Rick, don't have them rebuilt on my diagnosis, that may not be the problem. Like I said, you are in Va., and I'm in Il.
Try a bottle of techron (20 oz) to half a tank of fuel, and then some spirited driving to try to clean the injectors out first, and see if that makes a difference. Most of the time that will clean the gunk out.
Most of the time, they just clean an injector really good, and call it a rebuild. It's just like a needle and seat in a carburetor, but it's controlled by electricity, rather than by a float.
If you haven't read this:
http://www.amazon.com/dp/0837603005/ref=nosim/?tag=dealtime-books-20&creative=380333&creativeASIN=0837603005&linkCode=asn , I HIGHLY recomend it. After all , all the data in the world means nothing, if you don't know how to interpret it.