Sometimes when I am cruising at 80mph and then try to accelerate, the engine bogs down like it is out of fuel for a second then picks back up. This was happening before I had dealer download new programs and is still happening, It does it more before engine gets to full temperature, any ideas?

Fuel Filter?

Mine does this too and I had the fuel filter changed at 15k and still does it, never found any answers to this yet. Just had mine reflashed for this rough idle problem and haven't noticed if it is still doing this. Guess I'll have to check this out http://www.dieselplace.com/forum/smileys/smiley24.gif

mine does the same thing at about 82 mph. dealer replaced all the injectors and it was good for about 1500 miles and is now back.

Mine does same thing,feels like it might be the converter unlocking and locking.If I put it in tow haul it seems like about 90% of it goes away.May not be the same problem you guys are having.Never happens below 80.Feels kind of jerky.

mine does it in either tow/haul or normal and when it does it if you are looking back you can see a puff of smoke sometimes.