Engine power loss?

Ace1991-2009 · 2008-06-01T02:52:48+00:00

I have a 1999 ford f-250 with 198000 miles on it, when you drive down the road it bogs down and is really slow. i already replaced the fuel pump, fuel filter, and cat converter. I've checked all 8 coils and they are good, and the plugs are in great shape. I also noticed that when you floor it the engine misses and loses power and then wont go over 3000 rpm, it kicks down every time i try to rev it. check engine light is on so i checked it out and only one code came back, it was the EGR vale code. would that be causing this problem? what do you think will solve this power loss because it is very apparent and its driving me crazy!