If you drive or maintain a Dodge Cummins diesel truck, injectors are one of the most critical components to keep an eye on. Dodge Cummins injectors are responsible for delivering the precise amount of fuel into the combustion chamber at the right time and pressure. When they’re working properly, your engine runs smoothly, powerfully, and efficiently. When they’re not, expect poor performance, rough idling, excessive smoke, or worse result in engine damage.