The factory throttle valve in your 6.7L Cummins engine plays a crucial role in the EGR (Exhaust Gas Recirculation) system. It regulates the mix of fresh air and recirculated exhaust gases entering the engine. With the EGR system intact, this valve adjusts the air intake ratio. However, when you perform an EGR delete, this valve becomes a potential liability.
When the EGR system is removed, the throttle valve loses its function of controlling exhaust gas flow. With no alternative air source, a closed or partially closed throttle valve effectively chokes the engine by restricting the intake air supply. Most EGR delete tunes disable the throttle valve’s operation and disconnect the actuator.
However, the possibility of the throttle valve unintentionally closing, even when unplugged, still exists. This can lead to significant issues, ranging from power loss and engine shutdown to catastrophic engine damage at high RPM. Even in its open position, the factory throttle valve can disrupt smooth airflow within the intake system.
A Throttle Valve Delete eliminates this potential problem. By removing the valve completely, you ensure unrestricted airflow and prevent any chance of unintended closure. This upgrade provides peace of mind and optimizes performance after an EGR delete. For 6.7L Cummins owners, the throttle valve delete is the crucial final step to a complete and worry-free EGR delete.
By installing a throttle valve delete kit, you are preventing a potential failure point and ensuring consistent engine performance. This relatively simple modification ensures optimal airflow, safeguarding your engine from potential damage and maximizing the benefits of your EGR delete. It’s a small change that makes a big difference in the long run.
