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← TechnologyWhich performance issue indicates a wastegate malfunction causing excessive turbocharger boost?
A)Uncontrolled engine knock and potential damage✓
B)Increased exhaust backpressure and reduced power
C)Delayed turbo response and poor acceleration
D)Elevated oil consumption and blue exhaust smoke
💡 Explanation
When a wastegate fails to regulate exhaust gas flow, excessive boost raises cylinder pressure causing uncontrolled detonation because the air-fuel mixture auto-ignites. Therefore engine knock and potential damage result, as opposed to backpressure, slow response or oil consumption that are from other turbocharger failure mechanisms.
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