What causes engine shaking in an Audi A6?
2 Answers
Audi A6 engine shaking is caused by severe carbon buildup, which can be resolved by cleaning the carbon deposits. The Audi A6 is a mid-to-large-sized 5-door, 5-seat station wagon with dimensions of 4951mm in length, 1886mm in width, and 1483mm in height, and a wheelbase of 2925mm. It has a fuel tank capacity of 73 liters. The Audi A6 is equipped with a 2.0T turbocharged engine and a 7-speed dual-clutch transmission, delivering a maximum power of 140 kW and a maximum torque of 320 Nm. It features front-wheel drive, with both front and rear suspensions using a five-link independent suspension system. The steering assistance type is electric power steering, and the body structure is a unibody design.
My Audi A6 also experienced engine shaking issues last year. When stopping at red lights, the steering wheel vibrated so badly that I couldn’t even place my phone steadily. A thorough inspection revealed several common problems: the spark plugs in the ignition system hadn’t been replaced after 60,000 km, and the excessive electrode gap caused a misfire; the hydraulic rubber mounts in the engine mounts had aged and cracked, completely failing to dampen vibrations; and a thick layer of carbon buildup on the back of the throttle body led to unstable air intake. During the repair, the mechanic used a borescope to check the carbon deposits inside the cylinders and recommended a walnut blasting cleaning. Now, I make sure to regularly maintain these areas every 50,000 km, especially since prolonged low-speed city driving and fuel quality can accelerate carbon buildup. Never ignore abnormal engine shaking—it can cause more expensive damage to engine components.
