No top end power SR20det

[driftkid39]

I purchased hatch with sr20det t25 turbo stock wastegate running in car with fmic. When driving it reaches 7lbs of boost then at around 5k the car loses all boost and goes into vacuum side of boost gauge. So I went ahead and changed greddy fmic with a blitz fmic, changed wastegate, pulled plugs looked white like she is running lean, changed bov , super unleaded brand new O2 sensor. Someone said knock sensor but not sure how that would cause the boost drop. I was thinking the maf cas.

[JDMRIDDAZ]

u need to check ecu for codes first and foremost..
if u get codes then u will kno if its a sensor etc..
if no codes then u need to check all main engine components for resistance against specs in FSM...
ie..coils,maf,cts..
just dont go throwing parts at the car
but this could be a bad wastegate...
white plugs is a lean issue...so check voltage to ign coils...and to fuel pump..

[driftkid39]

Fuck yeah I was right boost was not making it to intake because intake cone was collapsing and i did check codes none and dvom and modus were 2 hours away and had some spare shit here. vantage was coming home from shop on monday if this was not figured out