Hose connection on intake manifold

Hey guys. I bought an Nissan Patrol GQ y60 a few weeks ago and it was running perfect. A few days ago it died on a traffic light and i had to get towed to the mechnanics who told me it is a problem with the carby. The car starts fine and drives good until it the engine is warm. When i then speed up, especially in second and third gear, it starts jerking (jumping, …) but that stops when i push the clutch and rev a litle bit and then i can go again for a bit further before happens againn. When the car stands still the engine is running fine without problem. After i had a look under the hood myself i found a hose disconnected but i just cant figure out where its from. I marked the hose that disconnected red in the attached pictureAttachment 78702. Thanks in advance for any help.

Hello, and welcome to the forum. Where does the other end of the hose go? It looks as if your engine is a TB42. Slip over to the introductions and tell us about yourself and your Patrol.
http://www.nissanpatrol.com.au/forum...-Introductions