Well, the dealer had the car for three days. They did a nice job of washing it, but were unable to duplicate the problem and thus didn't fix anything. Had to park outside for about a week and every morning, the car would start right up but sounded like it was running on 2 cylinders for 5-20 seconds. Had is sputtered for 10 seconds when the dealer started it, what would they have done different? Should I assume that they had it hooked up to some sort of test equipement? No error codes were generated.