Correct troubleshooting sequence for engine vibration
author: Ann
2025-03-12
Obvious body shaking may mean that the vehicle has the following four conditions: one is serious carbon deposits in the engine, two is problems with the ignition system, three is unstable oil pressure, and four is aging of engine components.
First, the most common cause of car shaking is that the throttle is too dirty or the injector nozzle has too much carbon deposits. When there is too much carbon deposit inside the engine, the gasoline sprayed from the cold start injector head will be absorbed by the carbon deposits in large quantities, resulting in a too thin mixture at the cold start, making it difficult to start. In this case, it is easy to start the car only when the gasoline absorbed by the carbon deposits is saturated. After starting the car, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the vacuum suction of the engine to burn, which makes the mixture thicker. The combustible mixture of the engine is sometimes thin and sometimes thick, causing idle shaking after cold start. At this time, the owner should clean the oil circuit, and at the same time, check whether there is carbon deposit on the idle motor.
Secondly, if the idle shaking of the car is not caused by carbon deposits in the engine, the working condition of the spark plugs, high-voltage wires and ignition coils should be checked at this time. Poor working of the ignition system and poor sparking of the spark plugs will also cause this type of fault phenomenon. When it is determined that the main cause of idle jitter is the ignition system, you should check whether the spark plug has too much carbon deposits and replace the spark plugs.
Again, if you have cleaned the engine carbon deposits, washed the throttle, replaced the oil pad and spark plugs, etc., and still find that the car body shakes at idle, it is recommended to continue to check whether the fuel supply pressure and intake pressure sensor are normal. If the fuel pump supply pressure is abnormal or the intake pressure sensor has an incorrect value and poor operation, it will cause the car body to shake. At this time, you should check the oil pressure and replace the parts if necessary.
In addition to the above reasons that can cause idle jitter, car jitter is also related to the aging of the engine foot. The engine foot is actually the engine's shock absorber system. The engine foot is responsible for absorbing the slight vibration of the engine when it is running. If there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and the cab, causing jitter at idle.
Summary: When the car has idle jitter, don't take it lightly. Analyze and find the cause in time, otherwise, it is likely to cause greater hidden dangers.
First, the most common cause of car shaking is that the throttle is too dirty or the injector nozzle has too much carbon deposits. When there is too much carbon deposit inside the engine, the gasoline sprayed from the cold start injector head will be absorbed by the carbon deposits in large quantities, resulting in a too thin mixture at the cold start, making it difficult to start. In this case, it is easy to start the car only when the gasoline absorbed by the carbon deposits is saturated. After starting the car, the gasoline adsorbed on the carbon deposits will be sucked into the cylinder by the vacuum suction of the engine to burn, which makes the mixture thicker. The combustible mixture of the engine is sometimes thin and sometimes thick, causing idle shaking after cold start. At this time, the owner should clean the oil circuit, and at the same time, check whether there is carbon deposit on the idle motor.
Secondly, if the idle shaking of the car is not caused by carbon deposits in the engine, the working condition of the spark plugs, high-voltage wires and ignition coils should be checked at this time. Poor working of the ignition system and poor sparking of the spark plugs will also cause this type of fault phenomenon. When it is determined that the main cause of idle jitter is the ignition system, you should check whether the spark plug has too much carbon deposits and replace the spark plugs.
Again, if you have cleaned the engine carbon deposits, washed the throttle, replaced the oil pad and spark plugs, etc., and still find that the car body shakes at idle, it is recommended to continue to check whether the fuel supply pressure and intake pressure sensor are normal. If the fuel pump supply pressure is abnormal or the intake pressure sensor has an incorrect value and poor operation, it will cause the car body to shake. At this time, you should check the oil pressure and replace the parts if necessary.
In addition to the above reasons that can cause idle jitter, car jitter is also related to the aging of the engine foot. The engine foot is actually the engine's shock absorber system. The engine foot is responsible for absorbing the slight vibration of the engine when it is running. If there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and the cab, causing jitter at idle.
Summary: When the car has idle jitter, don't take it lightly. Analyze and find the cause in time, otherwise, it is likely to cause greater hidden dangers.
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