ka-t problems

[drivinsidewayz86]

hey i just bought a 98 240sx turbo and im having some problems with it the things dont to it were a ams gt32 turbo 480cc injectors walbro 255 fuel pumps apex-i safc2 and n62 maf and a now name intercooler the idles rough it will go from 1000 to 500 and almost stall then back to 1000 again and when i get drive it the car reachs full boost around 3000 at like half throttle the car is good but breaks up after liek 5k and when you try to boost at wide open throttle the car starts to buck i was just wondering what the problem could be thank