NO START

[dually04]

I have a 04 F-350 with the 6.0. I pulled into a grocery store and went inside. Came back out and the truck would not start. It would turn over very easily. Never had a sign before any thing was wrong. Plenty of power. Can someone give me some insight of what this might be. Haven't changed the fuel filter since I have bought the truck. Any insight would be of great appreciation. Don't understand, one minute everything is good and 5 minutes later truck won't start.

Thanks
Nate

[SCUFFY828]

high pressure oil pump maybe

[460+]

How many miles is on it? And also have you had a chance to get any codes pulled yet? Could be a crank sensor or what scuffy828 said. Im working on one right know with the same problem it hpop orings blown. This one has no codes.

[dually04]

I have 300,000 miles on it. The only thing that I have done to the engine, was replace the oil cooler. I have not pulled any codes. Do you know how the oil pump could keep it from starting??

[S.S construction]

if it doesn't make enough pressure it won't let the motor start

[thorx4md]

Where exactly is the HPOP located and how hard is it to change the o-rings?