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How to Remove Carbon Deposits from a Car?

5 Answers
DiLeonardo
07/24/25 5:43pm

Methods for removing carbon deposits from a car: 1. Use a fuel injection cleaner by cutting off the fuel supply and connecting the carbon deposit cleaner to the engine fuel injector, allowing the cleaner to soften the carbon deposits in the engine so they can be burned and expelled; 2. Disassemble and clean the engine intake manifold by removing it, scraping off stubborn carbon deposits, cleaning it, and then reinstalling it; 3. Drive more long-distance or high-speed trips, as the vehicle in a warmed-up state hardly produces any carbon deposit buildup, and the high-speed operation of the engine can expel some carbon deposits. Carbon deposits in the engine refer to a coking-like substance produced during the engine's operation when unsaturated olefins and gums in the fuel are exposed to high temperatures.

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VonTaylor
08/10/25 8:14am

I often deal with car carbon deposits myself by purchasing fuel additives and adding them to the fuel tank. I add the additive when the tank is empty, then fill it up with fuel, and drive at high speeds with high RPMs to ensure the engine burns more thoroughly and removes carbon deposits. Choosing well-known brands like XX works well, with noticeable effects in just one or two bottles—the car becomes more powerful and fuel-efficient. I also make sure to avoid short trips that can lead to carbon buildup. Not removing carbon deposits can cause hard starts and sluggish acceleration, so regular cleaning is important. The additive method is simple and time-saving, making it suitable for DIY enthusiasts at home. Checking the car's condition weekly helps maintain its health and prolong its lifespan.

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VonJune
09/26/25 2:29am

After years of driving, I've concluded that regularly driving on highways is the most effective way to remove carbon deposits. High engine RPM generates elevated temperatures, ensuring complete combustion and naturally clearing carbon buildup. I take a long-distance trip monthly to maintain smooth performance and consistent power. Carbon accumulation leads to increased fuel consumption and reduced power, making prevention better than cure. Using high-quality engine oil to maintain cleanliness is also crucial. Developing this habit keeps a decade-old engine like new, saving significant repair costs and enhancing driving safety. Additionally, pay attention to air filter maintenance to avoid impurities worsening carbon deposit issues—simple yet practical.

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CarolineAnn
11/09/25 4:32am

I'm too lazy to do it myself, so I just go to a professional repair shop for an IV cleaning. They use equipment to quickly handle it, getting rid of all the carbon deposits in just half an hour, and the car runs smoothly afterward. Modern technology makes it simple and efficient. Carbon deposits, if not removed, can affect emissions and lead to malfunctions. I do it every six months to ensure performance. The price is moderate, around a hundred yuan, hassle-free and suitable for working professionals who don't want to bother with it.

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AnaDella
12/30/25 6:17am

I save money by using high-quality gasoline to prevent carbon buildup. 95-octane fuel burns cleaner, and with regular oil changes, the engine has less carbon deposits. The car has been running for five years without major issues, with sufficient power and low fuel consumption. Carbon buildup comes from low-quality fuel, so I avoid cheap gas stations and choose reputable ones. Related maintenance includes changing the air filter to prevent the engine from inhaling dust. It's cost-effective, safe, and reliable for everyday driving.

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