What happens when your injector is going out 1999 5.9 cummins?

When an injector in a 1999 5.9 Cummins engine begins to fail, you may experience symptoms such as rough idling, decreased fuel efficiency, excessive smoke from the exhaust, and a loss of power during acceleration. The engine may also exhibit increased noise and vibrations due to improper fuel atomization. If left unaddressed, a failing injector can lead to more severe engine damage and potential injector failure, necessitating costly repairs. It's advisable to diagnose and replace any malfunctioning injectors promptly to maintain engine performance.