Which outcome is most likely when a common-rail diesel engine experiences fuel injector back-leakage?

💡 Explanation

When a fuel injector experiences back-leakage, the pressure in the common rail drops more than intended because fuel is diverted away instead of being injected, leading to reduced injected fuel and misfire. Therefore, reduced injection results rather than increased temperature, overpressure, or increased efficiency which require other system malfunctions.

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