when you start the car it will idle fine for a couple of minutes then the rpm's start falling and jumping . while driving it runs really ruff the transmission shifts really hard . the people we bought it from weren't very honest .alot of the wiring was rigged its got new wires,plugs,cap and rotor. its a fila car.
LOL! another fila on here! so its an 84 V8?
Bad idle could be egr, injectors, or a vac leak. Trans shifting bad could be due to a mis adjusted TV rod.