Engine repair is a complex and extremely important process, and the engine is the center of gravity of many equipment. For example, once a car engine fails, we must find a way to repair the engine. So how to judge the failure of the car engine and maintenance methods? So let's discuss it together, I hope it can be helpful to everyone!

The diagnosis and maintenance methods of automobile engine failure are as follows:

1. First step on the accelerator. If you find that the acceleration is not obvious, the power is lacking, and the engine makes a hysterical sound. The most likely times are when the engine is hot, or cold, or when there is a lack of fuel. Of course, small-displacement engines may also appear when accelerating too hard. Here I only talk about general displacements, such as 1.5 or more. The causes of such failures can be divided into air filter, spark plug, incineration line, gasoline, gasoline filter, gasifier, oil pump and other problems. Then we check the air filter again, whether it is dirty, whether the spark plug is old and needs to be replaced, the incineration coil is broken, the gasoline is not clean, for example, there is water in the oil circuit. Next, check the oil pump, carburetor, etc. None of these can be dropped, and they must be checked one by one to rule out the others.

2. If the engine has a hissing sound, like steam or air coming out of the engine, generally after hearing this sound, the engine will lose power quickly. The problem causing this could be: the engine is overheating and we need to look at the cooling system. There are also possible reasons: the exhaust system is blocked, the vacuum tube is leaking, or it may be cracked.

3. When accelerating, the engine will make a whirring sound, or it may also appear when decelerating. It always follows the RPM change and the sound size change. The possible reason for this phenomenon is: the power steering oil is short and full. Generator bearings may be damaged. Power steering pump, water pump problems, will produce similar noise.

4. The very loud noise comes out of the exhaust pipe, which is very annoying. Sometimes there is a similar sound from the front section. The main fault is in the exhaust system. Check whether the exhaust pipe is broken.

5. When the engine is changing speed, it makes a rattling sound, like something is hitting metal. When accelerating, when traveling, it may be inaudible, it may be the formation of the cylinder valve, and the adjustment valve can be changed. Lack of oil, lack of oil may also cause similar problems, and the oil pressure is relatively low, you have to check the engine oil pressure.

6. When you step on the accelerator pedal, you will hear a thumping sound coming out of the exhaust pipe. The sound may not be very loud, and the car will not be abnormal when driving, and the fuel consumption will increase. At this time, it is recommended to check whether the muffler and exhaust pipe are damaged.

7. The engine has a kicking sound, like the sound of a pencil hitting a table. When the sound increases, the engine speed also increases. The possible reasons are: there is dirt inside the engine. At this time, it is recommended that you replace the oil, filter the machine, and shampoo the machine. Others could be valve issues.

8. There may be no problem during driving. There will be a clicking sound when accelerating. At this time, it is recommended that you check the setting of the burning time. The reasons for this phenomenon may be: the engine is overheated, the engine has carbon deposits, the oil quality is not good, and it needs to be increased. grade of oil.

After reading the above judgment and maintenance methods for car engine failures, everyone must be very useful, and I hope everyone can apply what they have learned. As long as we encounter a car engine failure in our daily life in the future, we must first correctly determine what kind of failure it is, and then give corresponding maintenance methods, so as to save a lot of unnecessary trouble.