have a 2000 F150 4.6I get in it every morning and it starts up I drive to work runs fine. I get off work try to start it it wont start turns over cranks and cranks . The weird thing is i can go back the next morning and it starts up first try but then when i drive it and shut it off it wont start back up again tell next day. Can you give me an idea what to do please .At one point I could bang on dash and it would start but yesterday that trick didn't work. I noticed when it is above 70 outside this happens more often.