boost pressure sensor help/ AC help!

[colombianbryan]

alright i swapped in a s14 sr20det into my s14 zenki and for some reason i cant find the boost pressure sensor. i'm running a stock ecu which is the red wc and i looked up the pin out and its at 35 w. its no where to be found. also i got my ac hooked up and everything runs fine except that the small condensor fan right in front of the radiator doesn't start up unless i use some pins to jump it and it runs fine. my ac is still blowing cold but i cant tell if it cuts on when i'm driving since there's no way to look. and when i'm at idles my vacuum is at 19 but when i turn my ac on its vibrates really fast between 15 and 16 and than eventually stables out at 16. i know this is a lot but i've done tons of research and cant find anything. can someone please help!!!