Darkspy

Hello Z bros..
I hAve a 08 350z. I'm facing a some serious issues.

It all started with a small lag bounce and rough in idle.. So I decided to clean the throttle bodies.. Bad idea since it only went wrong and the idle got crazy and the car undrivable (no I didnt touch the valves...) no cel light on.. so.. I got the consult III to reset.. Didn't work.. After 100 times of manual relearn procedure.. Idle stabilized.. But I can still notice the original issue of idle bouncing.

Now.. Whenever I start the car especially in cold starts.. It won't go up on rev but will almost stall.. Make some boom sounds like some crack or small explosion.. Then with the help of a throttle or just alone it will go higher in revs and warm normally..
On warm starts it will do the same but with a shorter time (almost stall them recover all that in 3seconds).. Bouncing idle on red lights tho..

I truly need some advices since the Nissan dealership in Morocco do not know a clue about these issues.. Even with the consult III that showed nothing.
Link to the video: