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The IAC vavle is located behind the EGR valve on the driver side of the motor. You will disconnect 2 hoses and unplug the wire harness from the system. The unit will come right out. Just make sure that the hoses you take off go back in the same place. Also make sure that you have the negative battery wire disconnected. I had this same issue on my 2001 Escape, had to replace both the EGR and IAC so check both carefully.
I will try to help. Has the "check engine light" come on at all? There are 2 main reasons for a hole. Too much heat from not opening or excessive manifold pressure. Do you get backfires?
What I can suggest is to replace the EGR and connect a "T" fitting to the vacuum line and temporarily run a vacuum gauge to the interior. Then you can monitor if the EGR is even getting a vacuum signal.
If it destroys yet another EGR there must be a burn through inside the manifold and you will need another manifold.
This might sound crazy but it works with these Escapes most of the time. Go buy a can of Seafoam from your part store. With the engine off, disconnect the brake booster vacuum line and place it in the can of sea foam. Start your engine and keep your foot on the gas pedal and keep the RPM's around 2k.The vehicle is going to smoke like crazy for 10 minutes or so, when the smoke clears up for the most part, go drive it for a couple of miles and see if that helps. It cleans out the carbon buildup from you intake and sensors and takes care of that code you getting most of the time. OR, you purge canister needs to be replaced...