Need a little ram hemi help

Sorry it's not an A body but my 2006 mega cab has the sniffles.
For a little while now I have been having a low looping idle when hot and a conk out frome time to time when cold. My unit has no egr.
I have changed plugs, cleaned, throttle body, and reset the computer. I am getting no codes.
Could it be the Inc from having a very dirty throttle body?
Any help would be great.