RANGE AFM device
Pro
Joined: May 2021
Posts: 500
Likes: 433
From: Queen Creek, AZ
That problem has been resolved by Range in the newer programming. And while we're on the topic I see that Diablosport is now offering their own version of the Range unit. In fact, with the exception of the logo, the units are identical. I would still opt for the original Range but if Diablo is picking up on it, that tells you something. Take a look: Marathon Active Fuel Management Module Gasoline and Diesel Tuning Systems | Diablosport
Last edited by AZRenegade; Aug 4, 2021 at 10:39 AM.
Le Mans Master
Joined: Dec 2000
Posts: 5,348
Likes: 3,319
The Diablo unit does the opposite of the Range, it enables AFM. Amusing.
"Enables vehicles with AFM to drop cylinders in order to suit the driver\'s power requirements, while conserving fuel.
Saves fuel by allowing vehicle to stay in 4-cylinder mode 80% of the time as opposed to only 35% from the factory."
"Enables vehicles with AFM to drop cylinders in order to suit the driver\'s power requirements, while conserving fuel.
Saves fuel by allowing vehicle to stay in 4-cylinder mode 80% of the time as opposed to only 35% from the factory."
Pro
Joined: May 2021
Posts: 500
Likes: 433
From: Queen Creek, AZ
Le Mans Master
Joined: Feb 2010
Posts: 7,798
Likes: 314
From: Santa Fe Tx
Yes
I hate having a 8cyl run on 4cyl. Makes no sense in a sports car. How many folks get a Vette for Gas Mileage?
My opinion is the AFM also contributes to the Transmission shudder issue??
I hate having a 8cyl run on 4cyl. Makes no sense in a sports car. How many folks get a Vette for Gas Mileage?
My opinion is the AFM also contributes to the Transmission shudder issue??
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Intermediate
Joined: Aug 2020
Posts: 49
Likes: 8
From: Murphy Texas
Everyone has their opinion. To get to the true facts on installing and removing a Diablo tune for warranty work you need to talk to the people that manufactures them, Diablo.
They will walk you thru the process and explain how it works so it isn't detected when you need to take your car in for warranty work. Just flash it back to stock before you take it in to GM.
It still is the best way to turn off AFM thru the ECM computer, not by tricking the system every time you start the car. Ever notice that you have to unplug the Range for a couple of weeks before getting an inspection? Thats because the Range is constantly clearing all the DTCs every time you start the car. This 'feature' removes all the DTCs that you would need to troubleshoot an issue with the car.
The Diablo does not clear DTCs every time you start the car. It just sets the AFM 'switch' inside the ECM to off just like driving a M7, out of Eco mode, or a A8 in manual mode.
They will walk you thru the process and explain how it works so it isn't detected when you need to take your car in for warranty work. Just flash it back to stock before you take it in to GM.
It still is the best way to turn off AFM thru the ECM computer, not by tricking the system every time you start the car. Ever notice that you have to unplug the Range for a couple of weeks before getting an inspection? Thats because the Range is constantly clearing all the DTCs every time you start the car. This 'feature' removes all the DTCs that you would need to troubleshoot an issue with the car.
The Diablo does not clear DTCs every time you start the car. It just sets the AFM 'switch' inside the ECM to off just like driving a M7, out of Eco mode, or a A8 in manual mode.
Melting Slicks
Joined: Aug 2009
Posts: 3,067
Likes: 2,177
From: Schaller Iowa
I purchased my '19 with just under 6500 miles and immediately put in a Range device, ditto for the '16 with 3000 miles. I'd like to think there wasn't enough damage done in 6500/3000 miles to cause problems later on as I plan on keeping these beasts for awhile.
Le Mans Master
Joined: Oct 2012
Posts: 6,391
Likes: 1,454
From: South Dakota
Buy directly from the Range site for the latest version of programming and read this: The real reason why Corvette C7 Stingray uses steel torque tube and why this signifies the fundamental failure of the new car | corvette c7 stingray and Z06 exposed (wordpress.com)
Pro
Joined: Mar 2014
Posts: 533
Likes: 271
From: Indianapolis, IN
Racer
Joined: Oct 2018
Posts: 256
Likes: 108
From: Texas
edit: I went driving around with Diablo/93 Octane. Trans-Firm and AFM/DOD off and it to me feels much better than range, there so far is no RPM spike, it drives and shifts much smoother so far.
Last edited by MyDarkAngel; Aug 6, 2021 at 10:43 PM.
Racer
Joined: Oct 2018
Posts: 256
Likes: 108
From: Texas
I have been driving my car after I installed the tune like I said and it seems a much better choice to me over range. It feels a lot smoother from a transmission shift standpoint and the RPM's stay stable. I think in my opinion it is much better, I think I will keep the tune and have the range as backup if something happens.
Pro
Joined: May 2021
Posts: 500
Likes: 433
From: Queen Creek, AZ
I have been driving my car after I installed the tune like I said and it seems a much better choice to me over range. It feels a lot smoother from a transmission shift standpoint and the RPM's stay stable. I think in my opinion it is much better, I think I will keep the tune and have the range as backup if something happens.
Racer
Joined: Oct 2018
Posts: 256
Likes: 108
From: Texas
Yea I know they are not the same and my warranty has been expired. The range did its job but the tune to me feels better especially since I can firm up the trans too. I mentioned what I was doing and others wanted to see the results so I told them. Like I said my warranty has expires so both options are open to me and probably many other people.
Pro
Joined: May 2021
Posts: 500
Likes: 433
From: Queen Creek, AZ
Diablo is good stuff. I've tuned a couple of my Sierra's using Diablo tunes. Never had an issue. If my Stingray were out of warranty, I would probably consider using Diablo myself. But I have a few years before I have to make that call.
By the way, if you haven't done so already, contact Diablew (Lewis Eaton). It's been years but if he is still in business, he does personalized tunes for your specific vehicle. He did mine and they really improved the performance of my 5.3 Sierras.
By the way, if you haven't done so already, contact Diablew (Lewis Eaton). It's been years but if he is still in business, he does personalized tunes for your specific vehicle. He did mine and they really improved the performance of my 5.3 Sierras.
Last edited by AZRenegade; Aug 8, 2021 at 01:16 PM.
Racer
Joined: Oct 2018
Posts: 256
Likes: 108
From: Texas
I picked Diablo when I saw the fact I could turn off AFM, the rest of the help is just gravy to me. I have used Diablo before on my C6 and my mustang so I knew they were good to go. If I was still in warranty I do not know if I would go with the tune over range but since I am out of warranty I can choose tune.
Burning Brakes
Joined: Oct 2005
Posts: 924
Likes: 161
From: Atwater CA
2024 C7 of the Year Finalist - Unmodified
It must be good because they won't ship it to California! A friend of mine had his shipped to a friend in Arizona who shipped it to CA. It was well worth the trouble