Solved ... :oops:
Vacuum leak
Bolts on the intake manifold were not tightened enough causing (as you guys said) vacuum leak. Tightening to 26Nm wasn't enough (that value was in service manual). After tightening all the screws it idles as it should.
Thank you for your help.
cheers
Dan
SOLVED -high idle rpm, idle surging after PRC intake install
Civic Type R EP3:
http://www.honda-club.cz/forum/garage.p ... cle&CID=37
http://www.honda-club.cz/forum/garage.p ... cle&CID=37