idle surging problems

well i bought my car with a swap (b16a1) and i have notice idle surging from about 400 at times up to 1500 and im thinking 400 is pretty damn low not sure what the problems is help me out guys

i also have another stupid question okay well im getting ready to tune my car up what do yall suggest being thats its already getting cold
what type of oil? filter? plugs? anything else i should do/replace

clean your aic
if you dont no how just search
its easy to do

im having the same problem man, so if you figure it out then let me know. because i keep getting the same answer, clean your iac and tb. I dont know where the iac is even located , so let me know if you figure something out, and ill let you know if I do. Good luck

after searching the site i found this
http://www.g2ic.com/forums/showthread.php?t=42969&highlight=idle

HAVEN’T DONE ANYTHING YET WILL GET TO IT MONDAY ILL LET YOU KNOW HOW IT GOES