Range Device
Thread Starter
Instructor
Joined: Oct 2019
Posts: 180
Likes: 134
From: Kentucky
Range Device
I plug in my Range device before I start her up. At the end of the day after shutting off the engine for the last time I unplug it and lay it by my shifter. This reminds me to plug it in before I take her out. Does anyone leave their Range device plugged in all the time. I always put her on the trickle charger after every drive.
Popular Reply
Feb 21, 2026, 09:27 AM
Instructor
Joined: Mar 2025
Posts: 156
Likes: 213
From: Central Indiana
I leave mine plugged in.
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Team Owner
Joined: Jul 2004
Posts: 28,426
Likes: 3,277
From: Hartford WI
I plug in my Range device before I start her up. At the end of the day after shutting off the engine for the last time I unplug it and lay it by my shifter. This reminds me to plug it in before I take her out. Does anyone leave their Range device plugged in all the time. I always put her on the trickle charger after every drive.
Team Owner
Joined: Jul 2004
Posts: 28,426
Likes: 3,277
From: Hartford WI
Instructor
Joined: Jul 2023
Posts: 120
Likes: 81
From: Pennsylvania
Plugged in all the time.
Just remove it and drive a bit before its time for a State Emissions and Inspection.
We have those once a year in PA... some owners previously reported an issue when they unplugged it on the way to the inspection.
Driving a bit without it seemed to resolve the problem.
I follow that procedure and have not had a problem.
And I use a CTEK battery tender all the time.
Just remove it and drive a bit before its time for a State Emissions and Inspection.
We have those once a year in PA... some owners previously reported an issue when they unplugged it on the way to the inspection.
Driving a bit without it seemed to resolve the problem.
I follow that procedure and have not had a problem.
And I use a CTEK battery tender all the time.
Team Owner
Joined: Jul 2004
Posts: 28,426
Likes: 3,277
From: Hartford WI
A better alternative, IMO, is to use a Diablo programmer to stop it from switching into AFM mode. You can change stuff to get better suited to your tastes in the program. Maybe a little more aggressive timing/fuel curve to make it more lively? Sure, you can buy a throttle controller but you will loose some granular control of the throttle. I also got the A8 to shift better. I also don't kick the thing out of the car which can damage the OBD2 port like I have done twice already.
Best system would be the above PLUS replacement of the lifters and cam, to get rid of the weak spot altogether.
Best system would be the above PLUS replacement of the lifters and cam, to get rid of the weak spot altogether.
Race Director
Joined: Nov 2004
Posts: 15,678
Likes: 1,097
From: birmingham Alabama
St. Jude Donor '09 and '13
I plug in my Range device before I start her up. At the end of the day after shutting off the engine for the last time I unplug it and lay it by my shifter. This reminds me to plug it in before I take her out. Does anyone leave their Range device plugged in all the time. I always put her on the trickle charger after every drive.
Burning Brakes
Joined: Aug 2003
Posts: 775
Likes: 36
From: Nashville, TN
The Range AFM Disabler has been top of mind for me lately.
I have been contemplating getting it to prevent lifter issues for a couple a weeks now but waited to talk to some Corvette owners at a local Corvette Club I just joined. I talked to 3 C7 owners about this and each said it is not necessary and they don't worry about it. Then as fate would have it, the check engine light comes on during my drive home from the Corvette Club meet up!
So I go to Autozone for an immediate OBD scan and it comes out P12F0 - Cylinder Deactivation Exhaust Flow Valve Stuck Open Bank 1.
I guess I will find out next week when the dealer runs its diagnostics but I can't help but wonder if I had the the Range, would this have been prevented???
I just bought this car (2017 Grand Sport) as a Certified Pre-Owned from a Chevrolet dealer a month ago and now I am anxiously awaiting to hear how much this repair is going to cost. $300? $3,000?
@JLSuperfly If you don't use your Range, I would be happy to buy it from you!
I have been contemplating getting it to prevent lifter issues for a couple a weeks now but waited to talk to some Corvette owners at a local Corvette Club I just joined. I talked to 3 C7 owners about this and each said it is not necessary and they don't worry about it. Then as fate would have it, the check engine light comes on during my drive home from the Corvette Club meet up!
So I go to Autozone for an immediate OBD scan and it comes out P12F0 - Cylinder Deactivation Exhaust Flow Valve Stuck Open Bank 1.
I guess I will find out next week when the dealer runs its diagnostics but I can't help but wonder if I had the the Range, would this have been prevented???
I just bought this car (2017 Grand Sport) as a Certified Pre-Owned from a Chevrolet dealer a month ago and now I am anxiously awaiting to hear how much this repair is going to cost. $300? $3,000?
@JLSuperfly If you don't use your Range, I would be happy to buy it from you!
Instructor
Joined: Jul 2023
Posts: 120
Likes: 81
From: Pennsylvania
Sorry to hear what happened. Please let us know how this turns out.
Good luck, we're rooting for you.
Given the age of the C7, I'm surprised (and glad) you were able to buy it as a CPO.
Smart move.
Good luck, we're rooting for you.
Given the age of the C7, I'm surprised (and glad) you were able to buy it as a CPO.
Smart move.