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Which outcome occurs when thermal expansion compromises injector nozzle sealing?

A)Increased unburnt fuel hydrocarbon emissions
B)Optimized air-fuel mixture formation
C)Enhanced catalyst converter efficiency
D)Reduced engine coolant system load

💡 Explanation

Uncontrolled fuel leakage affects emissions; incomplete combustion occurs due to poor atomization. The mechanism is dribble injection because thermal expansion reduces nozzle tightness, therefore increased unburnt fuel leaves the combustion chamber rather than creating a precise even combustion.

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