Which outcome occurs in a turbocharged gasoline engine when fuel injectors deliver insufficient fuel despite high airflow?

💡 Explanation

When fuel injectors under supply fuel in a turbocharged engine, the air-fuel mixture becomes excessively lean, promoting auto-ignition and engine knock because the high temperatures & pressures prematurely ignite the mixture. Therefore engine knock results, rather than black smoke, converter overheat or turbo failure, which are typical of rich mixtures or mechanical faults.

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