Understanding AFM in Your Chevy Silverado
Active Fuel Management (AFM) is designed to improve fuel efficiency by deactivating half of your engine’s cylinders during light loads. However, many Chevy Silverado owners have reported issues with this system, such as rough idling and decreased performance. If you’re considering an AFM delete, this guide will walk you through everything you need to know.
Why Consider an AFM Delete?
- Performance Issues: Some users experience a loss in throttle response and power due to AFM.
- Engine Wear: AFM can lead to increased wear on internal engine components.
- Tuning Options: Deleting AFM can open up more tuning options for your engine.
What You’ll Need
Before starting the AFM delete, here’s a list of tools and equipment you will need:
- OBD2 Scanner: To read and clear any codes.
- AFM Disable Device or Tuner: This can include a custom tune that eliminates AFM functionality.
- Basic Hand Tools: Wrenches, sockets, and screwdrivers for any necessary disassembly.
- Safety Gear: Gloves and safety glasses are recommended!
Steps to Perform AFM Delete
-
Check Your Warranty: First, ensure that deleting AFM won’t void your warranty. Check with your dealer if uncertain.
-
OBD2 Scanner: Plug in your OBD2 scanner and read existing error codes. Clear any pre-existing codes that could interfere with the process.
-
Choose Your Method: You can go for a handheld tuner (like the Cortex or DiabloSport) that has the option to disable AFM, or you can choose a custom tune from a reputable tuner.
-
Follow Tuner Instructions: If you are using a handheld tuner, follow the instructions provided. Generally, this will involve setting up specific parameters for your truck and selecting the AFM delete option.
-
Install the Tune: Upload the modified tune to your truck’s ECU. This should disable the AFM functionality.
-
Test Drive: After the tune is installed, take your truck for a spin! Pay attention to any changes in engine performance and listen for any unusual sounds.
-
Re-Check Codes: Use the OBD2 scanner again to check for any new codes after driving.
What to Expect After the Delete
- Improved Throttle Response: You may notice quicker acceleration and a more responsive feel.
- Reduced Engine Noise: Many users report a smoother and quieter engine after the AFM is disabled.
- Increased Power: You might feel a noticeable boost in power, especially under load.
Potential Drawbacks
Keep in mind that modifying your engine can lead to:
- Increased Fuel Consumption: AFM is designed to save gas, so without it, expect some changes in fuel economy.
- Potential for Engine Codes: Be prepared to troubleshoot if any check engine lights appear post-installation.
Conclusion
Deleting the AFM system can be beneficial for driving performance, especially if you’re not a fan of the way AFM behaves. Always do thorough research and weigh the pros and cons before making these changes. Happy modding!