The abnormal operation and shaking of engine cylinders are mainly caused by abnormal combustion, resulting in engine shaking. The reasons for engine misfire and shaking are usually:
1. Abnormal ignition
For example, spark plug damage, ignition module malfunction, and other intake and exhaust problems are mainly caused by valve combustion corrosion.
2. Engine cylinder not working properly, missing cylinder
This reason is quite complex, from the ignition system, to the air-fuel ratio, and even the ECU adaptive learning function, all of which may cause misfire.
3. What should do if the engine cylinder is not working properly and shaking?
Let's learn about the maintenance steps and methods for engine misfire and shaking together.
Whether the mixed gas burns well or not can be determined by observing the condition of the spark plug. If it is found that the spark plug of a certain cylinder is significantly different from the other ones, it indicates that the misfire shaking is caused by this cylinder.
If a cylinder misfire occurs in a car, but the car can still operate normally without obvious shaking, it can be suspected that the fault is caused by the car wiring harness. You can shake the car wiring harness by hand and observe the engine operation to find the fault point.
If there is a malfunction in the ignition coil or high-voltage wire, it can cause the car to have a cylinder shortage in the engine. When removing it, carefully observe whether there is any damage or leakage. If unsure, you can try using a new one.
During the operation of the engine, carbon deposits will be generated. If a lot of carbon deposits are generated on the piston or valve, it will cause the valve to close loosely and the compression ratio to decrease, causing the car to shake and light up the fault light. In this case, you can try removing carbon from the cylinder without dismantling it. If the misfire is only caused by carbon deposits, this method can be used to repair the car.
The working condition of the fuel injector can be determined by the condition of the spark plug head, and if conditions permit, an injector testing machine can also be used to judge its quality.
Nowadays, there is an OBD interface on cars, and when there is a fault, diagnostic equipment can be used to read the fault code first, helping technicians quickly identify the scope of the fault. Diagnostic equipment is only an auxiliary tool and cannot be completely relied on.
If the driving environment is poor and the car does not receive timely maintenance, resulting in irreparable cylinder failures, the only solution to the misfire problem is to overhaul the engine.
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