How was the screen that was under the oil cooler?

 

how was the screen on the IPR Valve???

Your symtoms being that runs better with thin Oil vs running Bad on thicker oil Point to the FICM. When the FICM Poweer side fails it get low on power then it has a Hard time to Open/Close the Injector Spool Valve. This spool Valve Open/Closes the the Path for the HPO to Act on the Injector Plunger and the plunger drives the Fuel into the Cylinder.

It could also be Worn injectors

Scaning the truck is Highly recomended before teardown.

You can look at ICP and IPR% to verify HPO System Health for the Most part if you get Bad numbers when checking then you can Air Test to find leaks

Since your so far in a OIl Cooler R&R would be good

 

The wrong Oil Filter and Or Oil Filter Cap can cause issues to

Do you have the OEM OIl Filter & CAP????? this is important

along with the Condition of the IPR Screen

 

being in it so far, I would probably change out the HPOP also - just because I HATE doing things twice!

 

filter and filter cap are genue (International)

I'm confused a bit, HPOP is not so cheap thing, it is made by Bosch and all Bosch things are expencive

 

I hear what you are saying (around $500), but the early HPOPs had a failure rate that would have me concerned about its longevity. It is 8 years old already. It woudn't be like you are changing out a NEW part (unless it has been replaced recently and you haven't mentioned it).

 

According to the pictures you've posted in posts #2, #3 and #4, you definitely have what appears to be a 2004 model year F-350. I didn't catch the last five digits of the VIN or I would've been able to run it, to see the exact build date of this truck. I agree with Mark on replacing the HPOP if the mileage is high and the oil was black, indicating neglect on the maintenance. I would definitely replace that oil cooler too, judging by the appearance of the coolant passages in those pics, it looks plugged up solid.

As far as the oil filter and filter cap are concerned, they are definitely NOT the OEM style, from what I could see in the background pics you posted in post #2. So the next course of action is to purchase a new original filter and filter cap as well.

Now, regarding your original concern, what exactly led you to disassemble the engine apart to the extent you have posted in your pics?

 

[quote=m-chan68;12257587]According to the pictures you've posted in posts #2, #3 and #4, you definitely have what appears to be a 2004 model year F-350. I didn't catch the last five digits of the VIN or I would've been able to run it, to see the exact build date of this truck./quote]

Mike,

Of topic question. How can you tell it's an 04, F-350. If you look at the VIN I understand, but you base on post 2,3, and 4 and determine that it's an 04 F-350 all I can say is WOW!

 

I based it off the sixth photo down, in post #3 of the VIN. What I was able to read was 1FTSW31P44EA..... and I missed the last five digits.

The '3' in the VIN denotes an F-350. The 'P' denotes it's equipped with a 6.0L diesel. And the second '4' of the VIN denotes it's an '04 model year.

 

10th character denotes the year (oops, too slow ...)

 

ouh, I'm home now, truck in garage, I'll post full VIN a bit later.

 

Thank you Mike and Mark

I even misses the aftermarket oil filter cap when looking at the fuel filter housing

 

some success! After taking apart all the high pressure oil system and cleaning all this stuff with jet fuel and solvents oil pressure fault codes dissapeared, engine starts.

Powerstrok 6.0 - YouTube

But runs a bit rought. Sometimes ECM trhrows wierd fault code P134B. And I can see that engine load is too high, about 36% at idle, so I sugest worn injectors.

Any tips gentelmen?

 

How do you know the HPOP is good???

Give us some readings .............. ICPvolts, ICP pressure, IPR duty cycle, FICM volts, etc.

Any parts changed out?

I don't doubt that the injectors could "take it on the chin" with a neglected oil system.

 

I think what these guys (who are 6.0L experts, you've hit the jackpot here) are trying to say in a nicer way, is
STOP
trying to use your previous experience with other diesels
You need to give them the readings they're asking for from the monitor so they can help you actually troubleshoot this engine, it's NOT like other diesels!