Rough idle, after LT install and EGR delete

I tried attaching this to the other similar thread, but got no bites

Installed BBK headers and catted H
Removed EGR and DPFE
used the Lethal Performance EGR block plate and header cap.
Deleted 1 red vacuum line and the green one.
Now the red vacuum goes from passenger side to plenum to fuel
Checked PCV, bearing moves w/o problem
But the PCV valve hose was collapsing. I replaced it with some heater hose from ACE and tightened it with a clamp.
Told Bama tuners I removed EGR and to account for that in my tune (no more check engine light)


But I still get a drop in RPMs from 1100 to 500. When it idle it gently goes up and down. After a rev it comes down smoothly, hits 1100 and does a sharp drop, sometimes it sounds like it will stall out.

What else can I check?
Clean MAF?
O2's were brand new and have under 500miles on them
Smoke test (how could I do this?)

thanks all

yeah, I read your problem, I saw a hose maybe a little less in diameter than a sharpie right in the back, ran out hoping it wasn't in, it was. I will check there again though

You know, I didn't even think about checking the other end. Don't think any lines are cracked either. This is what I got. Ignore the dirt it has sat for almost a year ( last winter, months of travel and no inspection haha).

I'm hoping I just did something stupid and it's a simple "You didn't plug in X to Y, idiot!"