Hey guys so I recently got this code thrown. Truck idles kinda funny. Little puff of white when it starts. No smoke while driving or idling after it's warm no loss in power. Could it just be stiction? And also I updated my superchips cortex and re downloaded my tune and now the truck will take off like a raped ape after 2700 rpm, and also if I'm just sitting I park and rev it up it will rev up to 3400 then stall trying to idle......

 

Sorry it's a 6.0 diesel as well!