Hello! I’m new here. I’ve read the articles here many times. I recently bought a Mitsubishi Carisma 1.8 GDI and now have the following problems. When I wanted to change the spark plugs I noticed that around the candles was oil. But only in the 2 middle spark plugs. The outside (left, right) are both dry. I type that some gasket has to be changed. But I don’t know which. And the 2nd problem: The speed always fluctuated with me he only in the empty run. What can this be about?? Dirty throttle flap?? already in front of many thanks!!!