What might happen if the injector pulse width is set incorrectly?

Setting the injector pulse width incorrectly can lead to inadequate fuel delivery, which may fail to meet the engine's specific requirements for optimal performance. Each engine has a specific fuel-to-air ratio that it needs to maintain for efficient combustion, and the pulse width directly affects how much fuel is delivered to the engine at given intervals. If the pulse width is too short, not enough fuel will be injected, leading to lean conditions that can result in poor performance, increased engine temperatures, and potential engine knock. Conversely, if the pulse width is too long, it can cause excessive fuel delivery, which can also lead to performance issues, fouling of spark plugs, and increased emissions. Therefore, ensuring that the injector pulse width is accurately set is crucial for maintaining proper fuel delivery and overall engine performance.