What Causes Body Shaking During Acceleration from 30 to 40?

[WalterLynn]

It may be due to aging of internal insulation components, excessive carbon buildup causing poor combustion, or malfunctions in the electronic control system, requiring timely repair at a service center. Below are the specific reasons for the above issues: Aging of Internal Component Insulation: Prolonged use can cause the insulation of engine ignition coils or spark plugs to age, resulting in insufficient ignition energy, poor engine combustion, and unstable operation. Replacing the damaged ignition coil or a set of spark plugs can resolve this issue. Excessive Carbon Buildup: Too much carbon buildup inside the engine can cause the fuel in the vehicle's intake and injection systems to be absorbed by the carbon deposits. This prevents the engine from operating at its optimal state, leading to shaking. Timely cleaning of engine carbon deposits, the throttle body, and fuel injectors can address this problem. Malfunctions in the Electronic Control System: Abnormal data from sensors such as the oxygen sensor, air flow meter, or camshaft position sensor can cause poor engine performance and shaking. Prompt repair at a service facility is recommended.