Whats this on an 8v Xr2i?!?!?!

Unfortunatly dont know fook all about em

Looks like an ISCV to me but just wanted to make sure, car wont run from cold unless its unplugged (obviously have to keep the revs up or it'll stall) But then when u blip it unless the white sensor on the inlet is unplugged it stutters at about 2k revs...................

Any ideas to why?!?!