The EGR plate is pretty easy to clean, and I re-used the metal gasket with no issues on mine. More than likely the problem is the EGR valve itself, though. I got one for Ron Burgundy for like 55 bucks with a gasket and it works great, here's the link
http://ecomodder.com/forum/showthrea...tml#post474729. That's a five minute fix, while the plate cleaning takes about an hour
You'll need one of those knuckles to be able to remove a couple of those bolts on the EGR plate btw, and keep a magnet handy for when you drop one into the bottom pan
I keep my RE92s at 60 psi with no ill effects, I kept the Maypops on the Festiva at 50 psi and never had an issue with them either.