Why does a car shake violently shortly after entering the highway?

1 Answers
SarahRose
09/05/25 3:38am
The reasons why a car shakes violently shortly after entering the highway: 1. Severe engine carbon deposits: The most common cause of car shaking is a dirty throttle body or excessive carbon buildup in the fuel injectors. 2. Ignition system issues: Check the working condition of spark plugs, high-voltage wires, and ignition coils. Poor performance of the ignition system or improper spark plug firing can also lead to such faults. 3. Unstable oil pressure: If you've already cleaned the engine carbon deposits, cleaned the throttle body, replaced the oil pads and spark plugs, but still notice body shaking at idle, it's recommended to visit a 4S shop to check whether the fuel supply pressure and intake pressure sensor are normal.
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