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AFM technology is used in V6 or V8 engines to prevent excessive fuel consumption, hence improving fuel economy. Active Fuel Management System is also called Displacement On Demand as it cuts off the combustion from two or four cylinders when less power is required, thus reducing the net displacement of pistons in the engine.
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This technology, also known as Displacement on Demand (DoD) or cylinder deactivation, is a proprietary system developed by General Motors (GM) to enhance fuel efficiency by deactivating half of the engine's cylinders under light-load conditions. But what does AFM mean for your truck's performance, and why might you consider disabling it?
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Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors.It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy.Estimated performance on EPA tests shows a 5.5-7.5% improvement in fuel economy.
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In addition to keeping your truck in full power 100 percent of the time, the Range AFM/DFM Disabler simply plugs into your OBD-II port and instantly defeats the Active Fuel Management or Dynamic.
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The AFM system, or Active Fuel Management system, is used to limit the power of a GM 6-cylinder or 8-cylinder engine and help increase its fuel economy. The system itself is activated when the engine reaches certain perimeters, such as a cruising highway speed. This allows a 6-cylinder and 8-cylinder engine to run on only four cylinders.
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29 by Jonathan Lopez — Sep 15, 2021 Sponsored Links General Motors employs a number of different technologies to boost fuel economy, but one of these technologies, namely Active Fuel Management.
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This AFM module is a reliable choice for deactivating the Active Fuel Management on Flex Fuel, Vortec, and LS small-block engines. It allows GM trucks to stay on the V8 mode and doesn't mangle the ECU. The disabler is also suitable for high-load applications such as towing and off-road driving.
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Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that shuts down half of the engine's cylinders in light driving conditions to improve.
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In summary, AFM is basically a fuel management system that reduces fuel consumption by shutting off half the cylinders of an engine. In theory and testing, AFM proved to be successful. The Chevy trucks with active AFM were able to reduce fuel consumption by 5 to 7 percent. With long periods of use, however, problems started to arise.
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Active Fuel Management, also known as "displacement on demand" is a fuel-saving technology that can turn off fuel delivery to a portion of an engine during light load. In the case of the Silverado and Sierra, it can turn the 5.3L V8 into a 2.65L four-cylinder engine when the right circumstances are met.
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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. How Does AFM Affect Performance?
• How do I know if my truck has AFM? EcoTec3 5.3L
AFM stands for Active Fuel Management, a technology developed by General Motors to reduce fuel consumption and emissions in their Chevrolet truck models. AFM uses eight cylinders when power is needed and four cylinders during light-load driving conditions, improving fuel economy by up to 10%.
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AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. It essentially turns your V8 engine into a V4 which saves fuel. GM claims fuel improvements ranging from 5%-15% depending on the engine.
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The AFM is a system that shuts half of your car/truck's cylinders down when you're driving under light-load condition. The less number of cylinders are being activated, the less fuel is going to be used. Why Should You Disable AFM? No tech piece we see around is perfect. More or less, something will always be missing.
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One is for start/stop and the other is for AFM." Another covers Hemi cylinder deactivation, and a fourth is designed to eliminate the start/stop function in a wide range of Ford applications. "It's just a plug that goes into your OBDII port, and all it does is interrupt the signal from the PCM to the engine to activate that system.
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Here are some of the Chevy AFM problems that plagued my Chevy Silverado truck: 1. Excessive Oil Consumption. Excessive oil consumption was the most serious problem for Chevys from 2007 to 2011 years. For warranty purposes, GMC usually considers it excessive oil consumption when the engine uses more than 1 quart of oil in 2000 miles or less.