Will not crank hot

When the problem occurs, it cranks good but won't start? If so, have a helper crank it, while you visually check for spark at the plugs, you can carry a known good spark plug or spark tester in the glove box, they won't get hot, if plug wires are, use a glove, pull spark plug wire off spark plug, use tester in plug boot, ground metal part of tester to metal part of engine, watch for spark, engine cranking. You know, drive around the block or whatever, to get it warmed/hot, pull back in your driveway, do testing. If you have spark everywhere use a gage and check fuel pressure, not only check proper fuel pressure, check that the pressure doesn't drop like a rock, with everything off. Be careful don't let gas spray all over a hot engine.

If you have a fuel pressure regulator leaking, it could cause a hot restart issue.