So my brand new '14 JKU that I just drove off lot 36 days ago is already in the shop. My husband drove it today and said it started idling funny. He turned it off- went in to his appointment and when he started it the check engine light came on. Luckily he was 3 miles from dealership. Service guys were already gone so we had to leave it. All they said was " huh, never seen a brand new jeep with engine problems" . My husband said it sounded like it was only running in 4 cylinders. Any guesses?