How to Solve the Shaking Issue of Honda Cars at 40-60 km/h?

[Brenda]

Honda cars shaking between 40 to 60 km/h is mainly caused by severe engine carbon deposits, ignition system failure, or oil pressure issues. Below are the detailed explanations: Severe Engine Carbon Deposits: Engine carbon deposits are the primary cause of car shaking. When there is excessive carbon buildup inside the engine, the gasoline sprayed by the fuel injector during cold starts is largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture and making the car prone to shaking during cold starts. Cleaning the carbon deposits can resolve this issue. Ignition System Failure: Excessive carbon buildup on the spark plugs or overly large ignition gaps can lead to ignition failure. Replacing the spark plugs can fix this problem. Oil Pressure Issues: Abnormal fuel pump supply pressure or incorrect readings from the intake pressure sensor can cause poor fuel pump performance, leading to car shaking.