# Rough Idle When Cold: SR **URL:** \ **Category:** SON240sx Automotive\ **Created:** [February 8, 2012, 5:35pm UTC](https://forums.speedlife.net/t/rough-idle-when-cold-sr/220360 "2012-02-08T17:35:14Z")\ **Posts on this page:** 3\ **Page:** 2
**Author:** ![danbikes](https://avatars.discourse-cdn.com/v4/letter/d/f9ae1b/32.png) [@danbikes](https://forums.speedlife.net/u/danbikes)\ **Post date:** [February 12, 2012, 3:14pm UTC](https://forums.speedlife.net/t/rough-idle-when-cold-sr/220360/21 "2012-02-12T15:14:34Z")
> [@randy240sx](#): > > thnx for the info guys its a big help this morning i started the car up again and i realised when the engine was cold and it was idling rough there was air being released from the BOV :s, I got the BOV from a guy who said it was tuned so it doesnt make sense, and the wierd thing about it is that when the engine is warmed up the BOV is fully closed. Lol, yea that would do it. When it warms up the rubber seal becomes less brittle and seals it properly most likely. What BOV is it? If it’s adjustable, try tightening the screw until it closes completely (when it’s cold). Make sure you don’t adjust it too much though, or else it won’t open when you let off the throttle. If you have to adjust it that much though, I would recommend just getting a new one. If it’s not adjustable, scrap it and buy a new one. ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [February 12, 2012, 3:30pm UTC](https://forums.speedlife.net/t/rough-idle-when-cold-sr/220360/22 "2012-02-12T15:30:53Z")
its a HKS replica lol i have a genuine HKS at my uncles shop i was planing to install, looks like i better get on that, i dont know if the replica is adjustable. ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [February 13, 2012, 8:10am UTC](https://forums.speedlife.net/t/rough-idle-when-cold-sr/220360/23 "2012-02-13T08:10:06Z")
so this morning started the car and putmy hand on the vent on the BOV and the car ran perfect, super easy fix 🙂 but i wanna thank u guys for the quick input and adivce!! gonna grab a real HKS bov lol [Previous page](https://forums.speedlife.net/t/rough-idle-when-cold-sr/220360.md?page=1)