Thread: 2008 grand prix cylinder 3 misfire

Results 1 to 3 of 3
  1. #1 2008 grand prix cylinder 3 misfire 
    SE Level Member
    Join Date
    Apr 2022
    Location
    Bristol
    Posts
    1
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Chats
    0
    Just got the car, was running good for a day or so, then started missing. Code reader says misfire cylinder 3. Lots of misfires on the misfire counter. I started with , new plugs ( acdelco iridium) ac Delco wires, I've tried new coil, 3 different ignition modules, replaced fuel injectors, pulled valve cover and found nothing out of place, all valves appear to open the same ammount. Cleaned the ground under the ignition module also.
    I don't usually ask for help, don't have to usually. I just don't know what else to do. Ive also cleaned the egr. Cleaned connection at computer, battery and ignition module plug. Even tried pure gas, no difference. And cat converter.

    Any ideas?
    Reply With Quote  
     

  2. #2 Re: 2008 grand prix cylinder 3 misfire 
    GT Level Member
    Join Date
    Apr 2014
    Location
    commerce twp,mi
    Posts
    299
    Thanks (Received)
    3
    Likes (Received)
    21
    Dislikes (Received)
    0
    Chats
    0
    inspect the wires to fuel injector.
    08 grand prix NA3800
    Reply With Quote  
     

  3. #3 Re: 2008 grand prix cylinder 3 misfire 
    SE Level Member
    Join Date
    Jun 2018
    Location
    Lehigh Valley
    Posts
    94
    Thanks (Received)
    0
    Likes (Received)
    5
    Dislikes (Received)
    0
    Chats
    0
    You could perform a compression check.
    '97 Grand Prix GT Coupe
    '05 Grand Prix GTP Sport Red Metalic SOLD
    '05 Grand Prix GTP Silver
    Reply With Quote  
     

Similar Threads

  1. Cylinder #3 misfire on 1999 Grand Prix GT
    By protoplayer in forum 3.8L V6 Naturally Aspirated (L36)(L26)
    Replies: 10
    Last Post: 07-12-2011, 09:11 PM
  2. Grand Prix GTP 3.8L V6 Supercharged Random Misfire Cylinder 3 PLEASE HELP
    By gtpmaddi in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 11
    Last Post: 05-12-2011, 10:18 AM
  3. From misfire at cylinder 3 to a open circuit on the fuel injecter at cylinder 5
    By bbfanatic23 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 0
    Last Post: 05-01-2010, 07:49 PM
  4. Cylinder #1 misfire and random cylinder misfire
    By whodat79 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 8
    Last Post: 04-21-2010, 07:16 AM
  5. 97 Grand Prix GTP with Intermittent #4 Cylinder Misfire
    By srlash in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 35
    Last Post: 11-08-2009, 10:00 PM
Tags for this Thread

View Tag Cloud

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
  •