sometimes starts, sometimes doesn't

[hardhatz]

2007 6.0 starts nicely about 1/4 of the time I twist the key.
The other times it cranks well but does not fire. Extended cranking does not help. I have changed the filters, and changed the oil, no difference. No codes. Help!

[hardhatz]

Today it was very hot, and I just realized this is the 2nd time my truck has utterly failed me, and both times were very hot. Today it would not start period. Cranks over just fine, seems like a classic case of Heat Soak.

So, I grabbed some ice in a plastic bag & went look looking for components under the hood. Cooled of the electronic item on the right valve cover, no change. Cooled off the aluminum box on the left valve cover that is about the size of a laptop & it took right off. What is that device? Was is the culprit, or just coincidental?...

2007 6.0 PSD

[Powerage]

Left as in drivers side? If so that is called an FICM. It's what controls your injectors. I think they will throw a code when bad though. Did you wiggle any wires around when you were in there putting the ice?

Electronic on other side is your glow plug controller.

[hardhatz]

Thanks for responding, I was thinking no one would. After my posting, my initial experiment could not be repeated. That ruled out the FICM as the problem.
I went to my local Ford agency, and they said it was probably a high-pressure fuel leak, and wanted $1500 to diagnose it..

I have the truck apart now. My research convinced me to check the HPOP connection. I took it apart & sure enough, the fitting was blown out. Interestingly, the Ford kit is $65, and the International kit is $29 & has about twice as much stuff in it.

During the process, I dropped a bolt down the back of the motor
Pulled the pan, not there. Had to pull the trans & remove the plate on the back of the block to access the timing gear cavity. It was wedged behind the cam gear. I put the trans back in today & as of right now (9:30 pm) I think about 4 or 5 more hours will do it.

p.s. when you work on the HPOP please be smarter than me & stuff rags around the opening so you do not get to spend couple of days getting bits out.

[Csolomon]

i know what you mean... i did the same thing when i chaged the HPOP fitting on my 05 and i droped a small piece of metel down there but got luckey and fished it out with a magnet... yet ragges are your friend when you open that cover...but i guess some of us just have to find tha out the hard way

[catskinner222]

I'm having troubles firing up after my hpop rebuild any ideas

[Csolomon]

it usally takes a long crank to get it back going again but im not 100% sure mine personally took forever to finally start

[hardhatz]

If you have a late-build with the IPS on the right valve cover you could take the sensor out & crank it until you get nice flow of oil. I started mine by disconnecting the glows & adding some penetrating oil & propane, but experts caution against assisted starting.

Sadly, I have other problems which seem to involve the wiring harness..