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Which outcome occurs when a gasoline direct injector nozzle experiences localized overheating due to carbon deposit buildup?

A)Uncontrolled pre-ignition of fuel
B)Fuel pump cavitation and failure
C)Reduced valve overlap and efficiency
D)Increased oil viscosity from fuel dilution

💡 Explanation

When injector nozzle overheats, autoignition temperature is reached because carbon acts as an insulator, triggering uncontrolled pre-ignition of fuel-air mixture before the spark. Therefore pre-ignition results, rather than pump cavitation, reduced valve overlap, or oil dilution which originate from different engine issues.

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