Hi Guys!
Paula here...again:-) Well, I actually decided to give Graeves Autoshop in Olney, Maryland a whirl. They were very nice and didn't charge me to take a look at it. The problem is, all they did was hook the car up to their machine and clear the CEL. They then took it for a spin and the light didn't come back on. I was happy to pick it up, but halfway home DAAAAAAAAAA DAHHHHHHHH!!!! The evil CEL reappeared

. So, it's back to the drawing board. What I'm going to do next is all of what Ray suggested. Hopefully, by doing some of those tests, I can figure out the problem. I shall keep you all posted. In the meantime, let's all pray to the great Contour God in the sky. Right now I'm off to watch America's Most Wanted

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Oh, REAL QUICK...if I were to go and buy an EGR valve myself, about how much would that run? And would they have them at ANY auto parts store? Thanks!
Paula