No, I don't have a check engine light on. Other than the "rough start" everything seems normal.

My s80 has developed a "rough starting" problem. If the car sits parked for a few hours or overnight. When I start it, it turns over. Begins to run, but "shudder" for 3 - 6 seconds and then runs fine. While I'm out driving if I go into a store and come out. The car will start fin...