need help with my truck it wont start when is hot

[martinezguad]

the truck is a 2004 f250 6.0, here is the problem when it get hot it wont star until it get cold, the truck has 174k miles i took it to the dealer where a friend work he is a diesel mechanic what he hasnt find the problem he sid that we are not getting enough presure to open the injectors,he check the injectors and said that #7 was leaking bad,he changed it, no fix,he change the hi press. oil pump,no fix,he been traking it with no luck, he has change a bunch of gaskets and o-rings but no fix, its getting better but still wont start when is hot if the truck is lower that half in the water temp. it will fire but it get half way and you have to way until it get colder, if any one has any ideas, i will really apreciated.....:dun no:

[00strker]

i dont think its any help lol i had a dirt bike that would start fine when it was cold but not after it ahd ran 4 a bit and the prob was low compression maybe after it warms up the rings are shrinking and lowering the compression

[martinezguad]

ok i ask my friend to check th compression, but how can you check it in a diesel???

[00strker]

hell i dunno

[wtprez]

It sounds like the HPOP to me. Maybe a tech will be along soon.

[martinezguad]

help from a tecch please

[Evil Eye]

I'm pretty sure it's the quick disconnect on the HPOP; that's what mine was. They have a TSB about it.

[martinezguad]

whats a tsb??? and i just have to tell them to check in the quick disconet..thank u

[Evil Eye]

Technical Service Bulletin from Ford. It tells the techs what to look for when diagnosing certain common problems.

[SDLooksgood]

As most said, sounds like it points to the HPOP. I went through it with mine. Had the truck no start on me in the middle of ordering Wendys (dude couldn't hear me inside) Three hours later when the truck was cool it fired right up.


In the 6.0 bible, 3100 PSI is needed to fire the injectors, short of that and your out of luck.

Wow!