Hey,
my 95 vs sometimes will idle up to 2,000 rpm in park and when i put it into reverse it will go back to 1000 which is pretty usual then when i go to take off in drive the car's revs drop so low it nearly stalls ..
Also when coming to lights and the gears drop back down and i stop the car idles really low almost stalling... I Took it to the mechanics and they reckon there's nothing wrong with it only that the idle cable (i think its called) has allot of carbon and they cleaned it...
It was fine for about a day then went back to its old tricks any ideas?
The mechanics probably cleaned the IAC - Idle Air Control...seeing as it fixed your problem but then went bad again would point towards this unit still playing up. You can clean it up yourself - do a search for instructions or check in the "how-to" section.