First of all, welcome to CEG. Now, on to your problem. Even if it is possible to somehow repgram the pcm to control idle speed, I would recommend against it. All you would be doing is masking the problem and it would still be there. I too have a 95 2.0 automatic. For the longest time my car would vibrate at idle and it turns out that it was my transaxle mount that is on the left hand side bolted to the fender apron. I replaced it last weekend and it made a 95% improvement in the vibration. Now, the motor still idles low and i'm still working on fixing that but I can no longer feel the vibration inside the car or at the steering wheel. I also need to mention that I have now replaced every single engine/tranny mounts on the car. If I was you I would check them out and replace as necessary. Good Luck
