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So I just bought a 2016 corvette and am putting a axle back exhaust on. I had a 2017 camaro ss and did an exhaust and all I did with the afm valves was kept them plugged in and zip tied under the car, can I do that same thing with this corvette or do I need to order the afm valve simulators from awe or is that a waste of money? I ordered a range also to keep the car from going into v4 mode, does that change anything with the afm or nothing else besides keeping it out of v4?
So I just bought a 2016 corvette and am putting a axle back exhaust on. I had a 2017 camaro ss and did an exhaust and all I did with the afm valves was kept them plugged in and zip tied under the car, can I do that same thing with this corvette or do I need to order the afm valve simulators from awe or is that a waste of money? I ordered a range also to keep the car from going into v4 mode, does that change anything with the afm or nothing else besides keeping it out of v4?
I though you could disable the NPP exhaust va lives by simply pulling the fuse. Is that not correct?
AFM valves are separate from NPP. AFM are up front for V4 mode.
Disabling AFM Exhaust valves.
I have installed the "Range" device, and pulled fuse 87 (2019 GS). Doesn't the "Range" unit keep the AFM exhaust valve from actuating, or do I need to pull another fuse to deactivate that too? And would that generate a CEL?
Last edited by sharpseadog; Jun 30, 2021 at 12:04 PM.
Reason: Add more
Save time money, and no cutting or modding anything on the car, no cutting access or taping a unit somewhere under hood hiding wires. Follow this post. I did mine recently, love it. Totally concealed under front fuse box, removeable and works through my homelink buttons. Guys on here did a great job figuring this out.
Some of you are confusing the systems and what they do.
AFM - Active Fuel Management, this system uses special lifters that a solenoid controls oil flow to in order to allow the lifter to "collapse" and disable the cylinders when the vehicle drops into V4 mode. When the vehicle does this is causes non-normal exhaust pulses and noise. GM addressed this with a flapper valve in the early vehicles, then as we have seen in the 6th gen Camaro and now the C7 Corvette GM added AFM actuators to the exhaust as well.
As said if you remove the AFM actuators in the exhaust it will trip a check engine light. You either have to use the eliminators or else have the AFM actuators tuned out. The Range device doe not do a thing to the AFM actuators, the Range device merely tricks the ECM to not activating the AFM solenoid in the engine and thus keeps the lifters from collapsing and the vehicle going into V4 mode.
NPP - This is the dual mode exhaust system, those are the valve/actuators at the rear of the car by the mufflers. You can either unplug the valves, pull the fuse or adjust them thru the infotainment system. No matter what drive mode you set the NPP valves to, including track they will still close. Yes, even in Track mode the NPP valves will close under light throttle steady state driving. The only way to keep the NPP valves open all the time is to either pull the fuse for them, disconnect the actuators or else license the CCM module using HP Tuners and change how the NPP states operate.
Afm valve disable
