Can anyone tell me exactly where the EGR valve is located and what does it look like? Thanks!

i'll check tonight if i can find it....it is probably in Haynes book that i have. if i do find it i'll post it to you tomorrow (wednesday)

my geo has a diagram under the hood showing the location

i haven't there!! (i have played with the mototr though) but i do have it in the haynes book.

bolted to the side of the engine head, in front of the distributor. Has a couple vacuum lines hooked up to it.

It's a round diphram with a vacum line & located at your intake if you have one. 90 or older may not have one.