A fairly common malfunction is unstable operation of the engine in idle mode, during so-called throttle changes, and also when the speed while driving is low. In this case, the driver begins to feel increased vibrations on the steering wheel, gearshift lever and body.
In other words, the car shakes a little because the engine is shaking. In fact, the concept of “troubling the engine” should be understood that one or more cylinders do not work, that is, the fuel-air mixture in them does not ignite, does not ignite in a timely manner, or the combustion of the charge does not occur in full.
Moreover, if the speed is increased to XX or when the engine is under load (while driving), the operation of the power unit is normalized, the engine twitching disappears, the engine runs smoothly and stably. Next, we will look at why the engine stalls at idle and what the driver should do in such a situation.
Reasons for tripling
Strong engine vibrations are the first symptom of tripping. At the same time, misfires, exhaust problems and other symptoms may occur. Troubleshooting can be permanent or appear occasionally; it can appear during heavy engine loads or during different temperature conditions.
Engine failure during tripping is distinguished primarily by the fact that the combustion process of fuel assemblies in the cylinders is disrupted. Accordingly, this is accompanied by strong vibrations. However, it is fundamentally wrong to consider the appearance of increased vibrations as the only sign of tripling, since there are a number of reasons when the same thing happens.
Trouble engine injector causes
The main problems that contribute to tripling include the following.
- Excessive air in the system.
- Rich FA.
- Problems with the ignition system.
- Wear of engine elements, which is accompanied by a drop in compression.
Thus, the power unit begins to triple as a result of either a mismatch in the composition of the fuel assembly, or untimely ignition of the mixture, or the inability to ignite the fuel. Other types of violations are also possible.
To determine the specific cause of tripling, you need to narrow the search, thereby leaving the only correct reason.
- They usually start with the fuel system. The air supply is then analyzed. In some cases, this is caused by the failure of certain sensors.
- Ignition failure is an equally common cause of power unit tripping. Added to this is a weak spark from the spark plugs. It is recommended to always check the latter as soon as tripping or other ignition-related problems occur. The candles are simply unscrewed and inspected for defects, their color is analyzed, etc. For example, if the insulator of a candle is damaged, then smoke is clearly visible in this place.
- Armor wiring testing. If the engine shakes occasionally in wet weather, this is generally an additional symptom that shows tripping due to wires. The signs go away as soon as the engine warms up and reaches its operating temperature. It is recommended to pay special attention to rubber insulators, which tend to dry out and crack over time.
Attention. Rubber caps for armored wiring often deteriorate after repair work. It can be difficult to visually determine a breakdown until the cap is removed.
How to identify the causes of engine tripping
The VAZ 2115 injector has “childhood diseases”, like all cars in principle. We'll talk about this a little later. The first step is to inspect the spark plugs. By removing the caps of the high-voltage wires one by one, you can determine which spark plug is not working; if the sound and rhythm of the engine does not change, it means that the faulty spark plug has been found and must be replaced
This operation must be performed with great care, as it may cause severe electric shock. The next reason is high-voltage wires
The engine is hot, the insulation of the wires is destroyed, and the wire begins to break through. Plus, sadly enough, the quality of spare parts is low. Only complete replacement of high-voltage wires helps in solving the problem.
You should also pay attention to the coarse fuel filter, which is located in the gas tank. This malfunction is also determined in the service. The VAZ engine may fail due to a burnt-out valve and this is the saddest reason
You should go to the service center to measure the compression in the cylinders, because you won’t be able to do the procedure alone, you need an assistant who will turn the engine start key, and you should take into account that you will need a compression gauge, an ordinary car user does not need one, but the service center definitely has one.
It would be a good idea to pay attention to the coolant level. After all, when the cylinder head gasket breaks, the engine also begins to suffer
When the cylinder head gasket is punctured, engine coolant enters the cylinders, mixing with oil to form an emulsion visually similar to condensed milk. Moreover, the gasket may be pierced along the contour of the engine water jacket, or it may burn out due to exhaust gas breakthrough, this does not change the essence. If it has been bad for a long time, but you still continued to drive the car, then just pull out the oil level dipstick, and this emulsion will be visible at its tip. At the same time, the coolant level in the engine drops. Eliminating this cause is technologically similar to repairing a burnt-out valve. Only service, and a good specialist. In general, on a VAZ 2115 engine, the injector valve adjustment should be constantly paid attention to and adjusted every 10,000-15,000 km. mileage
Trouble injection engine: find the fault with your own hands
If the engine is unstable, this phenomenon is called “missing” abroad. To our ears the word is foreign and not understandable to everyone. Experienced mechanics know what this is. Missing is a misfire of the combustible mixture in one of the cylinders. More often than not, drivers in this case say that the engine is misfiring. In this article we will find out what causes the occurrence and what ways to eliminate the defect are possible.
Malfunction of the injector or nozzles
The injection engine fails in the following cases:
- The injector is faulty, but this is very rare.
- Bad gasoline was poured in or fuel system cleaner was used incorrectly.
- Clogged injectors.
- The electrical power supply circuit for the injectors is open or shorted.
Engine diagnostics and a competent motor mechanic will help eliminate such malfunctions. To independently check the injector and nozzles, you need experience and special equipment.
Causes of malfunction
Motorists are wondering: why does the VAZ 2107 engine suffer from injector problems? Many owners of injection VAZ 2107 encountered the fact that the engine began to stall. This malfunction is typical for the entire family of Lada engines. What are the reasons for this effect and where to look for the problem:
- Fuel pump and filter.
- Injectors.
- Spark plugs and high-voltage wires.
- Air filter.
- Throttle.
- valves.
- ECU and sensors.
How to eliminate engine tripping
After diagnosing and determining the cause of the motor malfunction, it is necessary to begin to eliminate this malfunction. Well, if the problem is only in high voltage wires or spark plugs, they are simply replaced with new ones. The same situation applies to the switch and ignition coils. But if the problem is a clogged air or fuel system, then everything is much more complicated. Clogged injectors can be washed with a flushing agent; if necessary, the oxygen sensor should be replaced, as it will most likely not function correctly.
If the result is poor after washing the injectors (fuel continues to flow in large quantities), then it is necessary to replace the injectors with new ones. The same must be done with the fuel pump, as well as other parts of the fuel supply system that are damaged when the engine starts, it is advisable to replace them with new ones. During repairs, it is also necessary to replace elements with broken seals and the air filter.
Reason one - spark plugs
I wrote in detail about how to determine faults in car systems using spark plugs
here .
I recommend reading it - it turned out to be useful, judging by your reviews, thank you.
We unscrew the spark plugs one at a time and look at their insulator.
If it is covered with dense carbon deposits, then it is difficult for a spark to penetrate it. The current seeks the path with the least resistance, so the spark will not be between the electrodes, but will “go” along the insulator to the side. Its energy will not be enough to set fire to the air-fuel mixture. This cylinder will not work.
Heavy carbon deposits on the spark plug electrodes may cause the engine to trip.
We inspect the external condition of the spark plug insulator.
If there are microcracks, then part of the current will not be converted into a discharge, but will escape through these damages. You need to look at the internal insulator, which is screwed into the cylinder head, and at the external one, onto which the armor wire cap is placed.
Any chips or damage can lead to poor sparking or its complete absence.
A superficial breakdown of the spark plug insulator is one of the reasons why the engine began to stall
Large or small gap between electrodes.
Many people have heard or know that for certain engines, ignition systems and types of fuel used, spark plugs with a certain gap are required. Usually its value is indicated by the manufacturer of engines and cars.
In order for the spark plug to work well and the engine not to stall, a certain gap between its electrodes is needed
How to check the spark without special devices on the engine
This is an old, “grandfather” method, some people are afraid of it:
- They unscrewed the spark plug;
- They put an armored wire on her;
- They leaned it with the inner body, the metal part, against the engine;
- Turn on the ignition and turn the starter.
Be sure to hold on to the rubber cap of the armored wire, otherwise your hand will shake violently. This is what many are afraid of
