Hey Folks,

About a month ago I purchased an Audi S5 Cabriolet through Kijiji with 102,000 Km's. I haven't driven it since, it's just been stored in the garage. I start it up every 5 days or so for a few mins or so. Today when I started it up and actually sat inside the vehicle I felt a rough idle, I could feel a vibration through the seats. I sat in the car for about 10 minutes and experienced this vibration. It wasn't a constant vibration, it would disappear and sometimes re-appear. Does anyone have an idea on what this could be? There are no engine light. Perhaps new spark plugs are required? Although it's only at 102k. Perhaps it's carbon buildup,and I can try a fuel injection cleaner? Or is it simply because it has been sitting in the garage for about a month and hasn't been driven?

 

I get this sometimes and my car is driven daily. Comes and goes.