What causes the Audi A4L to experience weak acceleration accompanied by shaking?

[DiLondon]

Audi A4L experiencing weak acceleration accompanied by shaking can be caused by: carbon buildup in the car or substandard fuel. Here are the specific reasons: Carbon buildup in the car: Carbon deposits include cylinder carbon buildup, throttle carbon buildup, spark plug carbon buildup, intake carbon buildup, etc. These areas are directly related to the engine's power output. When there is excessive carbon buildup inside the engine, the car's ignition energy decreases, intake efficiency drops, ultimately leading to reduced engine power and resulting in shaking and weak acceleration. Substandard fuel: Using an incompatible fuel grade can cause the car's output power to decrease, leading to reduced performance. Alternatively, if the fuel tank vent is blocked, it may not meet the required fuel supply, resulting in a lean air-fuel mixture and weak engine acceleration.