What are the symptoms of valve carbon buildup?

[SanBella]

There are many symptoms of valve carbon buildup in cars, mainly including abnormal engine shaking, fluctuating engine speed at idle, increased fuel consumption, reduced power, difficulty starting, etc. Here are the detailed symptoms: Abnormal engine shaking: When there is excessive carbon buildup on the car valves, it affects the fuel delivery and ignition in the engine. Since the fuel and air mixture cannot burn properly, it leads to abnormal engine operation, resulting in engine shaking. Increased fuel consumption: Due to excessive carbon buildup on the valves, the fuel in the engine cannot be fully utilized, leading to fuel wastage and consequently increased fuel consumption. Reduced power: If the vehicle experiences reduced power or fails to accelerate when pressing the gas pedal, in most cases, it is caused by carbon buildup on the throttle valve. Difficulty starting: There are many reasons for difficulty starting a car, including excessive valve carbon buildup, spark plug failure, insufficient fuel, etc. Specific causes need to be thoroughly inspected.