Where is the egr valve located on a 1990 plymouth grand voyager?

I used to be able to tell you, but I can tell you this- look at the exhaust system follow from the headers until you see a line going from there to a component located on or near the intake manifold. if not that set up then look for a device that has a large( about three to four inches in dia.) mushroom looking item that has a hose going to it that is on the intake manifold.