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← TechnologyWhich effect occurs when a turbocharged gasoline engine experiences fuel injector failure causing lean combustion at high RPM?
A)Pre-ignition caused by hot exhaust valves✓
B)Detonation leading to piston damage
C)Fuel dilution of engine lubricating oil
D)Hydraulic lock due to excessive fuel
💡 Explanation
When fuel injectors fail, lean combustion occurs, creating elevated exhaust temperatures that heat the exhaust valves because unburned fuel is insufficient to control valve temperatures. Therefore pre-ignition results, rather than detonation, oil dilution, or hydraulic lock which require rich or normal combustion states.
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