What Causes Engine Idle Shaking That Stops When Accelerating?

[DeSabrina]

Reasons for engine idle shaking that stops when accelerating: 1. Changes in fuel injection quantity inevitably cause engine speed to fluctuate; 2. Faulty fuel pump pressure regulator or sensor leading to incorrect fuel injection correction signals; 3. Cracked vacuum booster hose; 4. Carbon buildup or dirt on the throttle body, or incorrect throttle position sensor alignment; 5. Faulty spark plugs; 6. Aging engine components. When starting the vehicle or idling with the engine running, noticeable body vibration typically indicates a dirty throttle body or excessive carbon buildup in fuel injectors. If slight body vibration or drift occurs while driving, this is usually caused by tire-related issues.