2008-2013 Cadillac CTS Performance Mods Discussion, Misfire fix however in Cadillac CTS Second Generation Forum - 2008-2013; I was getting a misfire once in a while during acceleration it seems problem was getting worse was advise on ...
I was getting a misfire once in a while during acceleration it seems problem was getting worse was advise on coil pack could be the problem but which one? I decided to change the plugs to start the process of illumination and sure enough that was the issue plugs were pretty worn here is my 2 questions
1) found one of the plugs soak in oil what does that mean?
2) The engine runs with a slight vibration it did not have this before really not very noticeable if your in front of engine but when I look under the car I can see both tail pipe vibrating a bit much causing raddle did I screw something up? It does not throw any codes
I would like to know what the CEL is too. I have a vibration at idle also but once the engine is fully warmed up and after sitting for a half hour or so then started up again the idle is as it should be. It makes me think that it is a temperature sensor or possible injector fault. But I saw this thread and the note of the CEL and thought that I do not know what it is either.