1997 caldina GTT 3sgte
Mods:
running stock turbo @ 0.9-1 bar exhaust/filter/ FMIC/platinum plugs/ blitz dual SBC boost controller.
Problem:
My car seems to have developed a boost related issue. If you say floor it when boost comes on you feel multiple "hesitation points" throughout the rev range - maybe 5 or so times between 3500 and 7000 rpm? Almost like someone tapping the brakes. This is what i would imagine the ecu whacking heaps of ignition retard would feel like. Car also feels more slugglish than usual.
Possible causes:
The short section of hose blocking off the other WG actuator port recently came off and before i had realised this had occured i planted my foot a couple times and boost rocketed twice to 1.7 bar and i hit was i assume was fuel cut (vsv disabled so i cant have been boost cut right?) Could this have damaged the knock sensor which is now causing the above described problem? Note there is no engine check light on.
What timing aye - was gonna go put the thing on the dyno tomorrow morning

Anyone got any suggestions?
AL