Why does the car shake while driving?
2 Answers
Car shaking while driving is caused by poor idle operation. Here are the relevant details: Poor idle operation: Possible causes include unstable idle speed with engine vibration, idle speed exceeding the specified upper limit, idle speed dropping below the specified lower limit, or rough idle operation. These phenomena may be related to malfunctioning components such as fuel injectors, oxygen sensors, air flow sensors, EGR valves, or issues with control circuits and vacuum line connections. Solutions for car shaking: When vehicle shaking occurs, first inspect the throttle body and fuel injectors. If excessive dirt is found on the throttle body or carbon buildup on fuel injectors, they should be cleaned promptly.
As someone who frequently tinkers with cars, I've encountered numerous cases of vibration. Common causes include unbalanced or worn tires, which can cause noticeable body shake while driving; engine misfires leading to unstable operation in a cylinder, often triggered by aging spark plugs or faulty ignition coils; bent drive shafts or worn universal joints may also transmit vibrations; and loose suspension components, such as leaking shock absorbers or damaged ball joints. For safety, I recommend starting with a tire inspection to check for irregular wear or abnormal pressure; if the issue persists, investigate the engine control system or drivetrain components. Don't underestimate vibrations—they may indicate deeper underlying issues, and timely repairs can prevent major failures. Regularly performing wheel alignment and dynamic balancing is a good practice.
