where is the EGR located on a 2007 mustang gt 4.6 v8

What is your question?

Rough on first start in the morning and gets better as I drive as it warms up. Stays good after a few miles driving and stopped to go to store. After getting back in the car after about 30 min. and start the car it won't start in first try, but it will start on the second try, and it does it successively throughout the day in every stop I make. Why is that? It starts perfect in the morning, but rough, even it sits for a few days. Appreciate an advise. Thank you very much. Arnulfo Lagasca

What makes this problem better or worse?

Normal temp in the morning. About 60 degrees

How long has your 2007 Ford Mustang had this problem?

A few weeks