Just a thought, before you do anything, stop by a Cummins shop with the engine serial number and find what valve springs you have.
Not sure about your '06 but on a older one I had, I had 30lb springs and had to change them to 60lb springs so the EB would not cause the valves to float.
You do not list what transmission you have, if auto might have to do something to raise line pressure so it can hold at off throttle.
Might check here. Cummins Engine Forum
http://www.cumminsforum.com/forum/
Jim
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2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's