What are the harms of carbon deposits in car engines?
2 Answers
Once carbon deposits occur in a car engine, the following harms may arise: First: Difficulty in starting. Second: Engine stalling when coasting in neutral. Third: Engine stalling during gear shifts. During the gear shifting process, there is a brief moment when the transmission is in neutral; excessive carbon deposits can cause the engine to stall during this time. The formation of carbon deposits can be attributed to several reasons: First: Incomplete combustion of gasoline. Second: Frequent low-speed operation of the vehicle. After carbon deposits form in a vehicle, symptoms such as insufficient power, difficulty in cold starts, engine shaking, and increased fuel consumption may appear. To address carbon deposits, they can be removed by cleaning the fuel system.
What annoys me most about driving an old car is the issue of carbon buildup. Last time when climbing a slope, I clearly felt the throttle had no power, as if being dragged along. The fuel consumption also inexplicably increased by two points. The mechanic said it was all due to that layer of black sludge on the back of the valves. What I fear most is the car shaking like a sieve during cold starts, and in severe cases, the exhaust fumes can even bring tears to your eyes. When I went to the repair shop for an IV drip to clean the carbon deposits, the technician showed me the endoscope images—the piston tops were covered with scab-like carbon chunks. He said these things clog the combustion chamber and might even cause pre-ignition knock. Fixing it would require dismantling the engine, costing both money and time.
