You can tell if your motor has VVT by looking at the cover. You can see the camshaft phaser actuator on the top, and also a five pin harness at the bottom. If the motor does NOT have VVT, there will be no phaser, and the harness will be three pin.Oct 24, 2019
Vehicles that are available with Active Fuel Management include the Chevrolet Avalanche, Chevrolet Impala, Chevrolet Silverado, Chevrolet Suburban,Chevrolet Tahoe and Chevrolet TrailBlazer. Other automotive manufacturers offer similar variable displacement technologies.
Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. It is also known as Displacement on Demand (DoD) or cylinder deactivation.
The reason why the dealer can’t turn it off is because GM does not have a program that allows it, and if you get caught doing it with a aftermarket tune they CAN void your power train warranty.
The 6.0L Vortec Engines. … Like the rest of the Gen 3 truck engines, the LQ4 used a 24x reluctor wheel and a three-bolt cam and didn’t have AFM/DOD/VVT. In 2002, Chevy released a high output version of the 6.0 known as the LQ9 or Vortec Max engine.
|Trim Level||Engine||Fuel Management|
|Custom (all other variants)||5.3L V8 L82||No AFM|
|Custom Trail Boss||5.3L V8 L82||No AFM|
|LT||5.3L V8 L84||No DFM|
|RST||5.3L V8 L84||No DFM|
It is standard on all of the 5.3 engines.
After producing engines with AFM for a few years – and learning of oil consumption problems – GM developed a partial fix. … While this fix has decreased the volume of complaints about the AFM system, many GM vehicle owners are still experiencing excessive oil consumption.
When towing, accelerating or performing other strenuous tasks, the DFM system will remain off, giving the driver full engine power. DFM is the more advanced successor to AFM. Whereas AFM would flip between four and eight-cylinder mode, DFM shuts down certain cylinders based on the driving scenario.
Yes, M5 used with the tow/haul kills the AFM and is the best option, stock, for what I am doing.
The 4.8L is actually the same engine as the 5.3L, simply with less stroke and less displacement. The two engines tend to have similar problems, but the 4.8 Vortec comes in at a higher reliability rating on our scale due to its lack of AFM, which is known to cause problems on just about every engine it touches.
The Multi-Displacement System (MDS) is also a Chrysler-developed technology involving variable engine displacement. It is similar to the Active Cylinder Control, Active Fuel Management and Variable Cylinder Management technologies developed by Mercedes-Benz, GM and Honda, respectively.
The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU.
$895.00. We offer the INSTALLATION of Texas Speed & Performance AFM / DOD Delete Kit and the required Non AFM / DOD camshaft.
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The Dynamic Fuel Management system, therefore, could be improved. In the meantime, customers who don’t want to put up with this yet-to-be-matured technology can simply disable it with the Range Technology Disabler for AFM as well as DFM.
Only the L76 aluminum Vortec Max 6.0Ls had it. So the answer is… no. You do not have it.
The L96 6.0L in the 2500 is NOT an AFM motor. It does have VVT (Variable Valve Timing).
Active Fuel management (AFM) and Displacement on Demand (DOD) are the same thing: a system developed by General Motors that deactivates cylinders during periods of low engine load. It was used on certain 5.3L, 6.0L, and 6.2L engines starting in 2005 and continued until the release of late-model direct-injected engines.
afm will not turn on as long as you stay in manual shift mode.
You will need to turn off the AFM system using a computer programmer or custom tuning. It’s a little more work, but it’s recommended that you plug the pressure relief valve in the oil pan. It is also recommended that you switch to a standard-volume oil pump.
Most dealerships do not have the software to turn off AFM. Correct. Dealers can not “custom” modify your software nor would they want to.
Active Fuel Management saves fuel by using only half of the engine’s cylinders during some driving situations – such as highway cruising — and then seamlessly reactivates the other cylinders when a driver demands more power for acceleration, climbing a grade or hauling.
All 07 1500 silverado’s with 5.3 or 6.0 have AFM. If you dont care about AFM, you can disable it in the tune and do a cam swap as usual.
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