# Does the IAC control need the coolant lines? **URL:** \ **Category:** SON240sx Automotive\ **Created:** [May 17, 2010, 8:13pm UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183 "2010-05-17T20:13:54Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\ **Post date:** [May 17, 2010, 8:13pm UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/1 "2010-05-17T20:13:54Z")
just put a new shinny intake manifold on my redtop sr and now has an idle problem i do not have any vacuum/boost leaks anywhere including IAC fuel rail etc, i do have a clean airfilter and no restrictions, i do not have coolant lines to idle control motor mounted on bottom of manifold only way i can get it to idle (1000) is by plugging the IAC and adjusting the throttle to idle when IAC is connected to cold pipe it high idles at like 2000 and adjusting the IAC just makes it hunt for an idle from 1000 to 2000 ---
**Author:** ![prozac3ne2nr](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/prozac3ne2nr/32/5581_2.png) [@prozac3ne2nr](https://forums.speedlife.net/u/prozac3ne2nr)\ **Post date:** [May 18, 2010, 5:13am UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/2 "2010-05-18T05:13:52Z")
The fast Idle Cam does though, which regulates your cold start which is the idle greater than 1000 at startup. It has a coolant line which causes the Wax to expand, push the little piston forward and then pushes the throttle up for fast idle on cold start. See here: ![http://i591.photobucket.com/albums/ss356/riworx/FastIdlecam.jpg](http://i591.photobucket.com/albums/ss356/riworx/FastIdlecam.jpg) ---
**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\ **Post date:** [May 18, 2010, 4:44pm UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/3 "2010-05-18T16:44:59Z")
thats nothing like a sr20, on the throttle body there nothing like that there is only an idle adjuster for the throttle body … the coolant lines to the throttle body on a sr only heat the throttle body and do not use a cam or something to push the throttle open… my main question is the if the idle control motor thats mounted to the intake manifold need the coolant lines not the throttle body ---
**Author:** ![prozac3ne2nr](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/prozac3ne2nr/32/5581_2.png) [@prozac3ne2nr](https://forums.speedlife.net/u/prozac3ne2nr)\ **Post date:** [May 18, 2010, 5:44pm UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/4 "2010-05-18T17:44:46Z")
Really, this is what’s on my SR20det S14 VTC ---
**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\ **Post date:** [May 18, 2010, 8:19pm UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/5 "2010-05-18T20:19:46Z")
nope S13 SR’s dont have that on the throttle body … the coolant lines to the throttle body just heat it up but the IACV has coolant lines to it so it might have a same effect just located on the manifold instead of the throttle body ---
**Author:** ![John\_sinopoli](https://avatars.discourse-cdn.com/v4/letter/j/c6cbf5/32.png) [@John\_sinopoli](https://forums.speedlife.net/u/John_sinopoli)\ **Post date:** [May 20, 2010, 11:34am UTC](https://forums.speedlife.net/t/does-the-iac-control-need-the-coolant-lines/155183/6 "2010-05-20T11:34:15Z")
AND THE ANSWER IS YOU NEED THE COOLANT LINE TO THE IACV TO IDLE GOOD … HOOKED THE LINES UP AND IT IDLES MINT