bad exhaust leak no boost???? sr20

[benarovi561]

ok so im trading my car to this guy. not going into detail. but its a sr20det with a aftermarket manifold and a 30trim turbo(thats what the guy said, idk). midmount setup. now heres the problem. the car had a real bad exhaust leak from the manifold somwhere. it doesnt boost at all. thats why im making this thread. now the turbo to manifold 4 bolt flange does not have the locking tabs. and all 4 bolts were on the manifold. i floorded it till bout 5k no boost at all. my question is the leak that bad where the turbo cant spool?? i had no locking plates and 3 bolts and blown gasket on my stock t25 and it still went into boost. im trying to find out what it is.could it be bad wastegate, siezed turbo, or just the 4 bolts are so loose it cant boost?? the mani is heat wraped, and u can see wher the 4 bolt flange is, the heat wrap is burnt alittle. the car has 750cc injectors on a fuel rail and fpr. i really want to trade the guy but the no boost is scaring me. i dont want the motor to loose compression cuz the rings got burnt to shit from running so lean. please post and let me know