So I have been having slight power surges while under power and towing, when it happens it will make a "sucking noise" from under the hood and puff black smoke. I couldn't figure out what or why it was happening?
After reading some of the threads in this forum and others, I decided I needed to pull the EGR valve and clean it.
So... about an hour and 7 bucks later my truck runs beautifully!!!
I also decided to do the Zoodad mod last night, I will find out this week if it will help the MPG's. But either way, it does seem to be a little smoother when rolling onto the throttle at highway speeds.