Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Sign in to follow this  
L83_Z71

AFM Disable Damage

Recommended Posts

Evening y'all,

 

I know the subject of AFM either deletion or disabling has been beat with a stick but as I was doing some digging I came across a couple of articles that had me wondering. So I recently just ordered a Range for my '16 5.3 and am/ was eager to install it but.... I read that when disabling AFM in the long run it can hurt the motor i.e. lifters. My question is, has anyone been running a AFM disable tune/ flash for a few years and had any issues?

 

Thanks guys 

Share this post


Link to post
Share on other sites

Consensus on this website and others seems to be to delete AFM in any way possible as soon as possible, to eliminate oil usage and other potential problems; some say it results in smoother shifting and a better sounding exhaust, and most say it doesn't harm your fuel mileage too much at all.  Some folks think that having all 8 cylinders firing all the time is actually better for your engine in the long run.  

 

In 8 years on multiple forums, I have not heard of any damage caused by turning off AFM.  Seems like any damage is caused by not turning off AFM soon enough.  Yes, it is still possible to have AFM lifters fail after turning off AFM.  But that is due to faulty design or manufacture, not due to AFM being turned off.  All the Range V8 module does is turn off AFM.  Now, of course, it is possible to damage your engine if you use an aftermarket tuner to turn off AFM and install a high performance tune that requires higher octane fuel, and you continue to run regular fuel, or something like that.  And you still need to use the proper Dexos-rated motor oil and change it at the proper intervals, either way. 

 

I ran a Range V8 module for 4 years and then switched to a Hypertech Max Energy 2.0 tuner to turn off the AFM and tune other functions.  

Edited by MaverickZ71
  • Like 3

Share this post


Link to post
Share on other sites

Fully agree with what Bret said about oil and the use of a Hypertech tuner.  Now the truck just feels "right".

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites

My last truck was a 2014 5.3.  I had afm tuned out at under 1000 miles and returned it to stock 3.5 years later at 51,000 before trading it in.  I ran it for a couple months like that and no problems at all.  My current truck is a 2014 6.2 and now has 37k miles and is stock. Neither truck used any oil.

  • Like 1

Share this post


Link to post
Share on other sites
On 7/6/2018 at 1:25 PM, MaverickZ71 said:

Consensus on this website and others seems to be to delete AFM in any way possible as soon as possible, to eliminate oil usage and other potential problems; some say it results in smoother shifting and a better sounding exhaust, and most say it doesn't harm your fuel mileage too much at all.  Some folks think that having all 8 cylinders firing all the time is actually better for your engine in the long run.  

 

In 8 years on multiple forums, I have not heard of any damage caused by turning off AFM.  Seems like any damage is caused by not turning off AFM soon enough.  Yes, it is still possible to have AFM lifters fail after turning off AFM.  But that is due to faulty design or manufacture, not due to AFM being turned off.  All the Range V8 module does is turn off AFM.  Now, of course, it is possible to damage your engine if you use an aftermarket tuner to turn off AFM and install a high performance tune that requires higher octane fuel, and you continue to run regular fuel, or something like that.  And you still need to use the proper Dexos-rated motor oil and change it at the proper intervals, either way. 

 

I ran a Range V8 module for 4 years and then switched to a Hypertech Max Energy 2.0 tuner to turn off the AFM and tune other functions.  

Understood, just wanted to get y'all's opinion on it. Like I had said, upon hundreds of people saying it's great, I found 3 maybe 2 articles stating the negatives. I'd rather real people's opinions. Also yes I agree about oil and stuff . 

Share this post


Link to post
Share on other sites

I have been using the Range OBD2 AFM disabler  on my C7 Corvette for awhile now its fantastic. Waiting for Range to certify the DFM version for my Silverado. I will be first in line. The motor is made to run on all cylinders  no worry about that.

Share this post


Link to post
Share on other sites

Hi guys I just installed in my 2008 Silverado and I like so far. Do I need to install a switch to prevent battery drain? I only dive it a few times a week. 
thank you in advance for any input. 
 

kevin

Share this post


Link to post
Share on other sites
3 hours ago, Kevin vallem said:

Hi guys I just installed in my 2008 Silverado and I like so far. Do I need to install a switch to prevent battery drain? I only dive it a few times a week. 
thank you in advance for any input. 
 

kevin

No switch needed...if you're worried about it draining the battery, simply remove it from the OBD port.  No need in trying to re-invent the wheel

 

https://www.rangetechnology.com/blog/post/battery_draw/

Share this post


Link to post
Share on other sites

I know I'm new here and have been posting about this elsewhere, but can someone who has experience around here tell me if there have ever been any complaints of the Range causing mechanical engine problems?

Share this post


Link to post
Share on other sites

Worked just fine on my 2016 Tahoe.  No complaints; just more fun with the Hypertech tune installed and the AFM disabled with it.

Share this post


Link to post
Share on other sites

has anyone heard of havin engine failure/ruining your engine by putting a cat back exhaust on your 5.3L without disabling the AFM? 
 

ive recently purchased a ‘15 Sierra and I went to an exhaust shop to cut the stock exhaust off at the 3rd cat and put a y-pipe with dual 2.5” pipes out the back and they told me that when it switches to the 4-cylinder mode I could ruin my engine by not having enough back pressure. 
 

Anyone able to confirm/deny this from their experience?
 

I have a Range AFM disabler coming in the mail but it’ll take about 2 weeks to come in. 

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.