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7 Best Fuel Injector Cleaning Kits: Reviews, Buying Guide and FAQs 2023

Is Carbon Buildup a Problem With Direct-Injection Engines?

Excessive carbon buildup tends to occur in many direct injection engines. Unlike port injection, direct injection sprays fuel directly into the combustion chamber instead of washing over the intake valves, allowing carbon to build. Carbon buildup restricts the airflow in the combustion chamber, causing imbalances in the air fuel mixture. Walnut blasting has become a popular remedy to remove carbon buildup from valves. The intake is removed, and walnut shells are propelled into the intake port by