[fdunford]

EGR is not scheduled at idle, so the EVR shouldn't be causing a rough idle unless it's failed on, or your plugging a vacuum leak on what your touching.

On mine I seem to remember another solenoid back there. I think it also has electrical/vacuum lines also. I think it may be the purge valve? I think purge is scheduled at idle but again,it may be electrical/vacuum lines.

I'd suggest checking the connectors and pins on each solenoid as well as the vacuum lines. You did clean the IAC already, right?