The Cm871 Ecm (Engine Control Module) controls various engine functions in heavy-duty trucks. Modifying this module, often referred to as “deleting” or “tuning,” can alter performance and emissions. This article explores options for accessing and modifying the CM871 ECM program.
DIY CM871 ECM Programming
For those comfortable with basic computer skills, programming the CM871 ECM can be a DIY project. This involves:
- Reading the ECM: Using specialized software and hardware, the original ECM program is read and saved as a backup.
- Modifying the Program: The saved file can be sent to a tuning specialist for modification or, with sufficient knowledge, adjusted directly. Common modifications include deleting emissions controls like DPF (Diesel Particulate Filter) and EGR (Exhaust Gas Recirculation).
- Writing to the ECM: The modified program is then written back to the ECM, overwriting the original factory settings.
This method offers cost savings and provides control over the process. Having a backup of the original ECM program is crucial for restoring factory settings if needed. A detailed guide on reading and writing ECM programs can be found here: http://rawze.com/forums/showthread.php?t…2#pid68742
Considerations for CM871 ECM Delete
When considering a CM871 ECM delete, additional modifications might be necessary:
- DPF and EGR Removal: Physically removing the DPF and EGR components is often performed in conjunction with ECM tuning to prevent error codes and ensure optimal performance.
- Crankcase Filter: Installing a maintenance-free crankcase filter can help manage increased oil blow-by that may occur after deleting emissions systems.
- EGR Block Plate: A block plate installed between the EGR cooler and the exhaust manifold further prevents exhaust gas recirculation.
It’s important to understand the legal and environmental implications of CM871 ECM deletes before proceeding. Regulations regarding emissions modifications vary by jurisdiction.
Conclusion
Modifying the CM871 ECM can offer potential performance benefits, but requires careful consideration and understanding of the process. A DIY approach is feasible for individuals with basic computer skills and access to the necessary tools and software. However, consulting with a qualified tuning specialist is recommended to ensure proper modifications and avoid potential issues. Remember to always back up the original ECM program before making any changes.
