i started her she shut off , i started her again gave it some gas i heard a pop and smoke come from under the hood.. i shut her off , i restarted her and if i dont give her gas she shuts off , i gotta keep my foot on the gas ......

Check Vacuum line hoses on manifold on left rear of engine valve cover. One of them is likely loose. When this occurs, it will emit a loud pop and create a puff of smoke and will not keep running properly, and engine will shut down, without giving it gas. "Hope this helps and resolves your problem."