[WrenchN]

Hey anyone on here clarify the test for me...
Made my connection to ICP fitting and charged it with 100 psi and powered IPR for a short time and barley saw a drop in pressure. Before powering IPR valve I can hear it draining, which I assume is normal. This damn truck has been a nightmare last few weeks, not the only truck in my fleet so I only work on it here and there. I have a scan guage II, and with a new IPR valve it still goes from 14.8% right to 84.8% when cranking and little to nothing on ICP reading, which gives you your HPOP pressure reading correct??

I replaced STC fitting on pump it had movement in it. Replaced dummy plugs and stand pipes on both rails. New bottom seals on HPOP. And no start still....

And also my cam and crank wont sync on SGII. One of my other running 6.0's sync's up after it fires off. My other one sync's up during cranking right before fire.

Any help would be appreciated. I have both harness' out repairing FICM clips and checking for chaffing. Have to be missing something or not understanding something....

Thanks

Truck is bone stock, 131,XXX miles

 

[ByronF350]

How long have you cranked it? you need to get oil back into the system. Also have you tried un-plugging the ICP sensor and tried starting it?

 

[WrenchN]

Byron,
I cranked for awhile thinking that was the issue, no change. I unplugged ICP sensor to give it the default psi and nothing. With 100 psi of air and IPR valve powered on and no pressure drop on gauge nor hear a leak then high pressure oil should be leak free and good right??

 

[Maryland dieselnick]

Hi, so it appears it hold pressure but will not build it. Is the drive gear properly torqued?
I'm not a 6.0 guru but if the system will hold 100 but not build it, ide work backwards.
As far as sync goes, the ones I have noticed synced upon turning key on but I'm not sure of the years and do not remember.

 

[ByronF350]

I'd say next step would be to swap in a known good FICM off of a running truck.

 

[WrenchN]

I did that Byron, because I don't have any FICM main or FICM logic on this truck with a 3 month old FICM. But before I send it in for the FICM warranty I want it to start with a known working FICM. So with known working FICM out of my other 6.0, we have good main and logic FICM power, but still 84.5 duty on IPR and little to nothing on ICP and no sync. Didn't get to work on it today, have a 7.3 tranny issue am T/S'ing.

 

[bismic]

You need to get proper ICP pressure before worrying about other components (like FICMs).

Pull the IPR valve and inspect it.

Did you buy a Ford IPR when you replaced it or was it an aftermarket one?

After all is said and done, it could be your HPOP. The later model pumps are fairly reliable, but they do fail occasionally.

 

[WrenchN]

bismic,
That's what I am fighting for as of now...

And IPR valve was bought through NAPA, our local Ford dealer was plum out when we replaced it...is it kind of like the 7.3 cam sensor, don't buy it unless it says motorcraft on the box?? lol

Leaning towards it being a weak pump, air test might be good but that's only going to tell you that you are sealed up, if your pump cant build the pressure than you are up ****s creek and out of fuel.

Unfortunately I don't have another 05+ laying around to steal pump off of, my other 6.0's are 04 and older, older style pump correct?? When I did STC fitting, the pump turned without restriction, and shot oil all over me, I remember being pissed about that...so its not ceased up or anything but doesn't mean its not working up to pressure.

I am about to go put harness' back in truck, steal a known working FICM and go see if I cant get it to build pressure again. Now have a battery charger large enough to help with cranking.

 

[bismic]

Yeah, I wouldn't ever recommend buying an aftermarket IPR, but I understand the situation.

You can test the pump by "dead-heading" it, but you need block-off tools From Ford/International.

I would still pull the IPR again though, after disconnecting everything that you did, it is easy to get some small trash in the system and plug up the IPR.

 

[Ford06]

There was another recent thread where a guy did all of the upgrades and still had high IPR readings. Turns out something had gone through the new screen on the IPR and lodged a piece of screen in the valve. He cleared the blockage, put another screen on and it was OK. When you open them up things can get in there even if you are careful.

 

[WrenchN]

Well gentlemen after a few weeks of messing with this truck and no more hair on my head, she fired off today!

I finally got the crank and cam to sync up, and after pulling the IPR three times to clean **** out of screen, I got the oil pressure up. All the numbers were right that I couldn't get before, still no fire. Checked fuel filter bowl up top and it was bone dry, no fuel. Changed both fuel filters out and cycled key on about a million times and finally fuel came pouring out of bowl. Cranked truck two more times and third time she woke up. Man what a freakin' nightmare. Truck gets loaded on lowboy in the morning and shipped back to shop that installed FICM to have it warrantied out for new one and then she will be on the road again. Thanks for everyone's replies!