[angrydan]

If the idle is really rough, you could have dirt and junk in your fuel lines, or a clogged injector. This recently happened to my brothers Firebird. It was idling all over the place and would go from nearly stalling to revving over 2000rpms. I took it to my mechanic and he flushed out the injectors, fuel lines, and changed the fuel filter. All in all, a cheap fix. It's worth a shot...