Installed a New Driver Info Center Next Day. LOVE IT
- Thread starter Lightning 95
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
PG01
Supporting Member
Uhg, do a search on here. Active fuel management.... shuts of 4 cylinders to save gas. Kills lifters and cams.... terrible terrible terrible
Ron C
Full Access Member
Ah, that, I heard "these Vortex engines" have that, is that something that just works by default, or does it need to be activated?
PG01
Supporting Member
I would guess they may have tuned it out with ppv/ssv tune(do they tune those diff from civilians) but i would guess that the engine internals are still there. Leave the dic on that setting an go for a ride and eyeball the info, especially on a down hill that you take your foot off the gas and see if the v8 goes to v4.
Ron C
Full Access Member
I'll try that. I do know they 'tune' them differently. In the 'specs' I read that there is a "federal emissions exempt" for a lot of those vehicles, resulting in 10% more HP and 10% less fuel usage.
RPOs:
NC7: EMISSION SYSTEM,FEDERAL OVERRIDE
There are a few more emission RPOs
CrashTestDummy
Full Access Member
All the NC7 code does is basically default the emission system configuration to the more stringent system, like what is installed in Ca, NJ, Maine, etc. So if your vehicle has the California emissions RPO code, YF5, it is exempt from the federal emissions, since it is Ca. compliant, which is more restrictive. Merely a 'book keeping' thing:
http://www.gmfleet.com/content/dam/gmfleet/global/master/nscwebsite/en/Home/Resources/01_images/2015-model-emissions-bulletin.pdf
While the tune may be different between the federal and Ca., etc., tunes, ALL of them, from GM, will still have AFM activated. Most Departments will keep this tune, since a retune by the Department motor pool will void warranties, especially if the AFM lifters fail, and the AFM has been disabled. That's an expensive fix that NO Department wants to pay for.
If AFM is disabled on your truck, either the Department did it after the truck ran out of warranty (unlikely, as that's just extra hours spent working on a vehicle that's really not necessary, especially since that vehicle may soon be retired), or, more likely, there was some party that took possession of this truck after the Department was done with it and tuned the AFM out.
http://www.gmfleet.com/content/dam/gmfleet/global/master/nscwebsite/en/Home/Resources/01_images/2015-model-emissions-bulletin.pdf
While the tune may be different between the federal and Ca., etc., tunes, ALL of them, from GM, will still have AFM activated. Most Departments will keep this tune, since a retune by the Department motor pool will void warranties, especially if the AFM lifters fail, and the AFM has been disabled. That's an expensive fix that NO Department wants to pay for.
If AFM is disabled on your truck, either the Department did it after the truck ran out of warranty (unlikely, as that's just extra hours spent working on a vehicle that's really not necessary, especially since that vehicle may soon be retired), or, more likely, there was some party that took possession of this truck after the Department was done with it and tuned the AFM out.
CrashTestDummy
Full Access Member
I think my wife sees that number and tries to get it as low as possible. I mean, low score wins, right?!?
When I get behind the wheel, even when driving to the store, I usually put it back in the garage a few tenths higher. I'll turn to her and say 'your MPG is now 15.6. Your welcome.'
PG01
Supporting Member
I think my wife sees that number and tries to get it as low as possible. I mean, low score wins, right?!?
When I get behind the wheel, even when driving to the store, I usually put it back in the garage a few tenths higher. I'll turn to her and say 'your MPG is now 15.6. Your welcome.'
That’s actually pretty funny, i had it up to 17.6-18 when i parked it the garage the other night, it was 13 this morning when i got in....she kills me
domoarigato
Full Access Member
- Joined
- Feb 14, 2017
- Posts
- 95
- Reaction score
- 11
do you have a parts list for this? was it just the switch and the trim panel you added?
swathdiver
Full Access Member
I'm always about 2 mpg higher than my wife, she speeds everywhere.
Similar threads
