Hi guys, no dump valve, standard apart from de cat and exhaust. I have fitted an new genuine Hego today as the fault code im getting refers to this, still no joy, hunts badly at idle, has been serviced today, also no problem with breather hose, no splits etc. Have had it on live data fault machine and and will not go into closed loop lambda sais there is a problem with it, so its running lean at idle making it lumpy, cant see why though, might have a re map so rule this out as i am unsure of ehat its running at the moment.