:: Problem, Any Help Appriciated ::

My moms 95' Oldsmobile Eighty Eight revs at like 5k rpms for like 10 minutes when she first starts it up... Sometimes while driving she'll take her foot off the gas and it'll rev up again... My first thought was maybe the transmission... But when its parked in neutral the transmissions not engaged so... Iono have any of you experienced similar problems on your cars?? Just need some ideas... Thanx...

i have an older 88royale i had a similar problem were it would run to fast for a few minutes on my car it turned out to be the automatic choke but on the newer 88's it might be a throttle body problem. good luck