Hi, I am John Mc, a Ford dealer tech. I hope I can help you quickly and accurately. One moment while I work on your problem.
There are two common things that can cause this problem. First is a sticking open egr valve. To check this you remove the valve and see if it is stuck open. If so clean it and retry. If ok you probably have a turbo issue. The vanes will stick from carbon buildup or a worn cam ring in the turbo. To fix this you have to disassemble, clean the vanes and replace the cam ring if worn.
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Yes, thats the egr valve. Use some large channel locks and pull up with the pliers and it will come out. Just takes a little force.
If you hear air chatter you definately have a turbo issue. Take it off and take it apart. Clean it and if the ring has any wear replace the ring. Very common. Egr was probably sticking a little making the problem worse so you are getting there. Just take your time with the turbo and mark everything so you put it back together in the same position. Remember you are only messing with the hot side of the turbo.