replaced the spark plug and coil with brand new porsche parts.
the misfire on cylinder #2 is present and i still have smoke:

well…. any thoughts on this? as it’s daylight the smoke color is better to get

 

That smoke looks extremely white on my monitor. Has your coolant level dropped?
A stuck fuel injector will foul out a plug and cause smoke, but the smoke will be a darker gray color. Does the exhaust have a fuel smell?

Something doesn't sound right in your video. Can you take another video of the engine idling?

 

yes, white smoke in mu eyes too.

coolant level hasn’t dropped, at least noticeable.

exhaust has massive fuel smell.

misfire on cylinder #2 remained even with new spark/coil combo.

i have only this video more:

 

I would do a compression check on that cylinder and the ones next to it for comparison.
While the spark plug is out, see if it's actually sparking. You may not have voltage reaching the new coil pack due to a break in the wire harness.
If you have compression and spark, I'd then swap the injector with one of the others and see if the problem follows to that cylinder.

 

stupid question, i know but how fo i check if i get sparking? just remove the coil and leave it connected and start the car?

 

Yes, but you also have to make the plug threads have contact to ground, like touching the head or engine block. The spark plug is fired by 12v through the coil pack into the plug and down the electrode and the threads of the plug to the head supply the ground. This is also why you never use anti-seize on plug threads as it acts as an insulator and prevents a good ground.

 

today a serviceman looked at the car and said he thinks it’s a stuck-open fuel injector and this is fuel smoke.
does it make sense?

 

I hear what sounds suspiciously like piston slap in the first video. This would explain the oil fouling on a single plug. It isn’t obvious in the second video but the mic is really close to the engine which makes piston slap more difficult to hear. I wouldn’t throw any more parts at the car until you have ruled out bore scoring.

 

no offense Brett but I’m starting to think your bore scoring sniffer is on overdrive

 

Perhaps, but something sounds quite off in that first video.