Just cleaned my "EGR" valve. It was pretty easy. I soaked all the bolts down for several days before I removed it and it came right off. I then blew compressed air through the vacumn line and watched the diaphragm open and close. I then soaked the non diaphragm end in injector cleaner for about 8 hours. I also cleaned the egr port in the intake plenum with some throttle cleaner. The idle improved and my ses light went out for about a month(came back on saturday but not sure for what yet.) Hope this helps.