idling issue!!!!!!!!

[ZeNkI S14]

I have an issue with my idling on my sr20 the idle air control valve is turned all the way down, and when i drive and stop at the light it revs at least 2100 rpm's and it fluctuates while it is at idle. it jumps back and forth and it will not idle down what so ever. my motor is built and right now it doesn't have a stand alone at the moment i would like to fix this issue please help me out because this idling issue is irritating me. thanks.

[rotorolla]

check timing if you dont have a light buy a cheap vacuum gauge and gradually pull timing to 21 in.You say built motor is it stock cams or has the deck been cut or head cut.Those would also give you timing issues.

[ZeNkI S14]

it has stock cams and the head has been decked as well. we had it timed when we had it started up as well. but would it idle different as well if the fan constantly runs when the key is turned on the on position and while it is running. i have noticed as well that it has that issue during cold weather as well some where around mid 30's and below is when it idles high and jumps back and forth. when it is about around in the 50's it is fine and idles at normal rpm's.