correct, mine used to hunt when putting it in neutral was pretty annoying, replace the icv but you will get stung £100 from toyota for one!but will sort the jobby out
i have one on my ep82 and it sounds really nice and basey but the only problem is that its knocking of my back axle which is driving me nuts!! it must be the way it is made becouse i have seen the blitz nur spec and it sits miles away fro the axle but the japspeed is almost touching did you find this guys??? on low revs its knocks alittle bit but asoon as i put more revs on it goes away but the sound makes up for that so its no biggy.