What's up dudes need or expertise got 01 1.8t a4 stock except for intake. Problem while driving on highway try to accelerate and it takes for ever and its still building boost till it won't build no more till I release the pedal while its trying to go up there can hear it pshhh and kind of thump or pop in the floor sounds liked it coming from exhaust or throttle not sure and when starting sometimes u feel the turbo rip thru 1st- like 3 rd gear and most of the time its just barely got any boost haven't got a boost gauge yet but what do you think it can be oh yeah and it always does that thing when accelerating psshh thump or pop no leaks when replaced all hoses and vacuum line been beating my head what it could be don't like mechanics I like doin it myself for experience help me out bro thanks

 

Anybody have anything? Possibilities?