96 7.3 no start when warm

[csanderlin]

7.3 is having a hard time starting after running for around 30 minutes and then shutting off has a new IPR valve new ICP new crankshaft sensor and injectors. Starts up fone when cold. And runs great just wont restart without wait I couple hours. Any ideas

 

[Croatan_Kid]

A buddy had a very similar problem. Turned out to be a partially stuck open pressure relief valve in the HPOP. Sounds crazy, but it fixed it entirely.

 

[mysterync]

You'll need a scan tool to watch the pids while starting. If it won't start and icp pressure is lower than 500 you'll know to look into the hpo system. If it's above 500 or so then your looking for something like a cam sensor. You really need a scan tool. Anything short is guessing.