Hi guys, Im completely stuck I own a subaru uk turbo 1998 and it has a huge hissing noise when I drive, Ive owned plenty of turbo cars so instantly put this down to a boost leak, checked all pipes replacing the intake pipe and a few others ive check and double check clamps,pipes etc and still when i drive i have the loud hissing and the car is gutless the turbo doesnt smoke or anything, the hissing seems to come from the passenger side of the engine when im driving, very frustrating its not dump valve either any help would be magic as im very close to giving up thanks guys

 

Bump please