Thx for help!
I'm quite sure there was a vacuum leak after TB. I tightened all 4 clips which connect intake tract and tb. All clips were very loose.
I've started the cold engine couple of times today and no problems at all! Also when the engine is hot, idle is very stable. When pressing the clutch rpm's drop to 800 and stays stable. Before rpm's went to 600-650rpm and then raised to 800. The car is now much easier to drive in city.
Anyway, i may change it to ´86 911 next week :\
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