I know it would have been delt with before but i bought a S2 project, it was non running, i have it running now( used another metering head ).

The amal valve pipes were all missing so ive got them connected back to
the wastegate, turbo and the airbox,

Took it a run and its way overboosting i didnt floor it but even half throttle it will boost to at least 25psi( thats as high as my gauge goes) then drops back to 15 or so.

what would be causing it?