Wanted to add my problem. I know the thread has been dead for a while. I just bought my wife a used 2008 Edge. If the car sits over night and then started it ticks until it warms up. It's not injectors and it does not idle rough or have a light on. It sounds exactly like a lifter noise. It's at the Ford dealer now being checked. The first guy that looked at it put up red flags saying it didn't right so they had another mechanic look at it and they said it was just injectors. They said they called in the heavy line mechanic to listen to the car while I'm there. I'm going to see the car tomorrow morning. I hope this isn't the beginning of a headache.