The Official(?) AFM Hate Thread

Martinjlm · 07-31-2017, 01:47 PM

I've noticed in a number of threads that folks are looking for ways to completely disable AFM. In some cases it seems to be because they don't like the way the car feels when it transitions from V4 to V8 or vice versa. I don't know if this is specific to vehicles that have been modified or have an E85 tune or something else.

When I drive my car, unless I am working' it, I honestly don't know what mode it's in (V4 or V8) unless I look at the IP. And I have never felt or heard it switch. I have watched it switch on the IP, but never felt a bump, shake, chuggle, or any other indicator that something is going on under the hood. The exhaust doesn't seem to sound any different when in V4 mode. Personally, I like the additional fuel economy I get from AFM.

I just took a long trip and saw the IP switch modes a number of times. My max 50 mile mpg was 30.3 and my max 25 mile was 32.4. No doubt a lot of that due to being in V4 for a lot of the highway driving, even at relatively high speeds. At one point in time I was in V4 mode doing 84 on a slight incline. Top down.

So for those that hate AFM, what is it about the feature that drives you over the wall?

Those that like it, feel free to chime in, too.

cignul9 · 07-31-2017, 01:53 PM

It's never bothered me one way or another. I kind of like the fuel savings.

ABM1SSSG3 · 07-31-2017, 02:21 PM

Quote:

Originally Posted by Martinjlm

I've noticed in a number of threads that folks are looking for ways to completely disable AFM. In some cases it seems to be because they don't like the way the car feels when it transitions from V4 to V8 or vice versa. I don't know if this is specific to vehicles that have been modified or have an E85 tune or something else.

When I drive my car, unless I am working' it, I honestly don't know what mode it's in (V4 or V8) unless I look at the IP. And I have never felt or heard it switch. I have watched it switch on the IP, but never felt a bump, shake, chuggle, or any other indicator that something is going on under the hood. The exhaust doesn't seem to sound any different when in V4 mode. Personally, I like the additional fuel economy I get from AFM.

I just took a long trip and saw the IP switch modes a number of times. My max 50 mile mpg was 30.3 and my max 25 mile was 32.4. No doubt a lot of that due to being in V4 for a lot of the highway driving, even at relatively high speeds. At one point in time I was in V4 mode doing 84 on a slight incline. Top down.

So for those that hate AFM, what is it about the feature that drives you over the wall?

Those that like it, feel free to chime in, too.

+1, When I ordered my SS I was already thinking that I wasn't gonna like it, but I was wrong, very wrong. My driving is about 40% highway & 60% stop & go. Best 50 mi stretch is 30.8 mpg, and that includes a little city. I didn't buy this car for economy by any means. I'm not light footed, but averaging 21.0 since delivery is a plus in my book. Seamless transition.

solarstingray · 07-31-2017, 02:22 PM

I would just like an option to choose what I want !!

my c7 only did it in eco mode great idea !!! not all the time in the new Camaro ss

Glen e · 07-31-2017, 02:23 PM

Get a range module to kill it, they work.

ChevyRules · 07-31-2017, 02:26 PM

I don't hate it. I like the fuel savings, for the most part I don't hear it going into V4. I do hear the AFM valves opening and a subtle change in exhaust tone when going to V8( stock NPP exhaust).

I have some annoyances with it though. On the highway when maintaining a speed, it will go into V4 and not producing enough power to maintain said speed where V8 and throttle position was enough to maintain speed. Now I know that is largely due to the road I'm on isn't completely flat, but still annoying. A few times though when accelerating from a stop under light throttle and it will go into V4 in the middle of acceleration. Almost like it's the A8's version of the dreaded 1-4 skip shift.

One concern I have with it is I have been reading and hearing is the lifter issues the 6.2 liter V8's(both truck and LT1) have been experiencing has been caused by too much back pressure when in V4. So I'm just wondering if that is a ticking time bomb for me or it's a combination of the back pressure and defective lifters and the back pressure just triggers the defect to manifest eventually.

mekirk2 · 07-31-2017, 02:30 PM

I have noticed the exhaust sounds much different in V4 mode but I leave my NPP in track. Other than that it doesnt bother me at all.

cellsafemode · 07-31-2017, 02:30 PM

My trifecta tuned V6 only switches to V4 mode when i am in touring. If i change to Sport, it never goes into V4 mode.

I like it. My best 50 miles mpg is over 40. Awesome sauce. It makes a difference if you let it and it doesn't get in the way of performance when you dont want it.

IMadeYouReadThis · 07-31-2017, 02:35 PM

Just wait until your powertrain warranty is over and then pick up a handheld tuner and Flash that AFM away. If I have disabled in my Sierra for more than a year with no issues

MiamiBlueCamaro · 07-31-2017, 03:14 PM

Quote:

Originally Posted by Martinjlm

I've noticed in a number of threads that folks are looking for ways to completely disable AFM. In some cases it seems to be because they don't like the way the car feels when it transitions from V4 to V8 or vice versa. I don't know if this is specific to vehicles that have been modified or have an E85 tune or something else.

When I drive my car, unless I am working' it, I honestly don't know what mode it's in (V4 or V8) unless I look at the IP. And I have never felt or heard it switch. I have watched it switch on the IP, but never felt a bump, shake, chuggle, or any other indicator that something is going on under the hood. The exhaust doesn't seem to sound any different when in V4 mode. Personally, I like the additional fuel economy I get from AFM.

I just took a long trip and saw the IP switch modes a number of times. My max 50 mile mpg was 30.3 and my max 25 mile was 32.4. No doubt a lot of that due to being in V4 for a lot of the highway driving, even at relatively high speeds. At one point in time I was in V4 mode doing 84 on a slight incline. Top down.

So for those that hate AFM, what is it about the feature that drives you over the wall?

Those that like it, feel free to chime in, too.

This is worst.

Glen e · 07-31-2017, 03:16 PM

No Big deal, when it comes, there will be a switch to turn it off if you're that upset. And until you turn it back on , it will always stay off the more you restart the car. Per BMW and MB. On perf cars, it will always be a user selectable option.

ron scubadiver · 07-31-2017, 03:23 PM

AFM is totally invisible in my car.

cellsafemode · 07-31-2017, 03:36 PM

that start stop nonsense is an extra couple seconds of hesitation when the light turns green. Aint nobody got time for that.

I'm glad the current gen camaro doesn't implement that garbage. Hopefully by the time i drive my car into the ground we'll be on electric drivetrains and I can skip that entire mess.

Glen e · 07-31-2017, 03:40 PM

Quote:

Originally Posted by cellsafemode

that start stop nonsense is an extra couple seconds of hesitation when the light turns green. Aint nobody got time for that.

.

Not My experience ....the MB System is virtually instantaneous. I really don't want it either, but it's being way overblown as a problem. As your foot comes on the brake, before you can get to the gas, no better how quick you try, the engine is restored.

07-31-2017, 01:47 PM	#1
Martinjlm Retired from GM Drives: 2017 Camaro Fifty SS Convertible Join Date: Mar 2017 Location: Detroit Posts: 5,229	The Official(?) AFM Hate Thread I've noticed in a number of threads that folks are looking for ways to completely disable AFM. In some cases it seems to be because they don't like the way the car feels when it transitions from V4 to V8 or vice versa. I don't know if this is specific to vehicles that have been modified or have an E85 tune or something else. When I drive my car, unless I am working' it, I honestly don't know what mode it's in (V4 or V8) unless I look at the IP. And I have never felt or heard it switch. I have watched it switch on the IP, but never felt a bump, shake, chuggle, or any other indicator that something is going on under the hood. The exhaust doesn't seem to sound any different when in V4 mode. Personally, I like the additional fuel economy I get from AFM. I just took a long trip and saw the IP switch modes a number of times. My max 50 mile mpg was 30.3 and my max 25 mile was 32.4. No doubt a lot of that due to being in V4 for a lot of the highway driving, even at relatively high speeds. At one point in time I was in V4 mode doing 84 on a slight incline. Top down. So for those that hate AFM, what is it about the feature that drives you over the wall? Those that like it, feel free to chime in, too. __________________ 2017 CAMARO FIFTY SS CONVERTIBLE A8 \| MRC \| NPP \| Nav \| HUD \| GM Performance CAI \| Tony Mamo LT1 V2 Ported TB \| Kooks 1-7/8” LT Headers \| FlexFuel Tune \| Thinkware Q800 Pro front and rear dash cam \| Charcoal Tint for Taillights and 3rd Brakelight \| Orange and Carbon Fiber Bowties \| 1LE Wheels in Gunmetal Gray \| Carbon Fiber Interior Overlays \| Novistretch bra and mirror covers \| Tow hitch for bicycle rack \|

07-31-2017, 01:53 PM	#2
cignul9 Drives: 50th 2SS MRC A8 NPP Join Date: Jan 2017 Location: ATX Posts: 259	It's never bothered me one way or another. I kind of like the fuel savings. __________________ Club F1FTY 50th 2SS, MRC, NPP, 8A, #991 Join the Club F1FTY Registry! Add yourself to the registry here. Read the registry here.

07-31-2017, 02:23 PM	#5
Glen e Retired from Car mfrs.... Drives: 2LT RS/HR-V Join Date: May 2013 Location: /Fort Lauderdale Posts: 10,048	Get a range module to kill it, they work. __________________ Glen CLICK HERE for detailing a new car: detailing for non detailers CLICK HERE for how to rinseless CLICK HERE for EASY wheel sealant

07-31-2017, 03:16 PM	#11
Glen e Retired from Car mfrs.... Drives: 2LT RS/HR-V Join Date: May 2013 Location: /Fort Lauderdale Posts: 10,048	No Big deal, when it comes, there will be a switch to turn it off if you're that upset. And until you turn it back on , it will always stay off the more you restart the car. Per BMW and MB. On perf cars, it will always be a user selectable option. __________________ Glen CLICK HERE for detailing a new car: detailing for non detailers CLICK HERE for how to rinseless CLICK HERE for EASY wheel sealant

07-31-2017, 03:23 PM	#12
ron scubadiver Drives: 2017 2SS Hyper Blue Join Date: Dec 2016 Location: Houston TX Posts: 550	AFM is totally invisible in my car. __________________ Check out my photo blog: https://ronfromtexas.wordpress.com/

07-31-2017, 02:22 PM	#4
solarstingray Drives: 2014 c7 corvette and 2017 camaro ss Join Date: Jun 2017 Location: orlando Posts: 224	I would just like an option to choose what I want !! my c7 only did it in eco mode great idea !!! not all the time in the new Camaro ss

07-31-2017, 02:26 PM	#6
ChevyRules Drives: 2021 Tesla Model 3 LR Join Date: May 2016 Location: USA Posts: 964	I don't hate it. I like the fuel savings, for the most part I don't hear it going into V4. I do hear the AFM valves opening and a subtle change in exhaust tone when going to V8( stock NPP exhaust). I have some annoyances with it though. On the highway when maintaining a speed, it will go into V4 and not producing enough power to maintain said speed where V8 and throttle position was enough to maintain speed. Now I know that is largely due to the road I'm on isn't completely flat, but still annoying. A few times though when accelerating from a stop under light throttle and it will go into V4 in the middle of acceleration. Almost like it's the A8's version of the dreaded 1-4 skip shift. One concern I have with it is I have been reading and hearing is the lifter issues the 6.2 liter V8's(both truck and LT1) have been experiencing has been caused by too much back pressure when in V4. So I'm just wondering if that is a ticking time bomb for me or it's a combination of the back pressure and defective lifters and the back pressure just triggers the defect to manifest eventually.

07-31-2017, 02:30 PM	#7
mekirk2 Drives: 2016 2SS Ragtop Garnet Red Join Date: Sep 2016 Location: Alabama Posts: 447	I have noticed the exhaust sounds much different in V4 mode but I leave my NPP in track. Other than that it doesnt bother me at all.

07-31-2017, 02:30 PM	#8
cellsafemode Drives: 2016 Camaro 1LT Join Date: Jan 2016 Location: California Posts: 3,491	My trifecta tuned V6 only switches to V4 mode when i am in touring. If i change to Sport, it never goes into V4 mode. I like it. My best 50 miles mpg is over 40. Awesome sauce. It makes a difference if you let it and it doesn't get in the way of performance when you dont want it.

07-31-2017, 02:35 PM	#9
IMadeYouReadThis Drives: 02 Camaro SS 6M / 11 GMC Sierra Join Date: Mar 2017 Location: Pickering, Ontario, Canada Posts: 1,096 View My Garage	Just wait until your powertrain warranty is over and then pick up a handheld tuner and Flash that AFM away. If I have disabled in my Sierra for more than a year with no issues

07-31-2017, 03:36 PM	#13
cellsafemode Drives: 2016 Camaro 1LT Join Date: Jan 2016 Location: California Posts: 3,491	that start stop nonsense is an extra couple seconds of hesitation when the light turns green. Aint nobody got time for that. I'm glad the current gen camaro doesn't implement that garbage. Hopefully by the time i drive my car into the ground we'll be on electric drivetrains and I can skip that entire mess.

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