How can a fuel leak impact a metering system?

A fuel leak significantly impacts a metering system by causing lower fuel delivery, which can lead to engine misfires. When there is a leak, less fuel reaches the engine than intended. This insufficient fuel supply can disrupt the combustion process, resulting in misfires that may manifest as rough idling, stalling, or decreased overall engine performance. Additionally, a fuel leak presents an increased risk of fire, as fuel can vaporize and create flammable mixtures in the presence of an ignition source. This combination of decreased fuel delivery and heightened fire risk underscores the critical nature of maintaining an airtight and properly functioning fuel metering system. The other options do not accurately capture the severe consequences of a fuel leak on the functionality and safety of the metering system.