Correct troubleshooting sequence for engine vibration
author: Ann
2025-03-14
At this time, we should conduct corresponding inspections and repairs in time to prevent the situation from further deteriorating. Although the shaking of the car body seems to be a trivial matter, if you do not pay attention to the detection, it is very likely to cause major hidden dangers.
Obvious shaking of the car body may mean that the vehicle has the following four conditions: one is that the engine has serious carbon deposits, the second is that there is a problem with the ignition system, the third is that the oil pressure is unstable, and the fourth is that the engine components are aging.
First of all, 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 are too many carbon deposits inside the engine, the gasoline sprayed by the cold start injector head will be absorbed by the carbon deposits in large quantities, resulting in a too thin mixture of 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, and the mixture will become 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 car's idle jitter is not caused by carbon deposits in the engine, then you should check the working conditions of the spark plugs, high-voltage wires and ignition coils. Poor working of the ignition system and spark plug sparking conditions 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 plugs have too much carbon deposits and replace the spark plugs.
Thirdly, 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 working conditions, 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 mounts are actually the shock absorption system of the engine. The engine mounts are responsible for absorbing the slight vibrations of the engine when it is running. If there is a problem with the engine mounts, these vibrations will be transmitted to the steering wheel and the cab, causing vibrations at idle.
Obvious shaking of the car body may mean that the vehicle has the following four conditions: one is that the engine has serious carbon deposits, the second is that there is a problem with the ignition system, the third is that the oil pressure is unstable, and the fourth is that the engine components are aging.
First of all, 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 are too many carbon deposits inside the engine, the gasoline sprayed by the cold start injector head will be absorbed by the carbon deposits in large quantities, resulting in a too thin mixture of 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, and the mixture will become 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 car's idle jitter is not caused by carbon deposits in the engine, then you should check the working conditions of the spark plugs, high-voltage wires and ignition coils. Poor working of the ignition system and spark plug sparking conditions 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 plugs have too much carbon deposits and replace the spark plugs.
Thirdly, 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 working conditions, 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 mounts are actually the shock absorption system of the engine. The engine mounts are responsible for absorbing the slight vibrations of the engine when it is running. If there is a problem with the engine mounts, these vibrations will be transmitted to the steering wheel and the cab, causing vibrations at idle.
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