2005 CTS Misfire #4 cylinder
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 4 of 4
Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, 2005 CTS Misfire #4 cylinder in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I have been troubleshooting my CTS 3.6 to determine why #4 cylinder is misfiring. The computer sets two codes one ...
  1. #1
    Brad54 is offline Cadillac Owners Member
    Join Date
    Nov 2013
    Posts
    3

    2005 CTS Misfire #4 cylinder

    I have been troubleshooting my CTS 3.6 to determine why #4 cylinder is misfiring. The computer sets two codes one that identifies random multi misfire and the other open fuel injector circuit #4. I swapped the #4 coil and injector with #1 and cleared the codes. After running the engine the computer set the identical two codes. I have replaced the plugs and changed the oil and filter. I cleaned and inspected connectors, tested wire from #4 injector to CPU wire tested good! Does anyone have any suggestions what I should test next?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Iceman_jd's Avatar
    Iceman_jd is offline Cadillac Owners Fanatic
    Automobile(s): 2007 3.6 CTS
    Join Date
    Oct 2012
    Location
    Arizona
    Posts
    104

    Re: 2005 CTS Misfire #4 cylinder

    Quote Originally Posted by Brad54 View Post
    I have been troubleshooting my CTS 3.6 to determine why #4 cylinder is misfiring. The computer sets two codes one that identifies random multi misfire and the other open fuel injector circuit #4. I swapped the #4 coil and injector with #1 and cleared the codes. After running the engine the computer set the identical two codes. I have replaced the plugs and changed the oil and filter. I cleaned and inspected connectors, tested wire from #4 injector to CPU wire tested good! Does anyone have any suggestions what I should test next?
    Bad #4 injector? Did you actually pull the fuel injector from the fuel rail and swap with another, or are you just talking about the spark plug coil? Injectors are basically a solenoid, if the coil in the injector opens (a break in the wire of the coil) it fails to complete the circuit. that might be what the computer is telling you.

  4. #3
    Brad54 is offline Cadillac Owners Member
    Join Date
    Nov 2013
    Posts
    3
    Thanks for the reply. I Swapped #4 injector to #1 cylinder and the misfire stayed with #4.

  5. #4
    ktr-sb is offline Cadillac Owners Fanatic
    Automobile(s): 06 SRX 3.6L 2WD
    Join Date
    Mar 2004
    Posts
    425
    Any progress on this issue?

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting