If you had a different idle when you sprayed there..then that is the only gasket there. If it'* not that..the EGR is leaking from the external. I've never found one to do that..but heck.. you got a serious issue.

I know...:/ serious issue for sure. That misfire REALLY is scary.

New gasket on. Started it, same issues as always.
Sprayed starter fluid in same area, same idle change...it bogs down, then smooths out.
I'm spraying in that bottom of egr area..its also hitting where the tube connects to the EGR...not at the UIM, but at the EGR. Same results. so maybe it is the tube?
Unhooking battery cable to reset and see what happens overnight.

There couldn't be anything underneath/in the line of fire of my spray that would bog the idle could there?
Wanna make sure I'm chasing the right thing.

I really hope my LB1 and my p0300 are related...

Pull the tube and ...oh wait, you say it'* rusty. But yet..you also keep saying UIM. Tube is from EGR to LIM and the LIM is aluminum material. They can't rust. Would you take a picture to show us the issue.

My EGR. When I spray at the area circled in red, the idle bogs down then climbs back up.
Is my actual EGR leaking??

Oops. heres the picture.
http://tinypic.com/r/27zjjhk/7

Probably a bad EGR then.

Is that common for that area to leak? That'* super weird.

Being that we pointed you in every direction but that...I'd say no.

1) how does the crossover pipe come off? sorry, misread/understood earlier.
2)would the 171, if it were EGR tube, cause THIS bad a misfire? in gear, revving it up, foot on brake, it wont go above 2000 rpm.

Just drove it about 5 miles or so, after cleaning coil contacts. First time being driven in a month.

It does a rapid backfire during acceleration. When I'm coasting, its smooth. Slight backfire while accelerating until I start really trying..hit about 55 or so and its a rapid PPPPPP backfire.

Where do I go from here? I feel SO close I can taste it, since a month ago if you hit 55 it just wouldn't respond to me. So I'm so close. Any ideas?