I took out my spark plugs today to see what they look like. The check engine code 9 is still on in my car (#1 cylinder position). When I took out the first one it smelled like oil and looked fairly black. Not nearly as black as the ones I replaced a month ago though. I'm guessing that's normal. When I took out the second one, the part of the plug after the coils looked rusted. I'm guessing thats really bad. Any ideas?