Which risk increases when electronically controlled diesel fuel injectors experience excessive back-leakage?

💡 Explanation

When injectors back-leak excessively, less fuel is delivered to the cylinder during injection because high pump pressure fuel is returned to fuel tank, leading low fuel condition. Therefore cylinder misfire increases, rather than other failures related to rich combustion, lean aftertreatment, or mechanical vibrations which do not stem directly from injectors back-leakage.

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