What are the symptoms of carbon buildup in a car?

[EleanorLee]

Symptoms of carbon buildup in a car: 1. Difficulty starting the engine when cold, requiring multiple attempts, while normal when warm; 2. Unstable engine idling, fluctuating between high and low; 3. Poor acceleration when revving in neutral, with a sluggish feeling; 4. Lack of power during driving, especially noticeable when overtaking, with slow acceleration response and inability to reach the vehicle's original power; 5. Eye-irritating and pungent exhaust emissions, severely exceeding standards; 6. Increased fuel consumption compared to before. Methods to clean carbon buildup in a car: 1. Add fuel additives to improve gasoline combustion efficiency; 2. Regularly maintain the engine; 3. Change the engine oil periodically; 4. Clean and maintain the fuel system, spark plugs, and throttle body on a regular basis.

[TimothyLynn]

I've been driving for half my life and have experienced quite a few symptoms of carbon buildup. Starting the car often takes several attempts, which is especially frustrating when I'm in a hurry in the morning. At idle, the whole car shakes like it's dancing, with the seats vibrating, affecting driving comfort. Acceleration is particularly sluggish—even when I press the throttle hard, the speed doesn't pick up, making overtaking a nerve-wracking experience. Fuel consumption has also skyrocketed; I used to fill up twice a month, but now I need an extra half tank. The exhaust often emits black smoke and a burnt smell, noticeable even with the windows down. In severe cases, the engine produces knocking sounds, which are alarming and pose safety risks. These issues are mostly caused by using low-quality gasoline or frequent short-distance city driving. It's advisable to regularly drive on highways to clean the system or use fuel additives as a preventive measure—don't wait for minor problems to escalate.

[PaulRose]

I recently encountered carbon buildup in my car, and the symptoms were quite annoying. It was difficult to start, requiring multiple ignition attempts, and the car shook violently at idle, like riding a roller coaster. The acceleration was weak, with delayed throttle response, and fuel consumption increased significantly, costing an extra hundred or two per month. The exhaust was black and smelled unpleasant, making my friends complain when riding in the car. The driving experience was uncomfortable, especially in traffic jams, where the power drop was noticeable. This was related to my usual short-distance commuting, and I also blame myself for not paying attention to using good fuel. After inspection, the mechanic recommended cleaning the throttle body. Now I've learned my lesson and drive more on highways to keep the engine clean.

[ElenaFitz]

I think the typical symptoms of carbon deposits are manifested in starting hesitation, idle shaking, and sluggish acceleration. The engine has difficulty starting, noticeable body vibrations at idle, and slow acceleration response. Fuel consumption has increased, and the exhaust becomes black and smelly. Occasional knocking noises pose significant risks. Maintaining good driving habits can prevent this.