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Old Jul 25, 2014 | 12:53 PM
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Default AFM Feedback

If I’m not mistaken, there have been some comments that the switch to 4 cyl mode is obtrusive.

I have an A6 and other than when in hilly terrain and not warmed up, the shift with my car is seamless. I run the car in Track mode most of the time but even so, it switches to 4 cyl frequently. It does, however, at other than interstate speeds even climb hills in 4 cyl mode.

Just got an instantaneous fuel economy reading of 99 mpg this morning, ha ha sure. Don
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Old Jul 25, 2014 | 01:01 PM
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I have the M7 and don't find in intrusive for highway cruising (the only time I use Eco Mode).
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Old Jul 25, 2014 | 01:28 PM
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My camaro was terrible, bought a range module to kill it, not needed in my vette.

Last edited by Glen e; Jul 25, 2014 at 03:40 PM.
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Old Jul 25, 2014 | 03:35 PM
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It's noticeable in hilly terrain, and if I rest my hand on my M7 shifter. So I don't use it in those conditions, and I keep my hand off the shifter.
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Old Jul 25, 2014 | 03:44 PM
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Originally Posted by -CM-
It's noticeable in hilly terrain, and if I rest my hand on my M7 shifter.
That doesn’t surprise me. Don
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Old Jul 25, 2014 | 07:18 PM
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I have an A6, and have never felt an 8/4 change.

BUT...

I do hear it with my NPP exhaust. Even passengers have asked, "What just happened?" when the V4 mode kicks in.

Ed
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Old Jul 26, 2014 | 05:39 AM
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I didn't notice it in mine on the way home yesterday from MacMulkin. 425 miles. Most of it in eco mode on the Tway.
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Old Jul 26, 2014 | 06:23 AM
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Active Fuel Management seems like a non-issue for me. I keep my M7 in eco mode as a daily driver. It's not obtrusive.
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Old Jul 26, 2014 | 07:43 AM
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AFM = useless corporate fuel economy gimmick
7th gear - no negligible difference in fuel economy
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Old Jul 26, 2014 | 07:53 AM
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I get my A6 coupe today and will drive it about 1000 miles (about 2 months as a DD) to asses my real world experiences with AFM and should I find it intrudes into my Corvette experience I plan on by-passing it with one of two options. I'm leaning towards a DiabloSport InTune device. But RangeV8 is an option.
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Old Jul 26, 2014 | 08:00 AM
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Originally Posted by AFVETTE
I get my A6 coupe today and will drive it about 1000 miles (about 2 months as a DD) to asses my real world experiences with AFM and should I find it intrudes into my Corvette experience I plan on by-passing it with one of two options. I'm leaning towards a DiabloSport InTune device. But RangeV8 is an option.
Why do you have to buy a mod to override it. I thought AFM only works in Eco mode. Couldn't you just not use Eco mode??

Have fun this morning.... If the weather is good tomorrow evening, there will be a large group of LGCC'ers at Bobby's Custard in Maryville. We'd love to see the new ride!
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Old Jul 26, 2014 | 08:08 AM
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Originally Posted by john m
Why do you have to buy a mod to override it. I thought AFM only works in Eco mode. Couldn't you just not use Eco mode??

Have fun this morning.... If the weather is good tomorrow evening, there will be a large group of LGCC'ers at Bobby's Custard in Maryville. We'd love to see the new ride!
Not for the automatics, in the M7 you can by-pass AFM in Sport and Track modes, not so in the Ax. The best we can do is operate the Ax in manual mode, but if there is no activity after 10 seconds it reverts back to auto mode and AFM will kick in as needed.

That's the downside to GM's design of the automatics.
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Old Jul 26, 2014 | 08:13 AM
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Originally Posted by C7Jake
AFM = useless corporate fuel economy gimmick
7th gear - no negligible difference in fuel economy
Call it what you want but I was pretty happy with 28mpg at 77-79mph. Much better than my 6 banger daily driver Jeep.
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Old Jul 26, 2014 | 09:19 AM
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I have the Z51 A6 with NPP and never really noticed when the vehicle transitioned between 4 and 8 cylinders. The audible difference was a lot more perceptible so I disabled AFM with my Diablo tuner. Gas mileage did not change significantly but I didn't purchase the Vette for gas mileage anyway.
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Old Jul 26, 2014 | 09:20 AM
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Default No AFM on A6 in Manual Shift

Originally Posted by AFVETTE
Not for the automatics, in the M7 you can by-pass AFM in Sport and Track modes, not so in the Ax. The best we can do is operate the Ax in manual mode, but if there is no activity after 10 seconds it reverts back to auto mode and AFM will kick in as needed.

AFM does not kick in after 10 seconds on A6 if you have shifter in "M". You will stay in V8 - watch DIC while driving.
If shifter is in "D" and you use paddle shifters it will revert back to auto after 10 seconds.
Enjoy the new ride! :0)
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Old Jul 26, 2014 | 09:24 AM
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Originally Posted by AFVETTE
I get my A6 coupe today and will drive it about 1000 miles (about 2 months as a DD) to asses my real world experiences with AFM and should I find it intrudes into my Corvette experience I plan on by-passing it with one of two options. I'm leaning towards a DiabloSport InTune device. But RangeV8 is an option.
Congrats on your new ride. Bet you can't wait for dealer to open!
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Old Jul 26, 2014 | 09:32 AM
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I've tested it a few times since I got my car on the 16the and really can't feel it. It's definitely not intrusive in the M7. It is cool that they have it isolated to eco mode only in the manual. All the other modes stay in 8 cyl mode. I won't be actually using it until my break in period is over though. I think it's best to keep all the cylinders firing during this period.
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Old Jul 26, 2014 | 09:35 AM
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I can mostly tell because I hear the injectors.. They seem louder in 4 cyl mode
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Old Jul 26, 2014 | 09:37 AM
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Originally Posted by AFVETTE
Not for the automatics, in the M7 you can by-pass AFM in Sport and Track modes, not so in the Ax. The best we can do is operate the Ax in manual mode, but if there is no activity after 10 seconds it reverts back to auto mode and AFM will kick in as needed.

That's the downside to GM's design of the automatics.
If the car is in M mode, it will never go into AFM
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Old Jul 26, 2014 | 10:10 AM
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I am always surprised that I can not tell which mode the car is in when I am driving. One of the screens gives you a green light in AFM. As mentioned before the exhaust sound changes but that is no big deal. When you hit the throttle it gives you power instantly. I can see no reason at all to fool with it in an Automatic car. If no one told you it was there you would never know. If you think about it as a bad thing it is all in your head not in the car. In my opinion of course.
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