Which outcome results when a gasoline direct injection (GDI) engine experiences fuel injector dribble at shutdown?

💡 Explanation

When GDI injectors dribble after shutdown, unburned fuel puddles on the closed intake valves, leading to carbonization as the engine cools due to fuel decomposition. Therefore carbon deposits form on the valves, rather than overheating, wear or cavitation which are influenced by different failure mechanisms, such as misfiring or pump failure.

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