Pd170 Bmn to Bkd intake manifold swap

Hi guys im new to the forum and to skoda ownership.

I have recently acquired a 2008 vrs pd 170 with the bmn engine.

I did some research and decided to purchase a bkd intake manifold kit online and have just had it fitted.

My problem is that the car is now idling high and and has a ticking noise when up to temperature, i have cleaned the egr whilst it was off and wondered wondered if anyone would have any advice for me ot has any experience on this. 

Thanks