WHY YOUR CAR SHAKES WHEN IDLING If your car feels smooth while driving but starts vibrating or shaking at a stoplight, something isn't right. At idle, the engine runs at its Amazon.com: TC Electronic SHAKER MINI VIBRATO Ultra Compact Vibrato Pedal with Built In TonePrint Technology : Everything Else What Are the Signs of Drivetrain Problems? Auto Excel NPD: TC Electronic Shaker + First Pedalboard : r guitarpedals TC Electronic Shaker Mini Vibrato Mini Cooper Excessive Vibration At Idle? Do This First