[pandrade]

first check for codes in the system heres how
http://www.toyota-supra.info/forums/...tic-codes.html

if you have a super moniter( the thing in your dash whith 4 buttons that tells time,mileage,oil change and date) press( from left to right it will be button 1,2,3,4) the # 1 and 3 it will say error keep holding until it says diag then press #4 and it will say eng let it read the codes untill it gets back to eng. write down all codes here it will tell you what each code means, it will also tell you how to check codes if u dont have the super moniter
http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

im no expert ( that would be cre) but the whoosh u hear at boost could be a boost leak