F-250 Fumes in Cabin

[chriselk]

My wife and I have noticed that there are some minute exhaust fumes coming in the cabin. Now I have to admit that I do have a sensitive nose. However, I have owned an ancient diesel Mercedes and two diesel powered boats. The truck is not smoking excessively and I dont "get on it" very often.

It is a 2006 model and I do not see any exhaust leak from under the car. Could a stuck EGR valve cause this?

 

[Double-S-Diesel]

could be one of the flex parts on the up pipes.