What could be a direct effect of an injector leaking fuel?

A direct effect of an injector leaking fuel is indeed decreased fuel efficiency and potential engine flooding. When an injector leaks, it allows an excessive amount of fuel to enter the combustion chamber. This surplus leads to incomplete combustion, as the air-fuel mixture becomes too rich. Consequently, the engine struggles to use fuel efficiently, resulting in increased fuel consumption and reduced efficiency.

Additionally, if the fuel enters the chamber too rapidly, it can create conditions where the engine may flood, leading to difficulty starting the engine or causing stalling. This combination of decreased efficiency and potential flooding directly impacts overall engine performance and operation, emphasizing the importance of properly functioning injectors for maintaining optimal fuel usage and engine health.