hey guys just got this car 2 days ago i have done simple work to the car ie. gastank and fluid flush. the car starts but not to good it has a really rough idle and the throttle has no effect on the rpm. ther was a few times that when i held the throttle down all the way all the sudden the car came to life but if you let the rpms drop again it would stay at a rough idle with the throttle having no effect. please anyone out ther have any ideas.

ps. prevoius owner replaced the distributor cap plugs and wires and put in a new ecu rebuilt motor

If you haven't put in a new fuel filter, I'd try that first.