What are the methods for removing carbon deposits from cars?

2 Answers
LaArthur
07/30/25 1:10am
Methods for removing carbon deposits from cars are as follows: 1. For mild carbon deposits: Simply add fuel additives. The oil-repellent molecules in fuel additives can lubricate the fuel system, making fuel injection smoother. 2. For severe carbon deposits: Clean components such as the throttle body and intake manifold. Generally, this involves removing the engine cover, taking off the throttle body, spraying it and the intake manifold with carburetor cleaner, and then wiping them clean. 3. Methods to prevent carbon deposits: Use clean fuel that meets the specified octane rating. You can add cleaning-type fuel additives when refueling, but make sure to choose reputable brands. Develop good driving habits, such as shifting gears in manual transmissions above 2000 RPM. Regularly drive at high speeds to allow the engine to run at high RPM and clear minor carbon deposits on its own. Avoid prolonged idling.
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DelaneyLynn
08/15/25 6:43am
I've been driving my own car for almost ten years and often encounter carbon buildup issues. A simple and effective method is to regularly add fuel additives, like pouring a bottle of cleaner into the fuel tank during refueling, which can dissolve carbon deposits in the fuel system and combustion chamber. Do this every 3,000 to 5,000 kilometers. High-speed driving is also a good solution—find a weekend to hit the highway and drive at over 3,000 RPM for half an hour to an hour, allowing the engine's high temperature to burn off the carbon deposits. For prevention, avoid prolonged idling and drive more often at mid-to-high RPMs to reduce carbon residue buildup. If the car starts shaking or fuel consumption increases, it might be necessary to visit a professional shop for equipment-based cleaning, such as walnut shell blasting for the intake valves—it’s thorough but more expensive. In short, developing these habits can maintain good car condition, saving money and ensuring safety.
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