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← TechnologyWhich outcome occurs when an automotive gasoline direct injector (GDI) experiences nozzle coking?
A)Reduced fuel flow with abnormal spray pattern✓
B)Increased fuel pressure with lean combustion
C)Elevated exhaust temperature with catalytic converter damage
D)Decreased engine compression with valve damage
💡 Explanation
When GDI injectors experience nozzle coking, carbon deposits restrict the nozzle because high temperatures cause polymerization of fuel components, reducing fuel flow and distorting the spray pattern. Therefore, reduced fuel flow and abnormal spray results, rather than pressure increase, temperature elevation, or compression decrease which have other originating causes.
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