Mitsubishi Lancer rough idle and acceleration issues with RPM struggling above 3500 resolved by replacing fuel pump relay on Mitsubishi Lancer

Some Mitsubishi Lancer owners report experiencing rough idle and acceleration issues, particularly with RPM struggling above 3500. These problems can manifest as fluctuating RPMs during acceleration, which may indicate underlying fuel system or engine component issues. Additionally, a rough-running engine may exhibit symptoms such as unstable idling, stalling, and poor acceleration, potentially caused by faulty spark plugs or dirty fuel injectors. The fuel pump relay is crucial for the fuel system's proper functioning, and its failure can lead to RPM fluctuations and starting difficulties. Addressing issues with the fuel pump relay may help restore engine performance and resolve these rough idling and acceleration struggles.