Question for AFM Users
Advanced
Joined: Feb 2015
Posts: 60
Likes: 22
From: Markham Ont
Have use AFM on my 2015 z51 M7 with 37,000 Km (23,000 Miles) in the city and highway and have not encountered any issues, just oil changes and a set of tires is all it's needed. Only drive the car 6 months of the year. Took a road trip to Eastern Canada from Toronto with AFM turned on for the whole trip and got 7.0 litres/100km (33 mpg) on the highway. Have notice a little bit of a shudder when AFM is enabled, which is normal. Haven't really noticed a delay in response when I push on the gas, the switch over to v8 is instant in my opinion. In the last couple of years I've stopped using AFM in the city as I found the fuel savings are marginal and because of members reporting some issues when using AFM.
I'll continue to use AFM for the fuel savings.
I'll continue to use AFM for the fuel savings.
Administrator
Joined: Jun 2007
Posts: 66,408
Likes: 2,060
From: Bel Air (by way of Fort Worth, TX) Maryland
St. Jude Donor '12 thru '21
Many responces are too wordy for most but asking simply what your experience has been with AFM if you use it 100% of time seems not specific enough?
My experience was poor when I used AFM 100% of time. When I stoped using it my driving experience was much better.
I drove my 2016 19k miles at 100%AFM before selling. I had the TQ replaced, and the triple flush. The transmission always seemed to struggle(shudder) when transistion from 8 to 4cyl. When transistion from 4cyl to 8 it seemed like the transmission needed to shift gears sometimes.
Currently I've driven my 2017 5k miles since I got it used with 9400miles. Almost all 5k miles has been with AFM turned off. When I did have AFM on 100% of time(about 500miles)the driving experience was exactly like the 2016 which is why I now drive 100% of time with AFM off.
Maybe there are better ways to ask the question.
For those that have driven their corvette equiped with AFM more than 75k miles and the AFM was active 100% of the time did you have any mechanical problems traced back to the AFM? Yes or No? if yes what?
Most corvettes are only driven a few thousand miles so those might need to be excluded from your survey. Also there are many that track their cars so they might need to be excluded.
How bout the guys that only drive in city traffic? or those that drive in the mountains? It is hard to ask a question and get information that might make sense?
If I was a follower of those that respond on the forum I might just accept what folks say and accept what is actually useful to me. I know we get off topic from time to time.
Have fun and Drive safe! Finish out the crazy 2021 year thinking about how great 2022 will be
My experience was poor when I used AFM 100% of time. When I stoped using it my driving experience was much better.
I drove my 2016 19k miles at 100%AFM before selling. I had the TQ replaced, and the triple flush. The transmission always seemed to struggle(shudder) when transistion from 8 to 4cyl. When transistion from 4cyl to 8 it seemed like the transmission needed to shift gears sometimes.
Currently I've driven my 2017 5k miles since I got it used with 9400miles. Almost all 5k miles has been with AFM turned off. When I did have AFM on 100% of time(about 500miles)the driving experience was exactly like the 2016 which is why I now drive 100% of time with AFM off.
Maybe there are better ways to ask the question.
For those that have driven their corvette equiped with AFM more than 75k miles and the AFM was active 100% of the time did you have any mechanical problems traced back to the AFM? Yes or No? if yes what?
Most corvettes are only driven a few thousand miles so those might need to be excluded from your survey. Also there are many that track their cars so they might need to be excluded.
How bout the guys that only drive in city traffic? or those that drive in the mountains? It is hard to ask a question and get information that might make sense?
If I was a follower of those that respond on the forum I might just accept what folks say and accept what is actually useful to me. I know we get off topic from time to time.
Have fun and Drive safe! Finish out the crazy 2021 year thinking about how great 2022 will be
As I previously stated, I have a 2009 Avalanche, a 2019 Stingray, and my previous 2016 Stingray all with AFM and with the exception of briefly using a Range device on my 2019, I experienced zero problems related to AFM.
That said, I am aware of the issues related to AFM and I take the appropriate precautions to ensure I don't have any problems. My car is getting the triple flush as I type this post and I regularly check my oil levels (something that should be done on any car).
The reality is that if you have a 2014 to 2022 Corvette (yes, that includes the C8, I know) you have AFM and you will have to deal with cylinder deactivation, install a device that defeats it (which CAN potentially introduce its own set of problems), or have it tuned out (not a good option if your car is still under warranty like mine is). The vast majority of C7 owners do not have problems with AFM. As has been said, people typically post about their problems, not when they are not experiencing a problem.
Heel & Toe
Joined: Oct 2020
Posts: 17
Likes: 0
From: SC
AFM problems.
just replying to an old thread it Seems. I have a 2016 Z51. 50K Miles. had it since 10K Miles. never had an issue with the AFM. i came across here as i was just youtubing and saw the Supposed AFM problem. decided to look Deeper. My first 2016 Z51 with 40K Miles never had any problems with this as well. Heard the horror stories.. but i don't think its as common as most think. Course... i could be wrong. lol. Suppose nothing wrong with a AFM Disabler. i Drive in Auto 70% of the time. and in paddle shifts 100% of the time in the Blue ridge mountains which doesn't trigger the AFM
