tcinla

So There is a Diablo SPRINT ( not SPORT) s1000 device that is advertised by the mfr to not change any code/put a tune in. It's like the Range in that you plug it / unplug it at will :

https://www.diablosport.com/sprint-a...gement-module/

So has anyone used the Diablo ? The mfr site lists it as being compatible up to 2016 MY. Since 2017 isn't listed I take it both range and diablo are causing CEL's on 2017 C7s ?

Anyone know ?

Thunder22

Will know next week:

https://www.corvetteforum.com/forums...-question.html

Cosmo Kramer

I sent an email to Diablo and asked if there was a difference between their unit and Range's unit. They said it's the same unit just rebranded with Diablo's name on it.

50th year

Can't wait for your report Thunder! Maybe with all the adverse reaction with the V8 to V4 That the GM people on the forum will ask GM to give us a fix for this. I mean really Eco is there if wanted or needed. Keeping my fingers crossed

ExRedRacer

Foosh

Like all automakers, GM has to meet federal corporate average fuel economy (CAFE) requirement for every MY, which must be submitted and certified by EPA.

AFM is necessary for GM to meet their CAFE target. They can't remove it, but individual customers can. That's why aftermarket solutions were developed.

Patman

I still don't understand why GM can't have the AFM disabled in sport mode with the A8. Wouldn't that still satisfy the MPG requirements for CAFE as long as AFM is active in one of the modes (such as eco mode with the M7)?

tcinla

I wonder if gm changed their ECM code for 2017 which Range hasn't been able to figure out yet. I wonder if range cares...

NSC5

I doubt if the 2017 problem is markedly different from the same basic issue they had in 2016 with the Range module interfering with the large amount of network data at startup. Doesn't the Range work fine in a 2017 as long as it isn't activated until a few seconds after startup?

I experienced GM's own version of this problem a couple of times with my 2008 CTS (which had no adds on or modifications). A few times when starting up some of the audio modules timed out due to traffic so parts of the audio system didn't work. A restart would cure the issue.

Probably part of the Range issue in solving this is there are so many configurations of the C7 available (trim levels, options, maybe even user configuration choices are part of the impact) that it is difficult to test/characterize all possible environments.

Either starting the Range manually via a switch or automatically via the delay relay mentioned in other threads would be the most straightforward solution at this point. Or perhaps as I suggested in another thread if Range wants to keep it completely "plug and play" then add a circuit to sense the voltage drop that always accompanies the heavy draw from the starter motor and shut the Range off for 10 seconds when that sudden voltage drop happens. Then it could remain as a simple OBD-II plug in with no extra wiring or user modifications.