I had the same problem with mine, my set up is a TA49, 42lb injectors, TH downpipe, Hooker exhaust and a tt chip. It started to cut and buck like yours and after i got a bigger fuel pump ad hot wire kit annd changed the fuel fillter it ran a lot better.. BUT! i was still cutting out. Found out my cars boost was turned up way to high( ater i turned it down to 15lb it ran great). So my sugestion is, if you dont have a fuel pump and hotwire kit..get one. With the bigger turbo and injectors you wanna make sure your giving that car the fuel it needs. Also check your boost and make sure its not too high( if so turn it down). Hope i helped