Which outcome results when an engine's fuel injector nozzle gets coked due to excessive heat and unburnt fuel?

💡 Explanation

When an injector nozzle is coked, fuel flow is restricted and uneven because carbon deposits block the injector, disrupting the spray pattern leading to inefficient combustion. Therefore misfire and rough running will occur, rather than output increase, emissions reduction, nor temperature reduction which require proper fuel metering.

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