Customer states: small vibration., Meanwhile the engine mount: , If your car shakes while idling, clunks when shifting, or feels rough while driving, your engine mounts could be failing., Bad What could be the cause of engine vibration when idling? Solve Rough Idle Now: Main Causes of Shaking at a Stop Why Does My Car Shake at Idle but Smooth Out While Driving? 10 Causes For Shaking Vibrating The Car Engine at Idle While Stopped Why Does Your Engine Vibrate at Idle? Noticing your engine shaking or vibrating while idling? This could mean something isn't right under the hood. Here's what might be causing it and how