Page 1 of 16 12311 ... LastLast
Results 1 to 20 of 302

Thread: General Motors active fuel management.

  1. #1
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default General Motors active fuel management.

    So I'm not going to beat a dead horse and go on and on and on. I personally am a GM guy, but for the record I hate DOD (displacement on demand) or actively known as AFM. GM came out with this with the new 5.3 so basically 2007 and on. Their theory is to kill oil pressure to certain cyl's and collapse the lifter to stop the cyl from firing and being active. The concept is better fuel mileage. The concept freaking sucks!! I'm going to attach a photo of cyl 4 lifters which happen to be one of the 4 cyls that are AFM. It has ruined the lifter and flat spotted the cam. The spark plug was caked in "soot". This engine has 112000 miles on it. If I were a owner of this system I would delete AFM/DOD immediately. This repair cost 2700.00.

    As a paying site sponsor, I can say a2z will delete AFM and "tune" your vehicle for 300.00. Basically the tune gets rid of DOD and torque management. Torque management is where the engine retards timing during trans shifting to give a "smoother" shift. People say they get 1 to 3 more mpg's after the tune. I can't confirm this but I promise getting rid of DOD is well worth 300.00.



    Look at the lifter to the left. In your spare time Google Active Fuel Management

    And as always, thank you for your business.
    More fuel = more boost!!

  2. #2
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    I'll have the cam out tomorrow. I'll snap a picture. The peanut gallery will be along shortly with their input.... I'll allow the pics to speak for their self.
    More fuel = more boost!!

  3. #3
    Join Date
    Nov 2006
    Location
    Chapin
    Posts
    7,762

    Default

    Add to the list of things to do next time.
    *2008 & 2009 Bream World Champion*


    Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote. - Benjamin Franklin

    Quote Originally Posted by ecu1984 View Post
    "The Gamecocks are hammered dog shit"

  4. #4
    Join Date
    Nov 2006
    Location
    Ridgeville
    Posts
    3,519

    Default

    Afm still on the newest version of the 5.3? Think they call it ecotec???

  5. #5
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by cusportsman View Post
    Add to the list of things to do next time.
    Let's get those windows tinted.
    More fuel = more boost!!

  6. #6
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by wdhigh View Post
    Afm still on the newest version of the 5.3? Think they call it ecotec???
    Yep. The jury is out, time will tell. Susposedly redesigned system.
    More fuel = more boost!!

  7. #7
    Join Date
    Nov 2006
    Location
    Chapin
    Posts
    7,762

    Default

    Quote Originally Posted by KRT View Post
    Let's get those windows tinted.
    Got a list that keeps getting longer....
    *2008 & 2009 Bream World Champion*


    Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote. - Benjamin Franklin

    Quote Originally Posted by ecu1984 View Post
    "The Gamecocks are hammered dog shit"

  8. #8
    Join Date
    Jan 2014
    Posts
    2,166

    Default

    Sad shit

  9. #9
    Join Date
    Feb 2003
    Location
    Northwestern SC
    Posts
    3,138

    Default

    please open a shop in Greenville! Thanks for the advice earlier!
    Go Tigers!!!

  10. #10
    Join Date
    Nov 2007
    Location
    Lexington, SC
    Posts
    14,522

    Default

    Does the $300 included one of those flat billed hats? Or is that extra?

  11. #11
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by Steelin' Ducks View Post
    Does the $300 included one of those flat billed hats? Or is that extra?
    I have some visors and koozies left. I tend to save those for customers that break the 1000.00 mark.
    More fuel = more boost!!

  12. #12
    Join Date
    Nov 2008
    Posts
    1,322

    Default

    That explains it...

  13. #13
    Join Date
    May 2005
    Location
    where you aren't
    Posts
    2,287

    Default

    Mine is a 2008 but does that necessarily mean it has DOD?

  14. #14
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by Five Oh View Post
    That explains it...
    I think you're hoovering around 950.00
    More fuel = more boost!!

  15. #15
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by BRR View Post
    Mine is a 2008 but does that necessarily mean it has DOD?
    Not all have it. You will get a icon in the cluster if it has AFM and its active.
    More fuel = more boost!!

  16. #16
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Basically Flex fuel models.
    More fuel = more boost!!

  17. #17
    Join Date
    May 2005
    Location
    where you aren't
    Posts
    2,287

    Default

    Ok thanks, mine is not flex fuel. Just the basic 5.3 as far as I know.

  18. #18
    Join Date
    Nov 2006
    Location
    Chapin
    Posts
    7,762

    Default

    Mine doesn't show in cluster unless I'm watching instant mpg, it'll say v8 or v4
    *2008 & 2009 Bream World Champion*


    Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote. - Benjamin Franklin

    Quote Originally Posted by ecu1984 View Post
    "The Gamecocks are hammered dog shit"

  19. #19
    Join Date
    Nov 2002
    Location
    Lexington
    Posts
    19,836

    Default

    Quote Originally Posted by cusportsman View Post
    Mine doesn't show in cluster unless I'm watching instant mpg, it'll say v8 or v4
    Yep. This right here.
    More fuel = more boost!!

  20. #20
    Join Date
    Nov 2006
    Location
    Manning
    Posts
    2,874

    Default

    pretty sure i have crossed the $1000 mark......no visor....yet

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •