ModuleX | AFM Delete Tuning for GM & Chevy | Mobile ECU Programming
Restore full V8 power. Protect your engine. Drive like it should’ve been from the start & extend the life of your engine!
ModuleX provides professional Active Fuel Management deletes and tuning for GM/Chevy vehicles. Serving Arkansas. Book online today! We only use GM approved software and hardware! No warranty is voided!
What is Active Fuel Management?
Active Fuel Management (AFM) — also called Displacement on Demand (DOD) — is a system used in many GM/Chevy engines (2007–2020) that temporarily deactivates half of the engine’s cylinders under light loads to improve fuel economy. It switches your V8 into a V4 during highway cruising or idle conditions. Sounds good, right? The problem: The system relies on a complex set of components — including special lifters, oil pressure solenoids, and electronic controls — that are prone to failure over time.
--When Active Fuel Management is present it deactivates these four cylinders.
--Lifters found in these cylinders have been redesigned by GM so that the lifter is collapsible, leaving you in 4 cylinder mode.
--This effectively being wear damage is done to the camshaft and other internals.
Why delete Active Fuel Management?
❌ How AFM Damages Your Engine Over Time
When AFM activates and deactivates cylinders repeatedly, it puts uneven wear and stress on your valvetrain. Here’s how that hurts your engine:
⚙️ 1. Camshaft & Lifter Wear
AFM uses special “collapsing” lifters that deactivate certain cylinders.
These lifters rely on precise oil pressure and are known to stick, collapse, or fail over time.
When they fail, they can cause metal-on-metal contact with the camshaft.
This leads to flat cam lobes, misfires, ticking, and catastrophic engine failure.
💥 2. Unreliable Oil Pressure Behavior
AFM lifters require constant and precise oil pressure regulation.
Even slightly dirty oil or a weak oil pump can cause erratic behavior, misfires, and codes.
Over time, this makes the engine run worse, wear faster, and become unpredictable.
🔥 3. Performance & Throttle Lag
Switching in and out of V4 mode causes jerky transitions, sluggish throttle response, and poor towing behavior.
Many drivers report less control, especially in trucks under load.
🛠️ Why Deleting AFM Saves Your Engine
Deleting AFM removes the software controls that activate and deactivate cylinders. With a proper tune:
The engine stays in full-time V8 mode, just as it was originally engineered to run.
No more collapsing lifters, misfires, ticking, or valve damage from faulty transitions.
You avoid thousands in repair costs tied to camshaft or lifter failure.
You get consistent power delivery — especially important for towing, hauling, or highway driving.
💡 Bottom Line
If your vehicle has AFM, it's not a matter of if it causes a problem — it's when. A professional AFM delete using safe, software-based tuning:
✅ Extends engine life
✅ Protects your camshaft and lifters
✅ Prevents expensive engine repairs
✅ Delivers smoother power and throttle response
✅ Eliminates annoying V4-mode surging or bogging
Testimonials
What our customers write about us...
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Testimonial
⭐️⭐️⭐️⭐️⭐️ “I had no idea how bad AFM was messing up my truck. Jake at ModuleX explained everything, deleted it safely, and the difference was night and day. No more ticking, and it drives like new.”
Testimonial
⭐️⭐️⭐️⭐️⭐️ “I tow a small trailer often and that V4 mode was killing my performance. After the tune, I’ve got full power when I need it, and I don’t worry about engine failure anymore. Worth every penny.”