I've been having a problem recently when starting my truck after it has sat for 8+ hrs. It will fire off and then die. Turn the key off and restart the truck and it'll run rough for a few seconds and then lines right out and runs perfect.Almost like it is getting air. I'm about to make a 3000 mile trip pulling 10k+ and would like to get this resolved before leaving. I'm thinking fuel pump problem and haven't had the time to check it out. Do you guys have any ideas as to where I should start, or other ideas of what it could be to save me some time?