General Throttle body problem misfire? HELP!!

[Armelind]

I have for more than year problem with idle on my bravo 1.6 multijet 105hp. Since i cleaned throttle body engine vibrates and car same think like this video:

Calculaded boost was minus7.5psi and more.


Then after 1-2 week i try some used throttle body. Some does same like video up and as and some makes weird work like misfire only on cold ( old throttle body goes wild only when temp goes hot)
This one is my video: ( misfire starts at second 10 )



I try to put one which looks good and car does the same misfire only at cold start ( calculated boost goes from minus 1.5 to 2.9psi

After 3-4 days i try to unplug throttle body cable and engine check turned on of course and car doesn’t work weird also calculated boost goes -0.15 psi (maybe because car goes on limp mode) after I unplugged the throttle body cable.
Also i try to put my new electronic throttle part to my old throttle body and car makes wild misfire just like old.
So I came to the conclusion that the problem is not the electronic part of the throttle body but the part of the electric motor below.

What do you think guys? Should i order new throttle body wich cost a lot (550-700€) or should i check anything else?