MrG 3 Posted August 3, 2008 I have removed the std intake manifold from my car, and there is a pipe that fixes into the underside of it, appears to come from near the SAD? What is this for? Is this part of the emission system? Thanks AG Share this post Link to post Share on other sites
steve@cornwall 100 Posted August 3, 2008 I have removed the std intake manifold from my car, and there is a pipe that fixes into the underside of it, appears to come from near the SAD? What is this for? Is this part of the emission system? Thanks AG It actually comes from the SAD! Share this post Link to post Share on other sites
Rob Thomson 6 Posted August 3, 2008 It's where the air from the SAD re-enters the inlet manifold. The SAD varies the amount of air allowed through it to control the idle speed. Share this post Link to post Share on other sites
MrG 3 Posted August 3, 2008 (edited) Thank you rob/steve, thats much appreciated. This SAD thing is gradually being understood. There's also what appears to be a pipe that comes from the back that leads into the air trunking elbow between the afm and the TB, what would that be for? Expel excess air into the intake for the emmission system? Edited August 3, 2008 by MrG Share this post Link to post Share on other sites
CosKev 16 Posted August 3, 2008 Pretty sure thats the inlet to SAD,air goes in through that hose,is then regulated by SAD,then it by-passes the throttle body and into your inlet manifold,this air then raises your idle. Share this post Link to post Share on other sites
