Idle Issue

So, I have been experiencing rough idling at cold start for about a week 1/2. I crank up the truck, and usually it idles normally in park, but when I shift into drive or reverse, the poor bastard is acting like it's gasping for breath. It acts like it's about to completely stall out. After I hit the throttle however, that completely goes away and drives fine. No CEL comes on during this mini episode, so I'm a bit confused as to why this keeps happening. Anybody have a clue as to what it could be?

 

Could be the Idle Air Control (IAC) valve.
What motor do you have?

 

I never even thought about that. I have the 3.4

 

If you are comfortable with the task, you could remove the IAC from the throttle body and clean it. I haven't done this myself.

 

I'll give that a shot. Thank you for your advice!!