Which outcome occurs when an internal combustion engine fuel injector's needle valve sticks in the open position?

💡 Explanation

When a fuel injector needle valve sticks open, continuous unregulated fuel flow occurs because the metering normally controlled by the engine's control unit is bypassed, resulting in exceedingly rich fuel-air mixture. Therefore, uncontrolled fuel enrichment results, rather than increased temperatures, pressure drops or converter failures, which require distinct triggering faults.

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