What are the symptoms of excessive engine carbon buildup?

[StWeston]

The symptoms of excessive engine carbon buildup are: It can alter the original structural parameters of the engine, reduce engine power, and increase fuel consumption; in severe cases, it may also cause engine knocking, abnormal acceleration noises, damage to pistons and crankshafts, and even lead to engine oil burning, requiring a major overhaul. Carbon buildup refers to: Residues left in the fuel injectors, throttle body, fuel lines, pipelines, or spark plugs due to incomplete combustion of fuel in the engine or the inability to fully burn the paraffin and gum in the fuel. Methods to treat car carbon buildup include: Adding fuel additives when refueling; disassembling and cleaning the engine; performing an engine carbon cleaning with a fuel system cleaner.