I have a 2001 XLT 5.4 - here's the problem. When I start it, most times it fires right up, but if I turn it off, when I try too start it up again within any time less than a couple of hours, it sputters, kicks and won't start. If I try to start it several times, it will usually start on the 5th or 6th try, but the temp gauge is all the way to the top (H). This will happen even if the engine isn't hot/warm. Other times, it just won't start, sputter, etc for about 5 or 6 tries and then start. Sometimes it will start but sputter and jerk for a minute or so, and then run fine. Anybody have any ideas? Thanks.