1998 150

My truck will drive fine but sometimes when I stop at a store and shut the engine off for a short period of time it will start for about 1 second then turn itself off. When cranking the engine over after it stopped it will crank and crank over but willnot start. Im thinking that some sensor thinks the engine is too hot and tells the computor to stop the engine but that is just my guess. Oh engine is 4.6 ltr. My first post had no decent info. Hope this gives better clues what my problem is.