How do I set the idol? Seems to be idoling rough and stalling. Help Please

The idle is controlled by an idle control motor controlled by the computer in your car looks at input signals and then decides what speed the idle should be. Basic diagnostic tests are needed to see if the rough idle and stalling is caused by an ignition failure, a vacuum leak, fuel issues or loss of a key input signal to the computer. Hopefully it is something as simple as a bad vacuum hose or spark plug but it is impossible to guess without being able to experience the problem first and and do basic test.