This is just a thought, but you might want to clean out your throttle body and Intake Manifold with a good cleaner like that SeaFoam stuff, or a similar product. When I cleaned mine out good, not only did it shoot a lot of nasty crap out my exhaust(carbdon depostis, etc.) it smoothed out the idle a lot and made the throttle repsonse better(I have a 95 LS teg with 145,000 on it). If you want any info as to how to do this, PM me and I'll give you some details, but it's pretty much self-explanatory. I also did this for my fiancee's car (91 Accord with 180,000 on it and made an even bigger difference on her car). Just my $.02 though.