Mine also is a 95 V6. The engine on mine idles so smooth that you can't tell it is running! This engine idles better than my 2001 Saturn!
It really is hard to say without more info. Could do simple inexpensive changes first. Replace the fuel filter, replace plugs and check old plugs for oil fouling, etc. check vacuum lines to see if they are cracked or broken. Change PVC valve.
Hope this helps you get stated in the right direction!
Regards,
BT
