Which outcome occurs when a gasoline direct injector (GDI) experiences excessive carbon buildup on the nozzle tip?

💡 Explanation

When GDI nozzle tips have carbon buildup, poor spray atomization occurs because the fuel stream doesn't properly mix with intake air, leading to incomplete combustion. Therefore increased particulate matter emissions result, rather than reduced knocking, improved efficiency, or elevated catalyst temperature, which require different combustion properties.

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