Fuel injectors are the “small but mighty” players in your engine’s performance. As the name implies, they’re responsible for injecting fuel into the engine through a nozzle, which allows the gas to mix with air before it ignites. However, when injectors become clogged, it can keep your engine from running smoothly. Knowing how to clean fuel injectors and how to recognize when it’s time for a fuel injector replacement can prevent damage to your engine — and your wallet.