I have had this happen to me 2 times now, it seems like there is air in the fuel system. it just turns over and after cranking for maybe 20-30sec it trys to start then it does start. i have a small leak on the ip, it is where there 4 line block bolts to the pump, small leak only a drip now and then. its only happened twice, once after sitting for 3 days, and once after sitting only 12hrs. i guess it could be a number of things but it seems to be air in the system, any ideas?