SR Rich idle/breaks up under boost

[240nessx]

So i recently just did a s13 Redtop sr swap. At idle it runs between 10.0-10.5:1 a/f ratio, and cruising the car is perfect at 14.5-15.2:1 a/f ratio. Under boost it runs around 10.5:1 a/f, but once the car gets to 4lbs of boost it just breaks up bad and goes nowhere. Also when i start the car or let off the throttle it bogs down to around 200rpm then goes to 800rpm and idles beautifully. I'm running no bov, stock ecu and a ISIS t25/28 replacement turbo. Any help or insight would be appreciated. Thanks.