I know this has been addressed before. but i cant find it in the search. heres the story, I got this car off a buddy and its been sitting for 5 years. he couldnt get it running, i finally got it runnin and it ran perfect but then the boost started to fall off and wont buid past 4 psi. there is play in the turbo but the impellars are not rubbin the housing,I know play is bad but i dont tkink that is the problem. its not idling right either,so im thinking boost leak what do you all think.