I'm having so highs and lows in my idle, I checked my vacuum lines and right near the intake of my tpi there was an uncovered hole, and there's also an open one on the valve cover of the same side. Do these connect? Any other suggestions? 88 Irocz by the way.

 

There should be a line from the valve cover to the intake. The dealer should have these lines and fittings in stock.

 

Both driver and passenger right? I've got the drives side one.

 

On my 87TPI set up I have one to the rear valve cover on the passenger side. On drivers side, just the pcv valve at the front of the valve cover.

 

Hey guys I got them all taken care of today, and I gutted my cat(on the car not my real one :P). It runs so much better now, thanks guys!