Ok gents thinking caps on please!
I have read a lot of posts that are similar to mine. I have a 2005 f-350 6.0 with 90 hp injectors, large htt turbo, egr/oil cooler delete, edge monitoring display, and sct programmer. I am fairly new to diesels but understand a lot more than a newb. What is going on with mine is similar to what others are having. I am driving down the road in heavy traffic and it dies like I shut it off, restarts 2 maybe 3 times then will not restart for half to a full hour. When it restarts it runs like a champ. After a hard pull (8 to 10k) if it idles to long it shuts off and will not restart for half to full hour. This weekend knowing all this I preemptively shut it off after pulling my trailer, went to restart and nothing. One hour later fired off and runs great. I have even had it shut off in traffic waited a half hour, fired it off and drove in heavy traffic for 2 more hours and runs great. I thought it was a few different things so I set my pid’s to monitor ICP pressure, ICP voltage, FICM, IPW, and here is what I get.
ICP pressure, starts at 800 and drops to steady 650
ICP voltage steady .9v
FICM v. steady 48
IPW injector pulse width. 0.0
I am thinking IPR, stc seal, or ? I never throw any DTC and everything works great. Any help would be greatly appreciated.

 

HPO Problems you have classic symptoms

Standpipes,D-Plugs, leaky STC Fitting

best to replace all 3 items and use updated parts you wont have to worry about it anymore


Would be Good to verify these sensor at KOEO.Cranking,2500RPM in park A/C Off

ICP
ICPV
IPR%

And again when it wont start

 

is it just leaking seal or whole pump replacement?

KOEO?

I do not have an IPR PID

 

Just a leak for Now

if its a Leaky STC it my blow all the way out then its a Tow Job
usually just a Leak though

your truck has a GREAT HPOP 05 has updated HPOP

 

So pay the 2 hun and replace all three? should fix the problem?

 

AT a minimum get some readings from gauges just to verify the issue

you do have the classic HPO Leak when HOT Symptoms though

are you doing the work???or a Shop??

 

I will be doing the work myself.
If I understand this correctly it is one stand pipe and one D-plug?

 

Per side and the Stc is back by the oil pump. I would air test it to verify where my leak is but most likely one of the three.