What are the symptoms of excessive carbon deposits?

[GriffinFitz]

Symptoms of excessive carbon deposits: It will alter the original structural parameters of the engine, reduce engine power, increase fuel consumption, and in severe cases, it can also cause engine knocking, abnormal acceleration noise, damage to pistons and crankshafts, and even lead to engine oil burning, requiring major repairs. Methods to reduce carbon deposit formation in cars: 1. Use high-quality fuel, as the main components of carbon deposits are wax and gum deposits from the fuel, so the lower the gum content in the fuel, the better; 2. Avoid driving at low speeds for extended periods. If necessary, you can periodically drive at high speeds. The principle of high-speed driving to eliminate carbon deposits is to accelerate gas flow, which can remove a small portion of carbon deposits that are not firmly attached, and increase combustion temperature, allowing some carbon deposits in the cylinder to be burned.

[Cheryl]

I know exactly how carbon buildup feels. Last year after my car hit 50,000 kilometers, the problems started: severe engine shaking during startup that made the whole car tremble like an earthquake; noticeably weaker acceleration where pressing the gas pedal felt like stepping on cotton, with speed struggling to climb – overtaking became exhausting when it used to be effortless; fuel consumption skyrocketed from 8L/100km in the city to nearly 10L, hurting my wallet at every fill-up; unstable idle RPM with the needle bouncing around, sounding awful at red lights; and black exhaust smoke with a pungent plastic-burning smell that friends complained about. Prolonged carbon deposits don't just affect driving – they can wear engine components. I now do cylinder cleaning every two years and regularly drive at highway speeds, which helped significantly. Don't ignore these symptoms – early inspection saves major repair costs.

[StOwen]

My car had carbon deposit symptoms, which made driving quite troublesome. The specific manifestations included: the engine was particularly difficult to start, requiring multiple attempts to ignite on winter mornings; strong jerking during acceleration, with the car lurching when the accelerator was pressed, and uneven power output, especially noticeable when going uphill; fluctuating idle speed, with noticeable vibrations inside the car even when stationary; significantly increased fuel consumption, burning several more liters of fuel for the same distance, which added up to a considerable cost difference; exhaust had a burnt smell and was darker in color, making it stand out even when parked. Prolonged neglect of these issues would have increased repair costs. I added some fuel system cleaner and avoided too many short trips, and now it's running smoothly again. Regular maintenance is key.

[OHailey]

When there is excessive carbon buildup, the car's performance noticeably deteriorates. From my experience: the engine struggles to start, especially in cold weather; acceleration feels sluggish as if dragging a heavy load; idle speed becomes unstable, causing vibrations; fuel consumption increases significantly, wasting resources; and black exhaust smoke causes serious pollution. Timely treatment can protect the vehicle.

[StAthena]

I've experienced carbon buildup issues with obvious symptoms: engine shaking during operation, affecting smoothness; delayed acceleration response, feeling sluggish; increased fuel consumption by several percent, wasting resources; significant RPM fluctuations at idle; black smoke from the exhaust harming the environment. Carbon buildup is mainly caused by incomplete combustion. I recommend regular use of cleaning agents and taking long-distance drives as preventive measures.