2014+ AFM (Active Fuel Management)

[diannabill]

Doesn't seem to bother me much, but I wonder if anyone's tried this Range product:

 

http://www.rangetechnology.com/products/range-v8

[gmc1]

How "seamless" is your AFM?

Mine, not so much. Granted this is the first vehicle I've owned with cylinder deactivation, it just doesn't seem right to me. It's honestly like it's downshifting when it goes from V4 to V8 at a hill or gust of headwind. And V8 to V4 isn't much better. There is a very noticeable (but not huge) jerk exactly like the transmission is shifting up or down. Have not tried in manual mode yet but will next time I'm out and about.

Edited March 18, 2014 by MotoMedic
Added Topic Tags

[patmc81]

I can feel mine, but only enough so I look down to see it has switched not harsh at all

 

Sent from my VS980 4G using Tapatalk

 

 

[bigdeer1]

Throw and exhaust on it & you'll be shocked how bad it can really get.

[haider320]

If i'm not paying attention, I would never know it switched. If I anticipating it going to V8 to V4, I will notice a slight engagement.

[TechSTL]

If i'm not paying attention, I would never know it switched. If I anticipating it going to V8 to V4, I will notice a slight engagement.

 

Same for me.

[fondupot]

Not noticable unless I look at the dash V4/V8 light.

 

My dads old 07 Suburban had it and that was also seamless.

 

I also had a 2010 Camaro and that was also seamless too.

 

Some win, some lose.

Edited January 7, 2014 by fondupot

[pm26]

Some systems are rougher activating and deactivating than others. And for those who think it is rough, it does not any better with age and use.

[seatec]

Not noticable unless I look at the dash V4/V8 light

same here but with the bigger tires and lift it hardly goes into V4

[sams819]

Can't feel the shift at all, even when I anticipate it. The dash justs changes to V4. It is better than it was on my 2013.

[mzodarg]

Not noticeable before MF exhaust. Definitley hear it now, not so pleasant but tolerable.

Edited January 7, 2014 by mzodarg

[KUUG]

with the bigger tires and lift it hardly goes into V4

 

This is the biggest problem I'm having with it

[RyanbabZ71]

On our Tahoe (08) only knew when it kicked inbuilt watching the dash. It was seamless. Camaro had AFM it was seemless except for the audible noise through the exhaust.

 

 

Ryan

[Silverado Steve]

If it wasn't for the dummy light on the info gauge, I'd have no idea it was in V-4. Mine is smooth. Sorry to hear your's isn't.

[reldridg]

Not noticable unless I look at the dash V4/V8 light

 

Same here by last vehicle had MDS (Hemi) and I did not notice it switching either but it did not have any lights or anything to indicate that it was switching between the two separate displacements.

Edited January 7, 2014 by reldridg