Troubleshooting methods
To eliminate the effect of engine tripping, the car enthusiast will need some theoretical knowledge of the structure of the power unit, as well as skillful hands. In order to cope with most problems, a minimal set of tools is also useful. The following are engine elements that may hide the cause of the tripping, as well as ways to troubleshoot problem areas of the car.
Problems in the piston group
The cause of engine tripping can be wear of the piston and or piston rings, which most likely damage the cylinder walls, causing scratches. There is only one solution - complete repair of parts. Naturally, this is not a pleasant and rather expensive procedure.
The car owner will have to conduct a complete disassembly of the cylinder head and pan. Afterwards, you will need to pull out the pistons and carefully inspect the cylindrical walls - if wear is visible on them, then complete dismantling of the engine is necessary, and then, if the wear is really not small, spending on the required repairs.
Problems in the block head
Components of the cylinder head can cause engine tripping. This is especially true for valves that have been in use for a long time and have a significant degree of wear, which is why they are not in tight contact with the seat. As a result, exhaust gases move back into the combustion chamber during engine operation, causing the engine to suffocate.
To resolve this problem, the valves must be replaced. In order to perform this procedure, a complete disassembly of the head will be required. More often than not, the guide bushings are broken and will need replacement, which means the cylinder head needs a complete overhaul.
To fix the problem, most likely, you will need to replace all the components of the cylinder head.
Problems with the carburetor
Finding out the cause starts with regulating the supply of the fuel-air mixture. Everything is adjusted using quality and quantity screws, which corresponds to the recommendations in the instructions that come with the purchase of a VAZ 2107 engine.
If the adjustment does not bring results, then you will need to rebuild the carburetor completely. The VAZ 2107 engine is equipped with injection elements - Weber and DAAZ. This pair of carburetors has the same design, and therefore the repair kits for the elements are identical. Everything for carburetor repair is purchased in specialized auto parts stores or on the auto market.
Problems with the ignition system
If any of the parts that make up the ignition system break down, the engine will also trip. In simple terms, a spark does not ignite on one or several cylinders at once. To fix the problem, you need to diagnose the ignition system.
The spark plugs will need to be unscrewed from the block head and examined carefully. First, carry out a visual inspection for cracks, dirt or other problems. Next, ring the spark plug contacts using tests or a spark plug stand.
If there is a breakdown, then replacement is necessary with preliminary adjustment of the required distance between the contacts.
There is also an old way to check spark plugs. It is necessary to unscrew the cylinder spark plug and connect it to a high voltage wire, and then, leaning the spark plug against the car body, crank the ignition.
If we talk about high-voltage wires, then their diagnosis ends with checking the resistance value. A usable wire is 5 ohms. If the indicator does not correspond to this number (above or below the norm), then the wire will need to be replaced. It is better to replace a whole set of wires with a preliminary check of their functionality.
You can test the ignition coil using a multimeter. In this way, you can check for the presence of contact and the value of the resistance indicator. If a problem is detected, replacement will be required.
| Malfunction | Cause of malfunction | Elimination method |
| The engine is difficult to start or does not start at all | 1. Humidity and contamination of the coil and spark plugs, so there is no ignition spark. 2. Loosening or oxidation of connector contacts. 3. Wet spark plugs (after frequent attempts to start the engine). 4. The speed sensor is loose - the distance to the engine flywheel is too large. 5. The rotation speed sensor is faulty; the wire has contact with ground and is broken. 6. The ignition coil is faulty. 7. The power module or control unit is faulty. | 1. Dry or clean and. if necessary, treat with spark plug spray. 2. Check and replace if necessary. 3. Remove and dry the spark plugs. 4. Attach the speed sensor. 5. Replace at an auto repair shop; check the wire or replace it. 6. Replace the ignition coil. 7. Have it checked by a workshop and replace if necessary. |
Problems with the fuel supply system
The fuel supply includes the fuel filter and supply pipes. Contamination of one of these engine design parts can cause a small amount of fuel supplied to the carburetor. To fix the problem, you will need to replace the fuel filter or thoroughly clean the pipes.
There is another element of the system that affects the normal supply of fuel - the fuel pump. If it breaks, repair or replacement is necessary. After all repair procedures, fuel will begin to flow steadily, due to which the tripping effect completely disappears.
Air filter problems
Engine trouble may also occur due to contamination of the air filter, as a result of which the normal amount of air does not enter the engine to form an air-fuel mixture.
To save the engine you will need to replace the filter element. There are no particular difficulties in this procedure. To do this, you just need to open the hood, then unscrew the nuts from the housing cover and pull out the worn filter. Replace it with a new replacement element and return all parts to their original place.
Conclusion: There is nothing difficult in finding the cause of the VAZ 2107 engine tripping. It is best to start diagnosing the problem with the elements that take part in creating the air-fuel mixture. Then check the ignition and fuel supply system. And finally, the most dangerous cause of problems may be the need to completely repair the engine due to wear of the elements of the piston group and the cylinder head.
Causes of engine tripping
Why does the VAZ 2107 carburetor throttle and what are the reasons for this effect? In this article we will try to understand this issue as much as possible. Unlike the injector, the reasons will be different, but will be interconnected and similar.
So, let’s figure out where to look for problems with engine tripping in a carburetor VAZ 2107:
- Piston group.
- Valves and their derivatives.
- Carburetor.
- Ignition system.
- Air filter.
Now that all the places of origin of the malfunction have been sorted out, it’s worth moving directly to the elimination methods.
Why does the VAZ 2107 Engine Troit Carburetor ~ AUTOVIBER.RU
Why does the VAZ-2107 engine carburetor fail and what are the prerequisites?
As the number of working cylinders in the car has decreased, you can feel that the vehicle has become less massive. Even at idle, there is significant vibration, while a shudder can be heard in the engine department. Apart from everything else, it is easy to see that gasoline consumption has increased significantly, and when you bring your nose to the exhaust gases, you can hear the smell of fuel.
If you do not pay attention to such a problem, the engine may eventually require a complete overhaul. This action will entail a waste of not only time, but also significant money.
Possible causes of malfunction
If the engine of a VAZ-2107 fails, several circumstances may contribute to this. And in order to remove the malfunction, you should perform the following actions:
- Find which specific cylinder is faulty.
- Check all spark plugs for functionality.
- Inspect all wires, injectors and valves.
- Check how the air intake into the carburetor works.
- Check the operation of both the hot and cool engine.
Finding which specific cylinder has failed is easier than usual. To do this, while the motor is running, remove the high-voltage wires one by one. But this can only be done in this case if the engine on the VAZ-2107 (carburetor) is troublesome. Of course, it will not be possible to find the cause of the breakdown, but it will certainly be possible to find a non-functioning cylinder.
Ignition module or coils
Some vehicles may use an ignition module or individual coils for each spark plug. Their failure also leads to tripping of the power unit.
There is no spark - the air-fuel mixture in the cylinder does not burn.
How to check
If the engine starts to leak, remove the caps from the spark plugs one by one. We move it a little away from the central contact of the spark plug and observe whether there is a spark between them. If there is sparking on all spark plugs, the ignition module is working.
The malfunction of individual ignition coils can be checked with a multimeter, but this is the topic of another article, or using a scanner. Diagnostics will show misfire on one cylinder. In this case, the coils can be rearranged. If the misfires “move” to another cylinder, then it is she who is to blame.
It happens that at idle speed or low loads the coil works properly, it manages to ignite the mixture efficiently. At maximum, misfires may occur, it does not have time to produce a spark.
Ignition adjustment
The injection modification of the VAZ 2107 does not require adjustment of the ignition timing. The electronic control unit, using a sensor, determines the optimal ignition timing. The participation of the car owner in adjusting the operation is limited to setting the engine timing belt to the marks.
To check the performance of the ECU and the functionality of the sensors, it is necessary to connect a computer with specialized software. In this way, the cause of most electronic ignition system malfunctions can be determined.
It is also worth checking the operation of the throttle position sensor yourself. When the throttle is closed, the voltage on the sensor should be no higher than 0.55 volts, and when fully open - 4.5 volts. Measurements must be made with a voltmeter with the ignition on.
The engine is the heart of the machine, which, if not properly maintained, can break down and cause failure of other systems and components. There are often situations when the car loses power, vibration appears, and the equipment stalls at idle. The cause of this phenomenon can be various engine breakdowns, including misfires, which reduce engine efficiency and can lead to failure of the fuel and exhaust systems.
Almost every motorist has encountered the problem of flammable mixture ignition. There can be many reasons for problems when igniting a combustible mixture, but they all lead to a drop in engine power and the shutdown of one or a pair of cylinders. On cars with an ECU, when the engine malfunctions, errors appear that indicate problematic parts of the unit. If misfires occur, you should urgently contact a service station to troubleshoot the problem.
Detection of a defect and its impact on the performance of the car
Even an inexperienced owner of domestic automotive products can determine that the engine is malfunctioning by the characteristic sound of the engine. The specificity lies in the feeling of it. That the power unit works like an old washing machine, with interruptions and vibration. In turn, with this malfunction, the sounds from the muffler will resemble popping instead of the standard hissing.
Misfires - what is it?
Let's start with what is a cylinder misfire? This phrase means a situation where in one of the cylinders the ignition of the fuel mixture occurs late or slow. Simply put, the “acceleration” of the piston in some of the cylinders is slower than in the others. As a result, there is a violation of the synchronization of the engine, the engine runs unevenly, jerking occurs, fuel consumption increases, and the dynamics of the car decreases so much that even a small hill becomes a big test. In addition, in cars equipped with an ECU, a corresponding error appears on the display in the form of a code, for example “P0304” - misfire in the fourth cylinder. The last digit in the code corresponds to a specific cylinder.
