vti2

Hi I and a friend of me put a custom turbo kit on his car.
he´s setup

B16a2
stock internals
injectors are also stock
walbro fuel pump
T3/t4E turbo
40mm wastegate
40mm tial BOV
Greddy intercooler kit
FMU
Apexi VAFC
3" downpipe
2,5" hks exhaust
Profec 2 special boostcontroler

everything ist good
vacum lines
hoses and clamps
piping

we have two problems

the car is running to reach and is it makes only 3psi boost at 5000 rpm goes the boost down.

at the boostcontroler i can see there are no leacks i can read -66, we don´t know what to do anymore.