What Situations Will Occur When a Car Has Excessive Carbon Deposits?
2 Answers
When a car has excessive carbon deposits, the following situations may occur: Engine Shaking: The engine produces intermittent and regular shaking under idle conditions. Unstable Engine Idling: The engine speed fluctuates erratically, sometimes high and sometimes low, under idle conditions. Weak Engine Acceleration: When carbon deposits accumulate severely, the engine may experience weak and sluggish acceleration, accompanied by abnormal shaking and increased fuel consumption. Engine Knocking: When carbon deposits in the combustion chamber accumulate excessively, it can inadvertently increase the compression ratio of the engine cylinders. This may lead to premature combustion of the air-fuel mixture, resulting in knocking. Cylinder Scoring: If carbon deposits accumulate near the piston rings or if carbon deposits from the cylinder head or valves fall onto the piston rings, it can cause scoring of the engine cylinders. In severe cases, it may even lead to "seizure" of the cylinder.
After driving my car for a long time, carbon buildup causes problems. Last time, the engine idled roughly, shaking the entire body; acceleration was sluggish, and even pressing the throttle deeply resulted in slow speed—almost causing an accident when overtaking on the highway. Starting the car was particularly difficult, especially on cold winter mornings, requiring multiple ignition attempts. Fuel consumption also increased noticeably—previously, a full tank could cover about 500 km, but now it’s only around 450 km, burning through money faster. These symptoms are all related to carbon deposits, as they clog intake valves and fuel injectors, reducing combustion efficiency. Avoiding short trips and using high-quality gasoline can minimize carbon buildup. Recently, I tried a cleaning additive, and power improved significantly. I recommend early inspections to prevent safety risks.
