Thread: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector?

Results 1 to 13 of 13
  1. #1 Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Ok, I have been battling this cylinder 6 misfire for a while now. the cylinder 6 misfire is the only code it ever has and when you try and give it alot of throttle the car starts shaking and will not go. Then the check engine light flashes. I little history I changed the plugs and wires about 2 weeks ago with autolite 606 coppers. made no change. I did a compression test today and the 6 cylinder was at 140PSI while 1 cylinder was at 150PSI. So I am guessing it is ok? Only thing I can think of is a clogged or failing injector? While working on it today I noticed a exhaust leak where the egr and crossover are. They are so close I cannot tell where it is coming from. Do one of these usally leak? and could that cause a misfire? also when getting on the highway I smell that sulfer smell (bad cat?) but I was told a bad cat would throw a random misfire and not just a single cylinder and last but not least I found this connector on the rear of the engine going to nothing. I think its just there for a GTP maybe. but wanted to check to be sure.
    Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? Attached Images
    Reply With Quote  
     

  2. #2 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    Turbo is the way to go. BillBoost37's Avatar
    Join Date
    Jul 2009
    Location
    W Spfld
    Posts
    26,815
    Thanks (Received)
    53
    Likes (Received)
    90
    Dislikes (Received)
    1
    The wiring harnesses are pretty specific to each type of motor. That connector looks like it goes to what I believe is your California emissions equipped "stuff" on the rear manifold, above the rear valve cover.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
    Reply With Quote  
     

  3. #3 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I dont see anywhere it can plug in back there though?
    Reply With Quote  
     

  4. #4 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    Awaiting Confirmation
    Join Date
    Jul 2009
    Location
    aowdnawi
    Posts
    23,292
    Thanks (Received)
    0
    Likes (Received)
    1
    Dislikes (Received)
    0
    exhaust leak can very easily result in misfire.
    Reply With Quote  
     

  5. #5 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I guess I can just change the gaskets on the crossover since I can't tell fot sure where it is coming from?
    Reply With Quote  
     

  6. #6 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Jul 2011
    Location
    Benton, AR
    Posts
    34
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I also have a connector on the back side of my engine that I cannot place. Here are some pics





    Reply With Quote  
     

  7. #7 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    That is the same exact connector as I am talking about! also I found my exhaust leak is at the bottom of the egr valve. Do I need to replace the whole valve?
    Reply With Quote  
     

  8. #8 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    GTX Level Member OH4CompG's Avatar
    Join Date
    May 2009
    Location
    Portland Oregon
    Posts
    1,361
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Don't worry about the connectors. It's to connect to the california emissions solenoid that would be there if you had california emissions.
    Reply With Quote  
     

  9. #9 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Thanks OH4CompG, That is one problem down. I tried cleaning my egr and replacing the gasket but it is leaking from the pipe that goes to the headers. Does anything think this could be causing my misfire?
    Reply With Quote  
     

  10. #10 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Something else I noticed today while cleaning the egr is it has a knocking sound that could be coming from the number 6 cylinder but its hard to tell for sure. Could this be a broken spring or something in the valves even though the compression test came out ok?
    Reply With Quote  
     

  11. #11 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member Cobraeater's Avatar
    Join Date
    Feb 2012
    Location
    Ohio
    Posts
    49
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Hi there I'm having same prob as we speak only my misfire is cylinder 2...rear bank of cylinders though. I have changed coils plugs and wires. Could be a cat but I removed mine completely today removed codes and still have the misfire. Oh and before all this I had a misfire on 4 whole reason I changed coils plugs wires I have a thread on here as well I'm moving on to fuel system next if I fix my problem I'll let you know.
    Reply With Quote  
     

  12. #12 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    May 2012
    Location
    Canada
    Posts
    1
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    Any update on this issue. Did you ever get it resolved? I'm having the same issue with my cas. Same engine but in a camaro. Im consiering cleaning the cat out and cleaning the egr. any advice would be great. Misfire is only on cyl 6. I get the shaking even if the ses light doesnt go off. I think I might have got a post cat code one too. The way the thread op describes it is dead on!
    Reply With Quote  
     

  13. #13 Re: Cylinder 6 Misfire and exhaust leak and mysterious wiring connector? 
    SE Level Member
    Join Date
    Mar 2009
    Location
    Kansas City, MO
    Posts
    46
    Thanks (Received)
    0
    Likes (Received)
    0
    Dislikes (Received)
    0
    I was never able to pinpoint the issue. I ended up swapping in a new engine. I still need to disasemble the old one and see what I find
    Reply With Quote  
     

Similar Threads

  1. mysterious connector!?
    By gotboost3 in forum General Tech Discussion
    Replies: 13
    Last Post: 08-09-2011, 02:00 PM
  2. 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
  3. 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
  4. All Cylinder Misfire after LIM Change and Vac Leak?
    By Lawngoose in forum 3.8L V6 Supercharged (L67)(L32)
    Replies: 11
    Last Post: 02-12-2009, 06:32 PM
  5. wiring connector pins
    By Toasty in forum General Tech Discussion
    Replies: 3
    Last Post: 01-20-2008, 01:12 AM
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
  •