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Corvette
C7 Forum
Range Technology Plug & Play AFM/DFM Active Fuel Management Disabler
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<blockquote data-quote="cdnrx1" data-source="post: 277191" data-attributes="member: 2880"><p>Just to be clear, AFM, when activated and the engine is operating in V4 mode, deactivates the intake and exhaust valves and the fuel injectors on the designated cylinders. As such there is no fuel delivery to those cylinders so there is no situation where running in V4 mode would use more fuel that when the engine is operating in V8 mode.</p><p></p><p>WPGZ06's statement is correct and no amount of switching from V8 to V4 mode or "lugging" the engine would change the fuel delivery to the deactivated cylinders. If the ECU was to deliver more fuel during V4 operation, this would defeat the entire purpose of the AFM system.</p><p></p><p><a href="https://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-active-fuel-management-cylinder-deactivation-technology/" target="_blank">This</a> is a thorough explanation of the C7's AFM system.</p><p></p><p>Hope this helps.</p><p></p><p>Best regards</p><p>Ross</p></blockquote><p></p>
[QUOTE="cdnrx1, post: 277191, member: 2880"] Just to be clear, AFM, when activated and the engine is operating in V4 mode, deactivates the intake and exhaust valves and the fuel injectors on the designated cylinders. As such there is no fuel delivery to those cylinders so there is no situation where running in V4 mode would use more fuel that when the engine is operating in V8 mode. WPGZ06's statement is correct and no amount of switching from V8 to V4 mode or "lugging" the engine would change the fuel delivery to the deactivated cylinders. If the ECU was to deliver more fuel during V4 operation, this would defeat the entire purpose of the AFM system. [URL='https://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-active-fuel-management-cylinder-deactivation-technology/']This[/URL] is a thorough explanation of the C7's AFM system. Hope this helps. Best regards Ross [/QUOTE]
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Corvette
C7 Forum
Range Technology Plug & Play AFM/DFM Active Fuel Management Disabler
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