Hey guys I have a 2003 ford f-350 that has 207,000 on it, it starts great cold and runs great, but for some reason once it has got hot mad run for awhile it starts really slow, like a long crank. Anybody have any ideas or any further testing that I can do? Thanks for all of the help in advance!

 

A good place to start would be your high pressure oil system. Take out your icp sensor rig up a fitting so you can run some air into it see if it holds pressure also most time you cam hear actual leaking.