I have an 05 F250 6.0l. I recently started running into the truck starting up fine when its cold but when its been running for awhile and i shut if off, it wont start back up and just cranks and cranks. I just changed the ICP and that didnt help at all. I'm thinking it might be an oil leak or the start of my HPOP taking a crap. Is there any way to get a for sure answer on which one it might be or if it is anything else? Thanks.