What next?
 

I am the owner of a 2002 ford f-350 7.3 Diesel. The truck has 175,000 miles on it. Driving home from work the truck died at a stop sign. Started up after a few tries. Died three more times on the way home. Then it would just turn over but wouldn't start. Found this site and went to work. This is where I need the help. I have replaced the CPS, fuel filter and I have oil in my HPOP. These things I have pulled from previous threads as possible causes for a no start. What is the next step?

alternator?

Are you getting any smoke while cranking?

Is the tach moving while you crank?

Is there a WTS light?

Have you checked every single fuse, not just visually but with a meter...

Just because there's oil in hpop doesn't mean its working correctly, cheap way to test it is build a hydraulic gauge and pull hpop line off and see what its reading while cranking.

It isn't necessary to take the lines off. There are plugs in both heads into the HPO system. they are 1/2 inch straight o-ring threads. I used an old high pressure dive tank gauge with an adapter from the 7/16 to 1/2 threads to test on my boss' truck.