'05 6.0 Type of Limp Mode

[DieselDix]

Hey all I drive an '05 6.0 and this morning it did something crazy on me. Let me set the background here, I went out this morning and unplugged the truck, started it and let it warm up for about 20 minutes. I got about a mile down the road and lost all power, the truck was still running till i pulled over and than it died. The truck turns over but won't fire. I didn't get an engine light or a water light. I can't for the life of me figure out the problem. It ran just fine last night and all of the days prior to this incident. Please let me know what you all think.

Thanks, Branson

[dhanna6powerstroke]

HPO leak. Either an STC fitting, stand pipes or dummy plugs.

[DieselDix]

How hard is it to replace the STC fitting or the stand pipes? I just repalced the dummy plugs.

[dhanna6powerstroke]

Gotta remove the HPOP and oil rails. You need to air test the system first though just to verify.

[KFord]

Branson,

Good luck.

[DieselDix]

Alright thanks for the help I do appreciate it.

[Tuscany]

Yeah you need to leak test the HPO system by taking the leads to the IPR valve and hooking them to a constant 12v source. This closes the IPR and seals the HPO system from the LPO system. Then make a fitting that will screw into the HPO rails under the valve covers and hook up your air compressor to it. Listen for any gargling in the system and air escaping. Also pull your oil filter lid and listen for gargling in there. If it is gargling you need to find out where from and replace defective items and try again until all leaks are gone.