it will take 2 mins.. side of the inlet mani with 2 bolts on it then unclip the pipe boom off.. wack some carb cleaner in with a straw fire away and watch the dirt fly out
just a sugestion mate clean the IDV with some carb cleaner and try it then.. my GT was awful at idle and used to hunt like a bitch.. cleaned this as it was full of gunk and sorted the problem out