due to it, then the rotor must be replaced.

    Checking the ignition coil also consists in inspecting the integrity of the windings for physical damage, as well as burnt points, which indicate a short circuit in the coil. In these cases, the coil must either be repaired or replaced.

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    If, after the checks, you understand that there is a spark in the car, but it does not start, then the ignition switch may need to be replaced.

    Why is there no spark on spark plugs?

    There can be several reasons for the absence of a spark on the spark plugs. The most common culprits for malfunctions are:

    • Accumulator battery;
    • High voltage wires;
    • Ignition coil;
    • Distributor;
    • Malfunctions in the low voltage circuit.

    Also, in the absence of a spark, special attention should be paid to checking the quality of the contacts and electrical connections of the elements of the ignition system. You can check the status of the contacts by simply rubbing them with your hand.

    Carefully inspect the wires and blocks of the ignition system. if you find dirt, oil or water on them, they must be wiped with a dry cloth. After that, try to start the engine, it is possible that this time it will start.

    Checking the ignition coil

    To check the ignition coil, pull the central wire from the coil from the distributor-breaker cover.

    When rotating the starter, make sure there is a spark from the wire, by analogy with spark plug wires.

    • The appearance of a spark indicates that the ignition coil is working properly. In this case, the malfunction should be looked for in the breaker-distributor.
    • If there is no spark from the wire, then the cause of the malfunction is hidden either in the ignition coil or in the low voltage circuit.

    If there is a malfunction in the ignition coil, it should be replaced with a new one.

    Troubleshooting the ignition system

    Malfunctions of the car’s ignition system are unpleasant in that any of them are always accompanied by serious interruptions in the operation of the engine or its complete stop. The main symptom of a malfunctioning ignition system is the complete absence or “weak” spark between the spark plug electrodes. What if there is no spark, and where to look for it? Read about this and not only in our material.

    Most often, the spark disappears exactly at the moment when you need to go somewhere. In order not to push the car to the nearest car service, it is important to understand what the operation of the ignition system depends on, then the search for the missing spark will not cause any particular difficulties.

    At the end of this article, see the video instructions for finding a spark in the ignition system of VAZ cars.

    And below we propose to get acquainted with the algorithm for finding the missing spark in the car ignition system.

    Battery check

    A clear sign of a problem with the battery is a dull and quiet horn signal. Also, in case of problems with the battery during the rotation of the starter, as a rule, the control lamps on the instrument panel go out. In this case, the reason for the absence of a spark may be poor contact at the terminals or a low battery.

    • If the terminals are oxidized, they must be stripped and tightened securely. In addition, you can use graphite grease, which reliably protects the contacts from oxidation in the future.
    • If the battery is discharged, it must be charged with a charger.

    For information on how to properly charge a car battery and maintain it, read our instructions for charging the battery.

    Checking high voltage wires

    Next, it is worth inspecting the high voltage wires: they must have a neat, not “tousled” appearance, without insulation violations, otherwise they will have to be replaced. If the wires are in order, then you can start looking for a spark.

    We recommend starting the search for a spark with spark plug wires. To do this, you need to remove the tip of the spark plug wire from the spark plug and bring it to the “ground” (the nearest metal unpainted part of the body or engine) at a distance of 5-8 mm, after which, you need to turn on the starter for a few seconds.

    The rotation of the starter should be accompanied by an uninterrupted bright spark of white with a slight blue tint. If there is no spark, check the ignition coil. A purple, red or yellow spark indicates a malfunction in the ignition system.

    It is also worth noting that the spark plugs themselves rarely fail all at the same time. If there is a “spark” in the spark plug wires, you can check any spark plug by unscrewing it from the cylinder head and putting the spark plug wire on it. With the metal part of the spark plug, touch the “mass” of the car, and while rotating the starter, make sure that there is or is not a spark on the spark plug electrodes.

    It is necessary to change the spark plugs within the time frame established by the maintenance regulations for your car (usually every 15-25 thousand km).

    You can learn more about the marking and glow plug number of spark plugs from our material at this link.

    Checking the ignition switch-distributor

    If you suspect a malfunction of the breaker-distributor, you must carefully inspect its cover from the inside.

    • If the cap is ok, then just flush it with gasoline.,
    • If cracked, the cover will need to be replaced.

    The center carbon contact of the breaker is checked for “hang-up” by moving it easily with your finger.

    The rotor insulation of the interrupter-distributor is checked for breakdown as follows:

    • Place the central high-voltage wire with a gap of 5-8 mm from the rotor electrode,
    • After that, close-open the breaker contacts by hand (while the ignition must be on).

    The appearance of sparks in the gap indicates a malfunction of the rotor, which will need to be replaced.

    Checking the low voltage circuit

    A 12V test lamp up to 3W can be used to test the low voltage circuit. The lamp is connected on one side to the low voltage terminal of the breaker, and on the other to the vehicle ground.

    After that, you need to manually close the contacts of the breaker-distributor and turn on the ignition. With a good low voltage circuit, the control lamp should glow when the contacts open, and when they close, go out.

    If the lamp does not light up when the contacts are opened, it means that the malfunction is hidden either in the low voltage wires or in the primary winding of the ignition coil.

    The constant glow of the lamp, in any position of the contacts, indicates one of three reasons for the malfunction:

    • Strong oxidation of the breaker contacts;
    • Broken wiring leading from the breaker terminal to the lever;
    • Broken wiring connecting the moving disc of the breaker to the housing.

    If the cause of the malfunction turned out to be in the oxidized contacts, then they must be cleaned, after which the gap should be adjusted.

    Any malfunction in the car is unpleasant for any car owner. Malfunctions with the ignition system are accompanied by problems in the engine. A clear sign that there is a malfunction in the ignition system is the absence of a spark or it is too weak. This often occurs in some VAZ models: 2106, 2109, 2114, and also 2110. And this, as a rule, happens at the most inopportune moment.

    Reasons for the absence of a spark in a VAZ car

    Checking the ignition coil

    To diagnose the coil, you need to get the main wire from the distributor cover. Next, we try to crank the starter in order to see a spark from the wire.

    • A spark has formed. this indicates the serviceability of the coil. So the problem lies in the interrupter.
    • In the absence of a spark, the fault must be sought in the ignition coil.
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    If it has been determined that the problem lies with the ignition coil, then it will have to be replaced. In “middle-aged” VAZ cars, especially 2109, 2106, 2114, 2110, this phenomenon is by no means rare.

    Checking the battery

    Situations where there is a problem with the battery charge is indicated by the fact that the sound of the horn has become barely audible. Also, on the dashboard, at the time of the car factory, the bulbs go out. Therefore, the reason why there is no spark is problem contacts on the battery terminals or its weak charge.

    • If trouble arose due to oxidation of one of the terminals, you just need to clean it and tighten it tightly. Also, graphite grease is used to protect the contacts.
    • If, nevertheless, the problem turns out to be a low battery charge, you can simply charge it and monitor the charge level in the future.

    Spark disappeared on engines with an injector

    If we consider an engine with an injector, then everything is much more complicated. It is not always possible to check for the presence of a spark in the spark plugs using the “ground” method, and in certain cases it is very dangerous, you can “kill” the entire electronics control unit. Therefore, in a system with an injector, it is better to check in some other way.

    Why the spark may be missing?

    The list of situations in which there may be no spark in car candles is very large, anything can affect this. Let’s try to highlight the most common reasons for the models 2109, 2114, 2110, 2106 of the VAZ automobile concern:

    • weak battery charge;
    • the problem is in the BB wires;
    • there are problems with the ignition coil;
    • low voltage circuit problems;
    • problems with the ignition distributor.

    Also, attention should be paid to the quality of the contacts and electrical assemblies. The contacts, of course, can be checked quite easily by twitching them slightly with your fingers. In addition, it is advisable to inspect all elements of the ignition system. If there is dirt, oil, water on them, they must be wiped off immediately with a dry cloth. After that you can try to start the car.

    Checking the low voltage circuit

    To diagnose such a circuit, you can use a 12 volt test lamp with a power of up to three watts. This light must be turned on with one contact to the car ground, the other to the low voltage terminal. After manipulating the connection manually, the breaker contacts are closed and the ignition is turned on. If the circuit is working properly, then when the contacts are closed, the light goes out, when the contacts are open, it is on. When this does not happen, you need to start looking for a problem in the coil winding or in the cables.

    If the lamp is on constantly, then this indicates one of the types of malfunctions:

    • Breaker contacts are highly oxidized.
    • The wire leading from the lever to the breaker terminal is broken.
    • The wire that connects the housing to the movable disc is broken.

    The oxidized wires must be cleaned, after which the system will work. In any other case, more in-depth intervention is needed.

    How to check the spark on the ignition coil

    In most cases, to check for the presence of a spark, it is required to connect to the high-voltage output of the test spark plug coil, apply an ignition pulse to the low-voltage input. In some coils of older versions, the coil can be checked autonomously (without a car). For this:

    With this method, the spark may be slightly noticeable, especially in the case of electronic ignition coils.

    How to check the spark on a spark plug

    There are several methods for controlling the presence of a spark on a candle:

    Attention! During this operation, you should take precautions not to touch the metal body of the candle. The voltage of the high-voltage spark pulse is more than 10 kilovolts. This could result in electric shock. High-voltage damage is especially dangerous for people with problems of the cardiovascular system.

    Visual inspection is best done in a slightly darkened room; an assistant is required for this.

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    Video. why there is no spark on VAZ injection cars (Kalina, 2109, 2110, 2114, 2115):

    Thus, if a spark breaks through the end of the wire at a distance of 4 mm to the metal part of the engine, then the impulse voltage is more than 20 kilovolts.

    A special spark indicator can be purchased.

    Warning! With this method of control, you need to be even more careful, since the electric current can flow through the assistant who is holding the high-voltage wire. In this case, special rubber gloves may not prevent injury: their standard breakdown value is only 6.3 kilovolts. It is better to use a bulky dry rag as an additional insulator.

    Using a pilot gas discharge lamp. Such a probe can be made independently using a gas-discharge lamp and a high-resistance resistor (of the order of several megaohms). Various probe options can be found on Aliexpress. SEE OPTIONS.

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    How to check a spark on an injection engine. what are the features

    Most modern injection engines are equipped with individual or prefabricated ignition coils (multiple ignition coils in one housing). This design simplifies assembly, repair and maintenance.

    Along with this, it (design) complicates the process of controlling the presence of a spark. To carry out this operation, it is required to dismantle the individual (combined) ignition coil, reconnect it to the power connector, put the spark plug on the high-voltage output, connect it to the engine body, and attempt to start. In some models of motors and coils, this operation is structurally difficult.

    Video. how to check the spark on the injector spark plug using special indicators:

    A selection of various inexpensive automotive ignition testers can be viewed HERE.

    What to do if there is no ignition spark

    Lack of an ignition spark is one of the probable problems of starting gasoline engines.

    Almost all repairs related to an internal combustion engine begin with a spark check.

    No spark. possible causes

    The main reasons for the absence of an ignition spark can be divided into the following groups:

    If a spark is missing, when analyzing a complex malfunction, it is necessary to consistently monitor all possible causes in order to accurately establish the main source.

    Why there may be a weak spark on the spark plugs

    A weak spark on the spark plugs is possible for the following reasons:

    Most car enthusiasts believe that the main reason for the loss of a spark is a malfunction of the ignition coil. Experience shows that this is far from the case. On this occasion, there is a well-known driver’s saying: “It was not the reel,…. sat in the cockpit. In order not to be in the role of a careless driver, all possible reasons for the absence of a spark should be investigated.

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    Video. there is no spark on the VAZ 2110, troubleshooting: