Engine shake refers to the abnormal vibration phenomenon of the engine during operation, which will affect the stability and power of the car, and even lead to engine damage. There are many reasons for engine shake, mainly including the following:
1. Ignition system failure.
The ignition system is the core component of the engine, which is responsible for converting electrical energy into sparks, igniting the mixture, and driving the piston motion. If the ignition system fails, such as aging spark plugs, broken high-voltage wires, damaged ignition coils, etc., it will lead to insufficient or uneven spark strength, so that some cylinders cannot ignite normally, thus causing engine shaking.
The solution is to check and replace the relevant parts of the ignition system to ensure the quality and stability of the spark.
2. The air intake system is blocked.
The air intake system is the breathing organ of the engine, which is responsible for mixing air and fuel to form a suitable mixture, ** to the engine. If the air intake system is blocked, such as the air filter is too dirty, the throttle is deposited, the idle valve is faulty, etc., it will lead to poor air intake, which will make the proportion of the mixture out of balance, affect the combustion efficiency of the engine, and cause the engine to shake.
The solution is to clean or replace the relevant parts of the air intake system to ensure the smooth and uniform air intake.
3. The water temperature system is abnormal.
The water temperature system is the cooling organ of the engine, which is responsible for dissipating the heat generated by the engine through the water tank, fan, thermostat and other components to maintain the appropriate temperature of the engine. If there is an abnormality in the water temperature system, such as lack of antifreeze, the thermostat is stuck, the fan does not rotate, etc., it will cause the engine to overheat or overcool, making the working state of the engine unstable, thus causing the engine to shake.
The solution is to check and repair the relevant parts of the water temperature system to ensure the normal temperature of the engine.
4. The cylinder pressure is unbalanced.
Cylinder pressure refers to the pressure of each cylinder inside the engine, which reflects the working state and power output of the engine. If the cylinder pressure is unbalanced, such as if the pressure of one cylinder is too low or too high, it will cause the engine to run uncoordinatedly, which can cause the engine to shake. There are many reasons for unbalanced cylinder pressure, such as cylinder leakage, piston ring wear, valve unsealed, etc.
The solution is to use a cylinder pressure gauge to detect the pressure of each cylinder and repair or replace it according to the specific situation.
5. Poor fuel system.
The fuel system is the fuel supply organ of the engine, which is responsible for transporting fuel from the fuel tank to the fuel injector and then injected into the air intake system to form a mixture. If the fuel system is defective, such as the fuel injector is blocked, the oil pump is faulty, the oil circuit is leaking, etc., it will lead to insufficient or uneven fuel, which will make the proportion of the mixture out of balance, affect the combustion efficiency of the engine, and cause the engine to shake.
The solution is to clean or replace the relevant parts of the fuel system to ensure the quality and stability of the fuel.