2004 S3 Idle Rough/very Low After Removal Of Sai And California Evap

Ok, so here's the whole prior related work so you guys can have complete information:

1. Installed shorter exhaust because I just like the way that looks. Caused excessive popping, so I started looking for ways to mitigate it. Found threads on SAI removal, so I decided to go for it.

2. Removed SAI, capped off the ports on the head, capped off the big port in the front of the airbox. Kept the SAI valve installed and plugged in, and it's ports are also capped off just to keep dirt out of it in case I need it later.

3. Removed all California EVAP equipment. The original hoses were all cracked beyond use at the part where you insert them onto the Idle Air Control valve and the back of the head, so I used some hose I had available and tried using hose clamps on everything. Worked great on the back of the head, but it ended up breaking a couple of the ports on the IAC valve because there wasn't enough clearance from the air box. I ended up teeing the lines together so they could all run into the remaining good port and I plugged up the other two ports. Idled pretty low, but was ridable, if annoying.

4. Not wanting to leave the bike running sub-par, I ordered a new housing for the IAC valve so I could have all three ports available again for proper air flow. I just installed it and ran three 1/4" ID fuel lines as vacuum hoses from each of the ports on the head straight to the IAC valve. I used this because it was the size of the IAC port OD. Now it's idling even worse than when I had it all tee'd together. When I first started the bike up after installing the new hoses, it started up just fine, ran at high idle for a while it warmed up (which it wouldn't do when it was all tee'd together), then dropped down to a reasonable RPM. But when I messed with the throttle, it dropped to below 1000 and stayed there, and then on my test ride, any time I dropped the throttle with the clutch pulled in and the RPM came down too fast, it would either cut the bike off or just idle really low for a bit. Even if I'm careful with the throttle, it will drop below 1000 RPM and sometimes will come back up and sometime will not.

My guess is a bad/stuck IAC valve?
I don't know enough about it to be sure

 

UPDATE: Ok, so I took everything apart again, took apart the IAC valve and sprayed it liberally with throttle body cleaner. Put everything back together and it's a marked improvement. It no longer dies, and sometimes it even maintains proper idle. Still a little rough, but at least it doesn't stall when I let out on the clutch in first gear. It's pretty inconsistent though, so I don't know if maybe it's still a little dirty, or if there is another problem elsewhere with a sensor or something. Maybe it'll just fix itself!