just recently put a b18c gsr in my 93 ex but im having issues with it running cold it wont idle by its self untill the motor warms up then it will hold idle ive changed the map sensor tps done a full tune up and i just cant figure it out im throwing a cel im thinking it could be my o2 or knock sensor(dont have knock) need some help locating the problem car runs perfect at a warmer temp

 

i'm having similar problems w/ my b16a2 swap in my 99 ex. engine has stage 3 crower cams tho. i also have replaced the tps as it was bad.

 

my b16a swap was doing the same thing in my 92 si, I replaced the IACV and fixed the issue.