Running Rufff

Car runs ruff. poor idle seems to miss on couple cylinders. change plugs,wires,coils

both sensors.cked ground ok,idle air control valve (not connected )runs somewhat smoother.replaced didn/t help

What else can cause this problem. has 100k miles

Check for vacuum leaks and try cleaning your mass airflow sensor, if the car is equipped with one. Only use cleaner specifically designed for mass airflow sensors to clean it. CRC makes such a product, and it is sold at most auto parts stores.