Deleting the Active Fuel Management (AFM) system in Chevrolet 5.3L engines is a popular modification. This article outlines a cost-effective method to perform a Dod Delete Obd2, focusing on a personal experience with successful results. The process involves removing the AFM program from the Engine Control Module (ECM) and addressing potential lifter collapse issues.
ECM Programming and Lifter Repair
The core of this DOD delete OBD2 solution lies in having the AFM program deleted from the ECM. This was accomplished through a purchased tuning service. Following the ECM update, a collapsed lifter required attention. A custom tool was fabricated to release the stuck lifter, although purchasing a readily available tool is recommended for convenience. Additionally, an oil plug was installed to block oil flow to the riser solenoids, further disabling the AFM system.
Step-by-Step Lifter Release Procedure
After the ECM reprogramming, it’s crucial to address any potential lifter issues. Here’s a detailed guide:
-
Manual Engine Rotation: Before attempting to release the lifter, manually rotate the engine until the affected lifter reaches its lowest point. This ensures proper positioning for the release process.
-
Rocker Arm Adjustment: Loosen the rocker arm to allow the lifter sufficient travel when it returns to its expanded position. This prevents binding and ensures proper operation.
-
Lifter Release: Utilize a lifter release tool to carefully expand the collapsed lifter. This tool applies pressure to the lifter, forcing it back into its operational state.
-
Pushrod Inspection: Once the lifter is expanded, remove the rocker arm and inspect the pushrod for any bending. Roll it on a flat surface to check for straightness. Replace if necessary.
-
Lifter Locking: Gently tap the pushrod into the lifter to ensure it’s securely locked in its expanded position. A plastic-handled screwdriver against the lifter, struck lightly with a hammer, can be used for this purpose.
-
Manual Engine Rotation (Verification): After reassembling the rocker arm, manually rotate the engine several times to confirm proper lifter movement throughout its range of motion. This crucial step verifies the repair before starting the engine.
Results and Recommendations
Post-procedure, the truck experienced significant performance improvement and a reduction in oil consumption. This DOD delete OBD2 method offers a budget-friendly alternative to more expensive solutions. The total cost for this DIY approach was approximately $150, including the ECM programming, oil plug, and custom tool fabrication. For those seeking a reliable and affordable way to address AFM issues in their Chevy 5.3L, this method is highly recommended.
