Hi chaps been meaning to set my idle up for a while since the stage 3 msd chip I fitted then caused it to hunt on idle. Was told when car warm to unplug idle control valve and set idle to 850rpm and then plug it back in. Turns out the idle screw is seized. Removed throttle body and soaked overnight with wd40 down the hole but was still full up come the morning and still no movement. Looks like I may poss need a new throttle body :-( anyone had this problem before?