30ff low boost pressure

2010 bmw 335 63000miles



Got 30ff code last night when driving normal merging on freeway then was only able to boost 8 psi which would drop down to 5. Today boost is going up to 12 psi and drops to around 11 And no half engine light has come on today as yet.



Recently install jb4 about 4 days ago. Now have 30ff boost leak code. Current mods are 7" vrsf intercooler, jb4, vrsf chargepipe.



Changed stock diverter valves a month before jb4 install to new stock diverter valves. Could the new stock diverter valves be leaking already?Noticed hissing when car is running from around the front intake/diverter valve area. Intercooler looks fine.



Any help would be appreciated

thanks