We parked the car for three weeks, and once underway, it started to miss. We were a 100 miles away with important medical appointments. I called Mark and explained the problem. He gave me some assurance that I could make the trip as long as it didn't get worse, and he described ways that it might get worse. In fact, over time it got better. Got it checked out first thing Monday. Mark and his gang do a great job in keeping us believing our old cars can live on.