I was testing myc ar out tonight and i notice that in the higher rpms ranges in first it seems like i lose all boost feels like the car just loses its "uph" so to speak.. then in the higher rpms ranges in second the car becomes occasionally choppy, but in third the car seems to pull fine.. i really no clue what fuel cut feels like any idea what's happening? any helpful comments are apperciated thank you

 

doesn't sound like fuel cut as that is very sudden and usually happens in higher gears as the stock ecu is set to cut fuel at slightly lower boost levels in higher gears. sounds more like a vacuum leak. i don't have the link at work but you should go to the third gen turbo troubleshooting page. maybe someone could post the link for you today. if not, i'll post it when i get home tonight.
andy