engin on 1995 Hyundai Sonata

engine not steadily while it work

Asked by for the 1995 Hyundai Sonata
If the Check Engine Light/Service Engine Soon light was on or is presently on a scan tool will be required to retrieve codes stored in the on board computer in your car that may indicate what is causing the rough running.
1 more answer
Most likely it needs a tune-up with plugs, wires etc.