Thread: Changed plugs and now misfiring

Results 1 to 9 of 9
  1. #1 Changed plugs and now misfiring 
    SE Level Member
    Join Date
    Apr 2009
    Location
    canada
    Posts
    4
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I just changed the plugs on the wifes 06 with 3.8 supercharger.
    First I put in a set of plugs called E3's. The car was misfiring and backfiring. I checked all the plug wires and looked for any lines I may have knocked off, and still nothing. So I talked to a GM tech and they said the 3 pt spark plug is not good on a supercharged motor so I put the factory plugs back in. Took it out for a test drive and everything seemed to work great. The wife took the car out to a town about 100 miles away. She said it almost never made it there because it was backfiring so much and engine light came on and was flashing.

    I know there is probable threads on this, but I have to leave on monday for work and going to be gone for a month. If I could get any ideas I would apreciate it.
    Reply With Quote  
     

  2. #2 Re: Changed plugs and now misfiring 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    21,022
    Thanks (Received)
    21
    Likes (Received)
    45
    Dislikes (Received)
    0
    Are there any codes that can be pulled to see exactly what pulg is misfiring?

    If you gunna be getting new plugs go with either the new originals or a the autolite 606's.

    SMGPFC Member #1
    Reply With Quote  
     

  3. #3 Re: Changed plugs and now misfiring 
    SE Level Member
    Join Date
    Apr 2009
    Location
    canada
    Posts
    4
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I don't know if it's throwing a code or not, but I bought the factory ones and put them in(that was 4 days ago) and it seemed to work good till tonight.
    Reply With Quote  
     

  4. #4 Re: Changed plugs and now misfiring 
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    39,919
    Thanks (Received)
    63
    Likes (Received)
    166
    Dislikes (Received)
    5
    have you changed the plug wires yet? or checked to see if one or more are laying on the exhaust manifolds? and make sure the wires are on the plugs all the way? and you don't want the plug wires touching the 02 sensor wires from what I've read here.

    did you pull the motor forward when you did the plugs? so you could see back there better and get your hands in there better.

    sometimes when we pull the old wires off they break too, you could have pulled one or more apart. the wires usually get really tight on the plugs and you need to really do the hard twist and pull on them.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
    Reply With Quote  
     

  5. #5 Re: Changed plugs and now misfiring 
    SE Level Member
    Join Date
    Apr 2009
    Location
    canada
    Posts
    4
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I didn't have to tilt the motor. I don't think I had any wires touching the exhaust, but I did have a hard time getting 2 wires off on the back side. So maybe I'll try test the plug wires on the car to see if any are broke. I can't do that till sunday night.
    Reply With Quote  
     

  6. #6 Re: Changed plugs and now misfiring 
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    39,919
    Thanks (Received)
    63
    Likes (Received)
    166
    Dislikes (Received)
    5
    its just hard to really see back there if you don't pull the motor forward you just need to pull the dog bones, the 2 metal brackets the attach to the rat support and the front/ side of the engine, i wear 3x gloves so i got me some huge ass hands, i couldn't get my hands back there if i tried....but you can see a whole lot better if you do move it, it moves real easy too, not like you need to pry it or anything. and not to mention get a socket, 3 inch extension, and a ratchet in there. makes life much easier.

    plug wire sets are like 30 bucks, its worth doing.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
    Reply With Quote  
     

  7. #7 Re: Changed plugs and now misfiring 
    GTP Level Member KeithGTP03's Avatar
    Join Date
    Jan 2011
    Location
    Houston
    Posts
    2,841
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I didnt see anywhere that you changed the wires. Id just get a new set of plug wires to eliminate them all together. Its cheap and if thats not the cause, it isnt a waste because you'd need them eventually.

    03 GTP...Its got pulleys and stuff.
    Reply With Quote  
     

  8. #8 Re: Changed plugs and now misfiring 
    SE Level Member
    Join Date
    Apr 2009
    Location
    canada
    Posts
    4
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I never changed plug wires, but I'll pick some up today. Should I go to GM dealer and get them or is it OK to go to aftermarket
    Reply With Quote  
     

  9. #9 Re: Changed plugs and now misfiring 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
    Join Date
    Sep 2009
    Location
    Rogers, MN
    Posts
    21,022
    Thanks (Received)
    21
    Likes (Received)
    45
    Dislikes (Received)
    0
    get a life time warranty set from autozone or where ever

    SMGPFC Member #1
    Reply With Quote  
     

Similar Threads

  1. Just changed the plugs on the Comp G.
    By speedy2 in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 24
    Last Post: 04-19-2011, 03:49 PM
  2. Misfiring HELP!!!!
    By Grandprix07gt in forum General Tech Discussion
    Replies: 13
    Last Post: 03-07-2011, 04:17 PM
  3. Changed the plugs on my car today
    By RotyP in forum General Tech Discussion
    Replies: 12
    Last Post: 02-15-2011, 12:33 PM
  4. misfiring
    By backinblackgtp in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 11
    Last Post: 12-20-2010, 09:22 PM
  5. Misfiring?
    By hotshot in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 4
    Last Post: 08-05-2008, 09:33 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
  •