Hey guys. I just bought an 05 F350 and it starts fine when cold but after I drive it a while will not start even after sitting for up to an hour (overnight cold start fires right up). I replaced 1 battery and alternator and it started up right after install but after driving for a while still have the problem - cranks fine but will not start.

Buddy of mine has the same truck (just a 250) and had this same problem recently and had to replace the High Pressure Oil Pump, which was super expensive! Thoughts?

This is my first diesel truck and it runs like a champ (once it starts!) Thanks!

 

Very likely HP Oil Leak on your 05, likely your STC Fitting on the HP Oil Pump or the dummy plugs. 05-07 HPOP rarely fail.

Air test to determine point of leak.