Help with Ford Ranger 4 cylinders 8 spark plugs

That I am new in this but I want to learn to solve facile problems I hope they help me thanks

well as I said I have a ranger 4 cylinders 8 spark plugs the problem that has this when I turn on the first time does it correctly. Because of using it and off it, in a period of a short time I try to turn it on and no longer ignites if it goes but it does not start the engine. Well I hope you understand me and help me very much