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A fuel injector is a crucial component of an engine's fuel system that delivers fuel into the combustion chamber. It atomizes the fuel, ensuring efficient combustion, optimal engine performance, and reduced emissions.

Fuel injectors receive signals from the engine control unit (ECU) to open and close at precise intervals. When activated, they spray a fine mist of fuel into the combustion chamber, mixing it with air for efficient combustion.

Symptoms include rough idling, decreased fuel economy, increased emissions, and engine misfires. Addressing these issues promptly can prevent further engine damage.

Regular maintenance involves inspecting injectors for leaks or clogs, using high-quality fuel, and performing periodic fuel system cleanings to ensure optimal performance.