The first one is that the cylinder pipeline is broken or damaged when replacing the spark plug, resulting in abnormal ignition. The second type is that the spark plug is incorrectly installed, not tightened or the threads are not aligned, or the spark plug that can be directly replaced has product quality problems at the same time, which is not a qualified product.
In view of the first case, it is only necessary to recheck the oil cylinder pipeline to see if it is wrongly connected, and then reconnect the corresponding oil cylinder pipeline after finding the problem. In the second case, it is necessary to check the spark plug to see if it is not tightened or the spark plug has product quality problems, and then re-tighten or replace the spark plug to deal with the engine jitter of the car.
Automobile engine jitter is not only the problem of spark plug, but also the problem of spark plug embrittlement and oil injector stain. After replacing the spark plug, the engine jitter is caused by the above two conditions, so it is necessary to check the remaining parts such as spark plug and fuel injector.
Is there a stable period for changing spark plugs?
Generally speaking, it is not enough to replace a new spark plug with the same specification, and the computer operating system will automatically match the most suitable operation mode. However, if it is replaced by other spark plugs with different specifications, such as Perkin spark plugs with nickel-based alloys, it must have a certain stability period. In the process of replacing the spark plug, it is necessary to cut off the negative phase of the switching power supply, then calibrate the ECU system software and relearn the data information of the new spark plug. After the study and training of automobile computer operating system, the newly replaced spark plug can work stably.