Posting should anyone have this issue. At 3600 miles my GT2 experienced hesitation/engine missing mostly when accelerating at higher rates of speed. All seemed normal at average driving conditions. Occurred in normal or sport mode. After several visits to the dealership and a CEL a code finally appeared indicating that a ignition coil in cylinder #5 was bad. The dealership at Techline's advice replaced all 6 coils and spark plugs. A re-circulation solenoid valve code came up after this and was replaced as well. Glad to say that at this point I have driven it hard and stressed it several times for a week and the issue seems resolved. Back to having fun again. Will provide an update soon.