Service:

Spark plugs are the most important element in the smooth operation of the engine, igniting the air-fuel mixture in the combustion chamber of the car engine. In most cases, the number of spark plugs corresponds to the number of cylinders in the car engine, but there are exceptions.

For any problems with candles, the entire motor system of the car begins to suffer, even if there is a malfunction in one of several candles. The period for replacing candles can be found in the service card of the car, but if any problems appear with the engine, it is essential to replace the candles. Masters of the company Mosavtoshina strongly recommends replacing candles in Chery car Tiggo every 15,000 km even with original spark plugs.

The main task of spark plugs is the ability to endure the highest loads. You should always remember a simple rule: more expensive spark plugs will last much longer than cheap counterparts. In case of malfunctions in the motor system of the car, in no case should they be postponed for their replacement. Often a problem with candles leads to a "Check Engine" error.

Timely replacement spark plugs in Chery Tiggo significantly increase fuel economy, saving money.

Do not replace the spark plugs yourself unless you are sure that the spark plug can be safely removed from the cylinder. At the location of our service there is special equipment that allows you to effectively replace in a short time.

After replacing the spark plugs on a Chery car, our specialist will determine the main indicators of the state of the internal combustion engine: the quality of the fuel used, problems with the engine, and the efficiency of the fuel supply.

The cost of replacing candles on a Chery Tiggo car in SVAO

The cost of the candle replacement service is displayed for one piece and does not include the cost of Supplies. Estimated replacement time for 1 candle is 6 minutes.

15.11.2016

For all its apparent simplicity, the maintenance of candles on each car has its own characteristics. And in addition to the type of candles themselves, the required gap on them, there is also the concept of a constructive difference in car engines, which entails a different approach to the procedure for unscrewing candles. We suggest that you familiarize yourself with how to properly maintain candles on a Chery Tiggo crossover.

According to the manufacturer's recommendations, ordinary candles on Tigo must be changed every 20,000 kilometers. If you have iridium ones, then in this case the frequency of their replacement can be tripled. However, this does not mean that you can drive calmly for 20 or 60 thousand kilometers and be sure that everything is still in order with the candles: they need to be checked periodically, and it’s better to do it yourself, elevating this procedure to the category of ordinary, at least monthly or even weekly. Well, if the deadline has already come, then no matter what your candles seem to be normal to you, feel free to buy new ones and start replacing.

The process of checking candles in any case is associated with their extraction. Therefore, having learned how to check the candles, you will also know how to replace them. So, on Chery Tiggo we do this operation using the key at 10, candle key with a rubber bushing (which holds the candles in the key), as well as a special round probe or a set of flat probes (for measuring the gap in the candle).

Now comes the coldest period of the year - winter. And although checking candles is a mandatory event for year-round operation, especially in winter, faulty candles cause the most trouble. Protect yourself from them - change the candles in time!

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One of the service centers encountered the following problem: one of the customers in the car engine constantly failed the same candle. Approximately every three weeks, the client returned to the mechanic with a complaint about the uneven operation of the engine on Idling and reduced power. Each time, the mechanic found in the same cylinder a spark plug with an almost completely burnt out central electrode. And every time, it was enough to replace this candle, and the engine started to work normally. After three requests from the client with the same complaint, the foreman service center advised the mechanic to look into whether loosening of the plug in the threaded seat could be the cause of this malfunction.

The auto mechanic admitted that every time he changed a spark plug, he found that it was not tightly screwed into the threaded socket. A speck of dirt on the threads of the conical plug seat could also be the cause of the spark plug overheating (much of the heat from the top of the plug is directed to the cylinder head).

After the spark plug was tightened properly, the engine started to run normally and there were no more problems with it. After returning the car to the customer, the mechanic admitted to the foreman that the constantly failing spark plug was in such an awkward place that it was difficult to tighten it to the specified torque, and this problem was his fault, and not because of the engine.

In order not to overtighten the candle, set the ratchet of the key to two notches

To avoid over tightening the spark plug when a torque wrench is not available, do so with a ratchet wrench. To do this, after screwing in the candle, pull it by hand to an angle corresponding to two clicks of the ratchet mechanism of the key. Even the strongest worker will not be able to tighten the spark plug in this case.

Install spark plugs of the brand preferred by the car manufacturer.

At one of the non-branded service centers, a technician replaced the spark plugs in a Pontiac car with new ones that matched the old ones in size, heat rating, and thread length, and differed only in that they were trademark champion. When the client came to pay the invoice for the work performed, he asked what brand of spare parts were used for maintenance his car. Upon hearing that Champion brand spark plugs were installed in his car, the customer did not sign the check he had already written. He stated that he owned a thousand shares of General Motors, that he had two General Motors cars, and that only General Motors would suit him. The manager of the service center had to order the technician to replace the candles with new ones - the AC brand, since the candles of this brand were originally in the car. Although spark plugs from different manufacturers are generally suitable for almost any engine, many customers prefer to have spark plugs of the brand preferred by the vehicle manufacturer in their car engines.

Chery Tiggo 2005. The main causes of engine tripping

Ignition timing incorrectly set.
- There is a leak of air in the vacuum brake boost system.
- Faulty spark plugs. It is worth noting that this problem is the most common, since the spark plugs need to be changed every 20,000 kilometers after the car has passed (this figure depends on the recommendations given by the designers to each car).
- A breakdown of the high-voltage wire that fits the spark plug.
- Faulty installed capacitor.
- Violation of the tightness of the system in the area of ​​\u200b\u200bthe intake manifold.
- The appearance of burnout of one of the piston, valve.
- Breakdown piston rings, their deformation and wear also lead to this problem.
- Incorrect adjustment of the gas distribution valves.
- High degree of rocker wear.
- A breakdown of the installed cylinder head gasket.
- Any kind of wear (hardening, breakdown, destruction) of valve stem seals.
- Improper adjustment of the carburetor can also cause cylinder malfunction.
- The condition of the installed distributor shaft, turntable bearing.
- clogging air filter.
- Loss of tightness of the membrane of the vacuum ignition timing regulator.
- The use of unsuitable spark plugs (not only the dimensions, but also other parameters of this element are taken into account) for this engine.

Troit engine

Engine tripping is a definition that should be understood as a failure in operation of the internal combustion engine when one or more cylinders do not work partially or completely. In other words, the combustion process fuel-air mixture in individual cylinders is broken, which causes unstable job motor at idle, under load and in transient conditions.

Engine tripping manifests itself in the form of increased vibrations of the power unit, the engine noticeably loses power. Misfires may be observed, which are accompanied by strong pops in the exhaust system. The motor can triple both occasionally and constantly, only at idle or under load, cold, hot, etc. Next, we intend to answer the question of what engine tripping is, and also consider the main reasons why the engine starts to triple.

Why does the motor start to thrive

Engine tripping is a violation of the combustion of the mixture in the cylinders, which is accompanied by a clear increase in vibration. Please note that the appearance of ICE vibrations is not necessarily triple, as there are a number of other reasons why the engine vibrates a lot.

The main malfunctions, as a result of which the engine troit:

Submission of insufficient or excess fuel into the cylinder;
-supply of insufficient or excess air;
- malfunctions of the ignition system, early or late ignition;
- wear or breakdown of the motor, which is accompanied by a decrease in compression;

In other words, the engine starts to triple as a result of an inappropriate composition of the fuel-air mixture, untimely ignition of the mixture or the inability to ignite the charge, as well as a violation of the conditions normal combustion mixture as a result of mechanical wear or breakdowns of the engine itself.
Based on these data, it is possible to narrow the scope of the search and the number of systems for diagnosis. Checking should start with fuel system and injector, then the intake air supply and the ignition system are checked. In some cases, engine tripping may also be the result of a failure of one of the ECM sensors.

Troit engine: ignition of the fuel-air mixture is broken

Most common cause, which causes the engine to triple, is late or early ignition, as well as a weak spark of the spark plug. At the initial stage, unscrew the spark plugs for a detailed inspection. If damage to the insulator or other defects is noticeable, then the candle should be replaced.

In the case of a damaged insulator, the damage site is clearly visible, since this area turns black. You should also pay attention to the condition of the central electrode and evaluate the gap of the side electrode.
Next, you need to check the spark plug wires. An indirect sign indicating this element is episodic motor tripping in conditions of high humidity (rain, dampness, etc.). After warming up and leaving the engine on operating temperature symptoms may disappear completely.

You should start by inspecting the cap of the candle and the high-voltage wire itself. These elements have rubber insulation, which tends to dry out and crack over time, as a result of which the wire begins to pierce.
Also high voltage wire or the cap is often damaged during service or repair work in the underhood space. We add that the breakdown site can not be visually detected. In this case, it is better to check this element of the ignition system using one of the available methods.
If everything is in order with the candles and wires, then the ignition coil may be the culprit that the engine is troiting. On motors with separate coils for each candle, this phenomenon is especially common. To check the ignition coil, unscrew the spark plug, attach it to the mass and start the engine. Please note that the thread of the candle should touch the mass tightly, the cap should be tightly put on the candle. Ignoring these rules can lead to burnout of the coil or commutator. A good spark with a characteristic crackle will indicate the health of the coil, the absence of a spark will indicate the need to replace the coil.

As for the electronic ignition distributor (switch), this element does not break down often. To check the candles, they are securely attached to the mass, then caps are connected to them, after which one person turns the engine with a starter, and the other evaluates the spark strength on the candles.

Motor tripping: air supply problems

Insufficient air supply at the inlet or its excess amount can also cause trilling in the cylinders. The air supply system may lose tightness and the engine begins to suck in excess air. The ECU does not take this suction into account, as a result, the stability of the operation is violated.

Checking the air system is quite simple. It is necessary to tightly close the inlet pipe next to the air filter, then pump air to create a pressure of about ½ atmosphere, and then look for a leak. If the pressure does not drop, then the system is sealed. The appearance of a hissing sound of outgoing air allows you to determine the problem area through which the motor sucks in excess.

Lack of air is often caused by a dirty air filter that has lost its capacity. The filter must be removed and the operation of the engine after removal should be evaluated. Also, there may not be enough air if the throttle valve is clogged or there is a problem in this unit. The specified element requires mandatory cleaning and verification. It is desirable to do this at each scheduled maintenance in parallel with the replacement engine oil, filters, etc.
Another cause of engine tripping may be TPS, DMRV or another sensor that sends the wrong signal to the ECU. The control unit in such a situation does not know to what degree the damper is actually open, how much air has actually entered the engine, etc. On the basis of incorrect data, the “brains” cannot accurately calculate the optimal composition of the fuel-air mixture in relation to dynamically changing modes of operation of the internal combustion engine.

In this case, you should view the readings of the sensors and read the errors with a scanner that connects to the vehicle's diagnostic connector. Then the values ​​\u200b\u200bmust be compared with the nominal ones. Deviations from the norm in the readings of the air flow meter or position sensor throttle valve cause the engine to start running.

Triggering on cylinders: the power system is faulty

When checking the power system, you should pay attention to the following nuances:

Fuel pressure;
- air suction;

Fuel pressure directly depends on the health of the electric fuel pump, which on modern injection cars is in fuel tank. The fuel pump mesh filter may be clogged in the device, there may be problems with the electric motor fuel pump or supply power to the pump. It is also worth checking the pressure regulator valve in fuel rail. Low pressure in the fuel supply system is often the cause of tripling.

The next step is to check the injection nozzles. This element tends to clog, resulting in reduced throughput, disrupted spray pattern, etc. Also, the failure of the injector itself should not be ruled out. To clean and check the nozzles, you can use the flushing stand, on which a special flushing liquid is pumped through the device and power is supplied. Under such conditions, the operation of the injector on the engine is simulated, performance is evaluated, etc.

You can also check and clean the nozzles yourself. To do this, a liquid is also pumped through the device (for example, a carburetor cleaner). Power is supplied through a simple circuit with a light bulb from the battery terminal.
A good nozzle should not leak when closed. Also, the injector must be opened in a timely manner when an electrical impulse is applied. It is not allowed for the nozzle to pour fuel, since the efficiency of the subsequent combustion of the charge in the cylinder depends on the quality of the spray.

If the fuel pressure and the injector itself are in order, then the ECU should be checked. The control unit itself rarely fails, but it is possible. More often this happens in cases where the factory firmware has changed when installing HBO or the engine has been chip-tuned. Unprofessional manipulation of fuel maps can cause the ECU to overflow fuel and flood spark plugs.

Reduced compression in the cylinders

A drop in compression indicates engine failure or wear. One or more cylinders are partially or completely not working, so fuel and air are supplied, but the mixture is not compressed properly. In this case, normal combustion does not occur. A drop in compression occurs due to burnout of pistons or valves, severe wear of piston rings and other defects in the BC, cylinder head or timing elements.

In this case, it is necessary to measure the compression in the engine, after which the unit is disassembled for detailed diagnostics and repair. In conclusion, I would like to add that the operation of a motor with an idle cylinder is prohibited, since driving with such a malfunction leads to a number of additional problems, which greatly complicates and makes subsequent repairs more expensive.