Sorry for being non-responsive everyone, the holidays kept me pretty busy. Let me outline the details. I had been monitoring my codes and somehow must have cleared them before I took the vehicle to the dealership. At the dealership I explained the issue we were having and left it with them. They called me back a few hours later and stated that there was nothing they could do because all of the codes had been cleared and they would need a code first before they began investigating. However, from my description the mechanic felt it was probably a leaking fuel injector,which is what I was originally thinking.
Before I went back to pick the item up I did a little more research and ran across a blog (can't remember where I saw it at) where someone else with a different vehicle stated they had a similiar issue. After some troubleshooting they narrowed it down to the the Vapor Canister Purge Valve. I got to looking at what it would take to replace that and the cost. It is a Motorcraft Part
#CX2409 . I found it on RockAuto for $12.98, but didn't have time to wait for it to arrive. I purchased it from the Ford Dealership when I picked up the car for roughly $20.00. It was very easy to replaced, took about 5 minutes. Two screws and one connector, right under the engine shrowd towards the back of the engine. Very easy swap.
Since then we have not had any issues at all. No check engine lights, no rough starting or idling.
I did some research into what this part is used for and found that it is used to allow the gasoline vapors from the canister to be released into the engine. If the valve is stuck open it can cause a rich condition because the vapors are prematurely getting into the engine. This is especially true after filling up with gas. I tried to blow through the new valve, and it was sealed shut, nothing was getting through. I tried to blow through the old one and it was wide open, so I was sure this was the problem.
I found after some more digging around the cause of this problem is typically from people topping off the gas tank after it clicks the first time. This forces fuel into the canister and eventually to the valve causing it to fail. In addition, I found a recall for earlier makes of the Ford Edge that had this same part failing. So, that may have carried over to our vehicle.
Below is a link to the part.
http://www.rockauto.com/catalog/raframecatalog.php?carcode=1501951&parttype=4936
http://www.rockauto.com/catalog/moreinfo.php?pk=2604044&cc=1501951