Two months ago, a car owner dropped the cylinder head due to a spark plug and eventually replaced the engine assembly. Considering that many people do not understand or pay attention to spark plugs, share the owner’s experience here. I hope everyone can take warning.
In early April, I drove back from Beijing to Wulanchabu, an old town in Inner Mongolia. At a high speed of 10 kilometers from Ulan Qab, the car was obviously shaken. My first reaction was a lack of cylinder because I was not far from home. , Make do with continue to open. After arriving home found that there is no Audi 4S shop, can only be opened to a repair shop to check, computer monitoring is a 2-cylinder misfire. So take the spark plug out to check, look at the spark plug, I instantly forced.
Spark plugs are Volkswagen Platinum, Audi is also universal, from the card can be seen that the original factory is Bosch, has been burned this coercion, years ago maintenance of just changed spark plugs, not more than six months ah. Four spark plugs broke, most What's wrong is that there is a spark plug head missing.
This means that the head is likely to fall into the cylinder wall and either be burned in the cylinder or continue to flow from the cylinder through the turbine into the interior of the engine. Finally, it passes through the three-way catalytic system and is discharged outside the vehicle. The head is a high-temperature resistant ceramic tile. In general, it is not easy to burn. If it passes the turbine, it will directly interrupt the turbine blade.
At the same time, I found that the age of the four spark plugs is obviously different.
This incident is most likely to be associated with the maintenance of a 4S shop some years ago. This group of grandchildren received four spark plugs, but only two spark plugs were replaced. The problem was one of the two spark plugs.
I didn't use Audi's spare parts for my hometown. I temporarily changed the four spark plugs, and a modified Camry ignition coil, before finally returning to Beijing.
On the second day after returning to Beijing, the 4S shop was opened for maintenance. The inside of the cylinder was checked with an endoscope. The head was not seen, and it was not seen why. The cylinder head was removed and the cylinder head and the cylinder were found to be small. The scratches, I still couldn't find the head, I don't know if the head was burned or hit.
In fact, I think scratches are still acceptable. There are no major problems after replacing the new spark plugs. However, replacing the engine assembly is too different. First, the car was bought for a year and a half. The second will definitely affect the future. The price of the car. The entire vehicle is still in the warranty period. The 4S shop advised me to replace the engine assembly. The engine is the Volkswagen original engine. It is exactly the same as before. It finally tangled for several days. In order to reduce the probability of an accident, it was replaced. Now.
The overall consultation with the 4S shop went smoothly. The conclusion is:
1, The quality problem caused by spark plugs, 4S shop recognition, but did not expressly stated that only some spark plugs were replaced during the last maintenance;
2. The 4S shop was responsible for all maintenance costs, and replaced the new engine. A replacement vehicle was arranged during maintenance.
3, After the replacement of the engine, the engine number does not change, but there is a large green record, which will affect the sales of used cars in the future. This I believe.
At present, the new engine has run more than 3,000 kilometers. It has been a new car, and it has not exceeded 100 at ordinary times. No abnormalities have been found for the time being. The spark plugs of Bosch that have a problem, I guess the quality of the spark plugs is not good enough. Problems, usually a lot of spark plug inspection, especially with the turbine and the start and stop function of the car, spark plug consumption speed faster than other cars, pay attention to see the owner of the manual indicated by the replacement. In addition, how to manage the 4S shop service, must be maintained People are staring at the car, and they work hard. Don't shop for massages or anything else. Fortunately, they have been doing maintenance in the 4S before the warranty period. There is no protection. Money, not a change of engine, is to open a cylinder head, take an endoscopy, you can die for you.
As we all know, a spark plug failure will cause the car to idling and oscillating, the power drop will be obvious, the fuel consumption will increase, and the engine cylinder may be missing. However, there are many reasons that affect the idle speed and jitter, and the power and fuel consumption are not necessarily the cause of the spark plug. The phenomena are not all spark plug problems. Failure of the engine fuel injection system can also cause cylinder deficiencies. Blockages such as fuel line blockage (eg, clogged injectors) can cause cylinder deficiencies. However, spark plugs are consumables that are required to take into account problems. The possibility is greater than other components, so first consider checking the spark plug to see if there is a problem with the spark plug.
When the spark plug performance degrades, regular idling often occurs during idling operation. Sometimes, when the engine speed is higher than idle, the vibration failure phenomenon disappears, and the acceleration of the accelerator pedal no longer fluctuates. In severe cases, cylinder vacancy will be caused. Causes irregularity in the idle speed to turn off the engine automatically. The vehicle starts hard or cannot start.
In addition, the use of spark plugs of poor quality can also cause jitter.
Inexperienced novice drivers, especially cars with poor driving and quietness, are often confused about regular jitter. Here you can use the mobile phone APP to play and test it. The test is very simple. Just download the APP and put the phone on In the stable position of the side or center console, start the engine test for 2 minutes to see the result, 0 peripherals.
No harm without comparison, let's see what the regular jitter is like.
The following is a test comparison before and after the replacement of a spark plug by a vehicle owner:
Bad spark plugs of poor quality can cause intermittent jitters and even unstable idling speeds. The following is a comparison of the test before and after the owner replaced a cottage spark plug:
It should be noted that the sparks caused by the spark plugs are usually small and intermittent unless the cylinder is missing. When the vibration is strong, but the idle speed is stable, and there is no power loss in the driving, the vast majority are machine feet. The problem is like the following:
