Is there shaking and rumbling near Changan cx20 engine?

Engine jitter is related to many reasons, such as excessive carbon deposition in intake system such as throttle valve and idle valve, poor atomization of fuel injector, poor working performance of ignition system, etc., which is directly related to the working performance of spark plug, high-voltage line and ignition coil:

1, engine cylinder shortage, engine cylinder shortage mainly refers to the abnormal operation of one or more cylinders of the engine, which is generally manifested as: the exhaust gas flow discharged by the automobile is obviously intermittent, the exhaust pipe is seriously shaken, and the engine jitter can be obviously felt, sometimes accompanied by sudden noise. This is mostly related to the failure of ignition coil;

2. The carbon deposit here includes cylinder carbon deposit, throttle carbon deposit, spark plug carbon deposit, intake carbon deposit and so on. These positions are closely related to the power output of the engine. When there is too much carbon in the engine, the ignition energy of the automobile decreases and the intake efficiency decreases, which eventually leads to the symptoms of engine jitter and weak acceleration.

3, fuel system failure, adding an inappropriate fuel label (for example, 90 plus 93), resulting in a decline in the output power and power of the car; Or because the vent hole of the fuel tank cover is blocked, the fuel tank switch, the fuel filter and the oil pipe between the fuel tank and the carburetor are partially blocked, which can not meet the required oil supply, resulting in too thin mixture and engine jitter;

4, air intake system failure, air is one of the power sources of the engine, if the air filter is not cleaned in time for a long time, insufficient air will cause the combustible mixture to be too rich and reduce the engine power; If it is a vehicle with a turbocharger, once the turbocharger fails, it will also cause the engine to shake when accelerating;

5, cold start, when the car is cold started, the engine lubrication effect is poor, the oil fluidity is poor, and it is also sticky, so there will be abnormal noise of mechanical wear, cold car starts, the coolant temperature is relatively low, the mixture is relatively thick, and insufficient combustion will lead to engine jitter. This is generally a normal phenomenon, and it will get better after a hot car.