hi all having a mare with a 09 mk2 focus rs just wont boost clean it seems to hesitate while under load I cant confirm it as a misfire or lack of power or a hesitation its hard to explain it blew a boost hose then ran awful I replaced all boost hoses as were knackered and the map sensor in the intercooler was broken so replaced that as well its had a new air flow sensor plugs and coil packs and still fault remains next on the list is the boost pressure sensor on the turbo or actuator etc but just wondered if anyone else has had this before ?? its running 400bhp (jam sport )conversion so map injectors exhaust intercooler etc.any help would be great before I have to get in on the rollers and see!!