[V8] rough idle (update)

[QuickAudi at aol.com]

Well, I just got sick of my rough idle the other day, so I took every part of the air intake apart that I could and cleaned them all, even though they were pretty spotless.  I also serviced the K&N.  These two seemed to help a little, as the idle is not as rough as it used to be, but it is still far from purring.  That makes me think that the culprit is an air measuring device.  Could a MAF make the idle rough?  Idle control valve is working fine and clean, but could it be gone mechanically/electrically?  I also noticed a few other holes with hoses running to them; are there other sensors that I should know about?  
Also, something else that might help.  Before I had the low rough idle, I had a high idle.  It would not be present until about 2 minutes after starting the car, then, just like someone threw a switch, it started to idle high.  I think changing the OXS helped out with that problem, but oddly threw it the other way.  I probably should run a VAG-COM to see what it is saying now.  Anyone near Nashville, TN?  I'll be in Birmingham, AL this weekend if that helps.
One more thing: before the throttle, the air is "chambered", for lack of a better word, into 3 chambers.  Two go to the throttle butterflies, the other goes to a hose.  What is that hose?  It goes right next to the right bank of cylinders, and it had a little oil...


Joel
'90 V8q (getting headliner replaced tomorrow!!)
'86 5kcstq