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spark plugs

  1. 03 cts changed valve cover gasket now hissing noise

    Cadillac CTS First Generation Forum - 2003 - 2007
    Initially it started to idol rough. Checked the error code and was a spark plug miss fire at 3. Decided it would be best to replace both coil packs and all six spark plugs. When I pulled up the coil pack the spark plugs were full of oil on both sides. So I figured valve cover gasket. Replaced...
  2. P 0700 Code After Replacing Spark Plugs

    2008-2013 Cadillac CTS General Discussion
    Bit of a weird week. I've a 2008 CTS4 DI that earlier this week the check engine light blinked 3 times and then went out (indicating a misfire as I understand). Ran it for a day planning on doing spark plugs over the weekend. Before I could though, it threw a p430 so I figured I probably blew...