Does anyone have a routing chart for the vaccum lines under the backside of the plenum. I got a super loud hiss, crappy idle and narrowed it down roughly with some ether.

 

There should only be 3 lines coming from back there. The one to the brake booster, the one that Ts in with the a/c from the underside on the pass. side, and another that ties into the throttle body.

 

Half wrong . You have your brake booster, the Check valve, and the Fuel Pressure Regulator. There are also 2 lines running off of the EGR silonoid (sp) The bottom one goes to the underside of the TB and the upper nipple goes to the EGR valve. From the Plenum to the check valve, you have a line going to your HVAC and another going along firewall slicing off to the cruise control servo and the vacume canister under the Charcoal canister tray.

 

Oh yea, I forgot about the emissions locations exactly...eliminated most of mine. But he said his was toward the back of the plenum so I thought there were only 3 nipples off the plenum there...though he does have the egr lines and such there to deal with.