What is a common consequence of excessive fuel injection?

Excessive fuel injection leads to a situation where more fuel is delivered into the combustion chamber than can be effectively burned by the engine. This surplus of fuel can create several issues, one of the most significant being engine flooding. When an engine is flooded, the excess fuel can prevent the proper air-fuel mixture needed for combustion, resulting in poor engine performance, including rough idling and misfires.

This condition often manifests as difficult starting, stalling, and uneven running, as the combustion process is disrupted. The engine may struggle to maintain a steady idle, leading to vibrations and a lack of power delivery. Flooding can also cause an increase in carbon deposits, leading to further performance deterioration over time. Recognizing and addressing excessive fuel injection is critical for maintaining engine health and performance.