I have a 1992 Oldsmobile Toronado and lately the when I drive around a little bit then sit in park or stopped at a light the engine revs up in RPM's. Also, while I am driving it almost feels like the car is shifting in gear for some reason and also seems to slow down a little bit. The engine light comes on, periodically the brake light comes on, and now the heat isn't working. Also the "check coolant/antifreeze" display comes on even though it has it in there. Any solutions to these problems?