surging idle b18c help

i just bought a type r throttle body with sensors swaped it on my car a few days ago , now i have a serging up and down throttle mostly idleing from 1,000 to 1500 rpm up and down its getting really annoying , i tried to reset the computer no luck , tried to adjust the the throttle screw and throttle cable still no luck,i swaped over map sensors also still no luck, i think it might be the tps sensor behind the throttle body but i dont know how to take it of there is speacial screws that i cant get off anyone have this problem , any help appreaciated