It is as Dan says, to my recollection. I believe it is a composite throttle assembly.
On the top of the throttle passage will be a cavity that allows the IAC air to enter into a passage on the Intake Manifold. It is in this passage you will find you need to pay some particular attention.
From the back side of this passage, make sure it is cleaned very well, then take a drill bit and scuff the surface well. Your bit WILL cut through here, and likely to cut through in two other locations that are well-hidden by some of the casting, so INSPECT IT WELL!
Apply a generous amount of JB-Kwik in the passage on the exit side of the throttle against the ledge. (you'll see it when you pull it off). Then, go ahead and cut The Groove. Once The Groove has been machined into the throttle body in the right location, take the throttle into a dark area with a flashlight and make SURE there are no "Light Leaks". Find one, then fix it.
If you ever finish a job on a drive-by-cable assembly and the thing surges, the ONLY cause I know of is (guess what!) A VACUUM LEAK. Only in most cases, it's because of one created by the machininR be checking your work!
A little patience is a wonderful thing. So is asking about something BEFORE you do it!
ESPECIALLY in the case of the composite Ford throttle bodies.
Take lots of pictures, do a video of this throttle body as an "ALERT" and I will upload it to the YouTube GroovyServiBulletins channel.
The same for all of you out there in Gadgetman Land! Let's help one another avoid these little snares by sharing information!
Oh, and the Escape is going to LOVE that Groove!
Ron