Hey, car started running bad today (1999 Volvo S70). When the Check Engine came on, I ran the codes and it came up with a cylinder misfire and low catalytic. So, I bought plugs. In the process of replacing, I noticed a small amount of fresh engine oil in the number 2 cylinder. All others were clean. After replacing cylinders, car was running worse. Any idea what's going on?? I would really appreciate any input on how to repair or what I am looking at $$ wise if I go to a dealer.

Thanks,
Nate

 

Please respond to this thread about cylinder misfire and oil in #3..I forgot to check the notify me by email when someone replies box. Thanks!! Nate

 

You need to pull you codes via the odb-ii port and let us know what codes you are getting. Was there oil in the cylinder or just on the outside of the plug? Any oil laying under the spark plug cover?