What are the common faults of the engine? Can you be specific?

If there is abnormal noise during the operation of the automobile engine, the abnormal noise will be different due to the different fault parts during maintenance. Therefore, the maintenance personnel must first determine where the abnormal sound occurs, which will help solve the problem in time.

If the fault sound is sharp when the cold car starts, it is necessary to check whether the engine drive belt is worn and how worn it is. If the engine drive belt is seriously worn, it needs to be replaced in time; When the car is working, the engine can work normally, but there is a sound similar to metal collision. At this time, it is necessary to check the structure of the whole vehicle, check the connection between parts and the integrity of parts.

If no problems are found after the inspection, it is necessary to check the gas in the cylinder. In this detection process, it is necessary to detect whether the gas in the cylinder is fully burned by temperature detection, and then find out the cause of the fault sound; If the engine is running and there is a ticking sound during the acceleration of the car, it is necessary to check the lubrication between engine parts. If the lubrication is insufficient, it is necessary to add it in time; If the car is hoarse when driving, check whether the vacuum tube of the engine is damaged. If it is damaged, it needs to be replaced in time.

2. Engine cylinder failure

In the process of engine operation, when the cylinder is missing, it is necessary to check the engine components, cylinder high-voltage lines, etc. , so as to clarify the cause of cylinder leakage, and repair or replace the faulty parts in time. Through inspection, if it is found that the fault reason is the lack of two cylinders, then the fault reason is generally a problem with the high-voltage line of the engine; If the result of fault inspection is that three cylinders are missing, then the reason may be that there is something wrong with the injector and it needs to be replaced at this time;

If the result of checking the fault is that the four cylinders are missing, the reason may be that there is something wrong with the spark plug and it should be replaced in time. In addition, if after a series of inspections, the reason for the lack of cylinder is not found out, then the maintenance personnel need to re-check the mechanical system of the car. If the cause of the failure is found, it needs to be repaired in time. As far as mechanical failure is concerned, we can check whether the branch line of the engine is firmly connected and whether the mechanical parts fall off. If this happens, we need to fix it.

3. Exhaust pipe shooting failed

When the car is running, its exhaust pipe is shot and needs to be repaired in time. Generally speaking, if the gas fuel works for a long time or the gas-fuel ratio is high, it will cause the exhaust pipe to beat.

When the exhaust pipe of a car explodes, we can find out the cause of the failure by reading its fault code. When judging the cause of the fault, we need to know the ignition time and whether the injector is in normal state. The judgment method is to start the vehicle in a low temperature environment and judge whether the working condition of the injector is stable through observation. After confirmation, we need to measure the fuel pressure with pressure gauge equipment and observe its reading, so as to judge the cause of the failure.