I just gave my 2000 FFV to my son but there is one problem that I haven't been able to fix. The truck has an intermittent buck that neither I nor my mechanic have been able to figure out. Research on this and other forums suggest the problem may be a bad EGR valve. There are no error codes and I don't want to swap out a bunch of parts for no reason but I did have a tuneup done with new wires. The truck has 46,000 miles on it and has had few problems otherwise. Does anyone have experience with this and how difficult is it to change this valve. Some have suggested that it should be changed every 50,000 miles anyway so there is no problem with doing this maintenance. Any help would be appreciated.