the gus

can any one help. i have a 93 wrx that is holding back .it is an intermitent fault one minute it is fine and flys the next its hesitating then it could be fine again ,then it will be like driving a non turbo. so far i have fitted new coils/plugs/kn air filter/fuel filter/lambda sensor/temp sensor(under inlet manifold)i have also changed the ecu/air flow meter/actuater/boost control valve and fitted dcat front pipe and centre pipe. thre is no pattern to it at all when really bad turbo gauge only reads .4 bar instead of .8. any help wolud be appreciated as it has been to three different garages and the only thing that has got better is there bank ballence.cheers

Omen1

check out your solinoied valve my need some cleaning