2005 Ford 6L no start when hot. - Ford Powerstroke Diesel Forum
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Old 02-09-2014, 03:21 PM
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2005 Ford 6L no start when hot.

Hi yall new to the forum and really hoping somebody can assist me is figureing out exactly what is wrong with my truck.

I have had this truck for 2 years and the hot start issue started about a month or so after I bought the truck.

This is the complete list of parts that have been replaced and still continues to not hot start:

Stand Pipes/Dummy Plugs
all injectors re-sealed
New STC Fitting
New Branch Tube

Since then I recently attempted to save myself a ton of money and diagnose the truck myself. I pressure tested the systed with the IPR activated, while cold, and it was air tight. I tore into it a little further, I visually inspected the orings on the new stand pipes and dummy plugs, and while re-oringing the injectors the rings I pulled off were brand new.

I pulled the LPOP and inspected the gears. There was some verrrrry minor knicks and scratches in the gears but that was it, I was told the gears are fine and to just put them back in.

I was guided into thinking that I may have initially replaced the HPOP with a weak pump from the get go, so I replaced the HPOP, IPR, STC and resealed the injectors and put the truck back together.

Truck cranked up after 7-8 long cranks and sounded a ton better than when I took it apart. Now that the truck is back together it still does not hot start... If I am missing something please let me know, I plan on air testing the system while its hot to see if that will find the problem but other than that I am beyond stuck. I have also attempted to start the truck hot with the ICP unplugged and no dice there... it starts better with it unplugged but not right away.
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Old 02-09-2014, 09:09 PM
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You last statement leads me to ask what did the front cover look like, it is the back of the low oil pump. Have you ever actual tested the low pressure system with a mechanical gauge.
Clearances on the gear pump are pretty tight doesn't take much of a scatch or nick.
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Old 02-11-2014, 01:13 PM
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the o-rings in the top of the injector where the oil rail seats leak. you will have to get it hot, take the valve covers off and check it. with A LOT of air pressure. remember it leaks getting to 600psi of oil pressure. most shop air only gets to about 150 psi. get it hot, hook it up, and let it sit for a few minutes while you pump air into it. i wouldnt imagine it would be low pressure oil. but 05s in particular have an issue with the injectors leaking. not sure why, same part numbers as 06 and 07 but it seems only the 05s leak. good luck.
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