I know there si a tsb for rough idle. The problem is probably not in the tune. It sounds like some kind of hard part is going bad. It could be anything from a torque converter lockup issue to a lazy 02 sensor. You need to scan the car and look at everything to see if something is out of wack.

 

Yea I have the same issue. I know its in my tune. I put all the stock stuff back on and it went away.

Mine is not bad so I have not dug into it. Wanted to get the tune close.

 

well, the stock converter, and stock converter tuning are coming out next weekend, so we'll see if that cures it.

 

Mine does this aswell.

 

There is an ignition switch problem causing issues like this and the fix was a new ignition switch.

Dealer problem.

 

That sounds very plausible, as the truck has been hard to start a few times after it died. I'll call my dealer and see when they can get me in to take a look at it.

 

Its not my problem. I can put mine back to stock and it goes away.

I think its more common than you think with tuned trucks.

 

Do you have a log file of when it does this? If you have this problem.. here are a few things to look at:
Idle spark
Underspeed/Overspeed Adaptive Idle Spark - Coastdown,gear, and P/N
Idle airflow min
Adaptive idle airflow

Did you perform a case learn when you swapped pcms?

If you cannot provide a log.. make note of when it happens.. The tune demands more idle airflow when the truck has a colder ECT (its a multiplier). Has it ever bucked or stalled when you had a cold ect?

At 3mph it switches from coastdown spark to base spark. So when you are rising and falling around that threshold, coasting down (coast-to-base) and speeding up (base-to-main spark), it is all over the place.. It is likely that you touch 3 spark tables.. Main spark table (most spark), base idle (some spark), and coastdown (lowest spark). Not to mention.. 3 tables for adaptive airflow. Then you have your ECT rising.. which lowers the req airflow.. but that might not affect it too much.