I've had a hesitation problem with my '88 TII for a while now... So far I've replaced & adjusted TPS, and installed a new fuel filter yesterday. Didn't help. Now I'm looking at vacuum leaks, grounds, and injectors. And I found something yesterday that sorta confused me:


Looks like it should be connected to something somewhere... It sucks a little at idle, I think. Could someone tell me what this is??

There's also one other place behind the intake near the firewall:


Haven't checked to see if it does anything.

Help?
Other suggestions?

 

The first picture looks to be bleeding brake or clutch fluid. It should only be connected to a clear tube when bleeding.

 

First one is the bleed valve for the clutch slave cylinder. No, it's not hooked up to anything. When you bleed your clutch, that is where you hook up some tubing and crack it open to bleed old fluid/air out.

Second one, no idea. My emissions was removed day 1.

 

Take another pic of the 2nd one just a little back.

There is a vac line diagram under the hood. Follow that and see if anything should be hooked up to that spot.

 

OK, been a while. I couldn't get a camera down to the place in the 2nd picture, but pretty much thought it would be futile as I noticed the other end was capped off. So now I ask: Should the uncapped end be capped as well/will it make a difference?