On a 2003, Driver side intake manifold has a vacuum switch between cylinder 4 and 5 intake risers. A line comes off the bottom of that switch and goes to the Y connector near the vacuum tank the other end goes to a connection on the underside of the passenger side plenum collar. The same switch has a second tube that goes to the diaphragm you pictured. I have an engine apart now and can probably get you a couple pictures
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2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
Last edited by jsceash; 01-20-2013 at 01:26 PM.
Reason: add Photo
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