Thread: Rpm's fluctuating between 3rd and overdrive

Results 1 to 4 of 4
  1. #1 Rpm's fluctuating between 3rd and overdrive 
    SE Level Member
    Join Date
    Sep 2013
    Location
    Dover, Ohio
    Posts
    4
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    My 2008 GXP seems to be going in and out of overdrive when I am driving at a steady speed. I watch the tach and it goes up and down about 200-300 rpms. Any help would be greatly appreciated.
    Thanks
    Reply With Quote  
     

  2. #2 Re: Rpm's fluctuating between 3rd and overdrive 
    SE Level Member
    Join Date
    Sep 2013
    Location
    Midwest
    Posts
    13
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Check your TPS sensor. I had the same problem about a year ago. Started with that and then progressively got terrible.
    Reply With Quote  
     

  3. #3 Re: Rpm's fluctuating between 3rd and overdrive 
    I live here. Below Average Joe's Avatar
    Join Date
    Aug 2011
    Location
    'Merica
    Posts
    7,358
    Thanks (Received)
    0
    Likes (Received)
    1
    Dislikes (Received)
    1
    Dover Ohio? Not to thread jack, but you are only about 20min north of me. We are having a meet in Coldwater on Sunday if you want to come on out. Its a haul, but it should be fun.

    http://www.grandprixforums.net/showthread.php?t=82332
    Quote Originally Posted by Sven The Sexman View Post
    Bill had a major role in all of the Star Wars movies; he was the force.
    Reply With Quote  
     

  4. #4 Re: Rpm's fluctuating between 3rd and overdrive 
    SE Level Member
    Join Date
    Jul 2013
    Location
    Michigan
    Posts
    1
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Did you ever figure out a solution to the problem? My 2004 GP GT is doing the same exact thing. It's when I'm driving at a steady speed usually around 50-60 mph or when LIGHTLY accelerating. When I floor it, it has a little less power than usual, but it doesn't sputter at all. I JUST replaced my plugs and wires and it still does the same thing. I've heard everything from torque converter to plugged catalytic converter to ignition coils. Has anyone actually solved the issue?
    Reply With Quote  
     

Similar Threads

  1. Fluctuating RPM's!!
    By Bessesen2 in forum General Grand Prix Discussion
    Replies: 2
    Last Post: 10-31-2012, 06:50 AM
  2. xp cam fluctuating rpm
    By 99prixgt in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 15
    Last Post: 03-03-2011, 12:14 AM
  3. Fluctuating RPMs 05 GP
    By NegativeOne13 in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 15
    Last Post: 01-31-2011, 01:19 PM
  4. Vibration and fluctuating Speedo
    By Panzer4 in forum Brakes/Suspension/Chassis
    Replies: 4
    Last Post: 01-12-2011, 09:34 AM
  5. Badly Fluctuating RPM's
    By SDGTP99 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 5
    Last Post: 06-22-2010, 08:07 AM
Bookmarks
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
  •