I still start with a checking the codes, you might have something stored. I also look at teh vac lines, make sure the are connected and not dry rotted, I beleive if the fuel regulator vac line is dried or not connected they run very rich. Good luck
Evin, its been a while. Glad to see your still around, welcome to the site. I have a welcome thread myself so you can see my car, its been a while since you saw it.
Joe