hi people i have a subaru wrx jdm turbo my95 now around a week or so ago i started having a boost problem were the boost dropped from 1.3bar down to 0.6 bar. today when i took it out i noticed that at very very low boost say 0.2ish you can hear it dumping out of the dump valve but once you go above that it sounds like a puff of air and not my dump valve.do you recon the problem is with my dump valve or a boost leak else were it is a forge dump valve and has been fine for the past 2 years but latly i have been having these proplems any advice would be grately appriciated

 

first things first is start by checking all your boost lines make sure there isnt any cracks in them

 

ok stuck another dump valve on it and still the same loss of boost and not sounding quite right so i guess it comes back to a boost pipe issue then

 

just go through all your pipes and make sure they are all connected tightly and there is no cracks in them other than that you mite need to give your soleniod a good cleean out or replace it with another 1