Is it normal for the Audi A4 engine to shake when starting?
2 Answers
Audi A4 engine shaking when starting is not normal. The reasons for engine shaking include: excessive carbon buildup in the cylinders, throttle, spark plugs, intake system, and engine. Taking the 2021 Audi A4 as an example, it belongs to the mid-size car category, with body dimensions of: length 4762mm, width 1847mm, height 1436mm, wheelbase of 2825mm, fuel tank capacity of 54 liters, and curb weight of 1665kg. The 2021 Audi A4 is equipped with a 2.0T turbocharged engine, with a maximum horsepower of 204PS, maximum power of 150kW, maximum torque of 320Nm, paired with a 7-speed dual-clutch transmission.
My Audi A4 has been running for almost five years now. It's completely normal for the engine to shake slightly for a second or two when starting, just like stretching after waking up. But if it shakes as violently as a phone in vibration mode, or can't stabilize for more than ten seconds, then there's likely a problem. The most common causes are aging spark plugs or excessive carbon buildup, especially if you frequently drive short distances in the city, which can clog the throttle. Last time my car shook so badly that even the coins in the center armrest were jumping, and the inspection revealed a faulty ignition coil. Cold starts make the shaking more noticeable. If you also see black smoke from the exhaust or a sudden increase in fuel consumption, it's best to quickly read the fault codes and check the fuel injectors and cylinder pressure. Don't let minor issues escalate into an engine overhaul.
