rpms drop and check engine lights on on 1996 Mitsubishi Eclipse

my check engine light has came on like 2 days ago and when that came up my rpms have been dropping to (300-400) when it in idle (park) or at a stop sign/light and the engine seem like it want to died. i also seems to have a lil drag on picking up,not sure if its the same prob or something else. plz help me asap .. i need my car haha

1 answer
You need to have the computer coded out. Being a 96 it might not be OBD2 or require a special cable. Try going to a auto parts store and see if they will be able to pull codes. If they can it should be free.