93hondaboy

hey guys out there im not sure if you guys can help but my car idles really weirdly.its like it is surging. meaning it idles and then drops on and off. frequently. then after a long time of driving the car it stop surging but then it idles kinda high.
now all i have down is it is a d16z6 turbo. rc 390 injectors along with a safc. and i missing link. now most people say i have a vacuum leak. but damn thats must be something serious cuz i changed alot of things on it including the iacv, intake manifold. even the map sensor. the only thing i thing that can cause this issue is possibly the throttle positioning sensor. and also my car isnt throwing any check engine codes ether. someone help me please