Replacing #3 & #4 ignition coils

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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Replacing #3 & #4 ignition coils in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; While getting my convertor replaced at the dealer, they informed me that these 2 coils are failing. They have not ...
  1. #1
    gfp55 is offline Cadillac Owners Member
    Automobile(s): 2006 CTS
    Join Date
    Dec 2012

    Replacing #3 & #4 ignition coils

    While getting my convertor replaced at the dealer, they informed me that these 2 coils are failing. They have not thrown codes yet, but after having killed my convertor from a misfire in #2 cylinder, I want to get this out of the way ASAP. I have an '06 CTS - 3.6l. My question is - is it possible to change these 2 coils without removing the upper manifold? Thanks.

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  3. #2
    Kingoftypos is offline Cadillac Owners Master
    Automobile(s): 06 CTS Sport/Luxury package
    Join Date
    Apr 2009
    Ledyard, CT

    Re: Replacing #3 & #4 ignition coils

    Nope, only cylinders 5 and 6 can be removed with out taking the upper intake off. All others, 1, 2, 3 and 4 the upper intake needs to come off.


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