How to Clean Carbon Deposits in a Car?

2 Answers
Theresa
07/24/25 6:47am
To remove carbon deposits, the most direct method is to clean the engine. Leave some engine oil in the engine and then pour in a cleaning agent. Start the vehicle and let it idle for ten minutes to achieve the cleaning effect. The intake system also requires the use of a cleaning agent.
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DiElaina
08/11/25 2:33am
I often deal with the issue of carbon buildup in small cars. The most straightforward method is to add a fuel system cleaner to the gas tank and drive at high speeds, which can dissolve carbon deposits in the fuel injectors and intake manifold. Prevention is also crucial—avoiding prolonged idling and using high-quality gasoline can reduce carbon formation. If the carbon buildup is severe, manual cleaning is necessary, such as removing the throttle body and spraying it with cleaner, but this job is quite messy and requires tools and patience. Having driven for many years, I check the air filter during every maintenance session, and timely replacement can prevent carbon buildup. Don’t forget to occasionally rev the engine at high RPMs to burn off thin layers of carbon deposits. If the results are poor, take the car to a professional repair shop for thorough cleaning—they use walnut shell blasting or high-pressure equipment for safe and complete removal. Paying attention to these small habits can extend your car’s lifespan.
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