I'm at wits end. I need my truck for work and it's being stubborn.

Here's what happened:
I went to get supplies for a job. I left the truck running while I went in. It was running for about 30 minutes with the air conditioner on. When I got back in the truck the air conditioner was blowing hot air. The engine temp was normal. Other than the air conditioner blowing hot, the truck was running perfect, until I went to pull out of the parking lot. When I did the engine died, just as if I turned off the key. It will crank but will not start. No smoke from exhaust.

The truck:
It's a 95 F250. 305+k.
I've put at least 2000 miles on it.
I've owned it just shy of a year.
It was sitting in a lean to since 2003.
All fluids were changed recently.
All filters were replaced recently.
Hard to start and blows white smoke when cold.
No other issues with the engine.
Mechanical fuel pump.

What I've done so far: (in no certain order)
Engine oil was 2 quarts low, added to full.
Was low on fuel so I added 10 gallons.
Drained fuel bowl and refilled by cranking.
Replaced CPS with one from the dealer.
Replaced IPR.
Replaced valve cover gaskets.
Tried to start with IPS disconnected.
Tried to start with EBPS disconnected.
Checked all fuses.
Replaced pigtail for the IPR.
Replaced all filters recently.

​​​​​​Other information:
HPOP reservoir has about 30 ounces of oil in it.
Glow plug relay working properly.
​​​​Getting approximately 12v at the IPR.
No smoke from exhaust while cranking.
WTS light working normal.
No MIL. (other than when I had the ICS disconnected)
No codes, stored or pending.
Batteries are fully charged.
Oil pressure reads about mid way after a few seconds of cranking.
RPMs are about 200 on tach while cranking.
I'm in Wichita KS and it's hot and humid here.


I think that covers all I've done and know so far. I don't know what to try next. I need my truck desperately. Please can someone help me with this thing.

​​​​​Could I have gotten defective IPR? Is there a way to test it? Or, what else could it be, and how can I test whatever it may be? I am appreciative of any helpful advice you guys could give. Thank you in advance.
​​​​​​

 

Do you have AE or any way to monitor ICP etc while cranking?

 

I have a ELM327 OBDII adapter and torque Pro. However, it doesn't show the sensor In my list of options.

 

I'm picking up a fuel pressure tester now. I'll post the pressure as soon as I get it.

 

https://drive.google.com/file/d/0Byb...1qRU1VVGc/view

Here you go! Follow that and report back what you find.

 

The fuel pressure was peaking at 45 psi.

 

First I have to say thank you Jarrett. That is a great flow chart. <br /><br />As for my conclusions, I don't like where this is going. The fuel pressure was good according to the chart. So, that leaves me with oil pressure. I don't have a gauge that goes high enough. And there's no place I know of that has one. Is there a way of knowing if I'm getting pressure, and if so how much?<br /><br />Either way it looks like a bad HPOP or a bad IPR. However I just replaced the IPR and harness. Is it possible the new one is defective? If so, is there a way to test the IPR?<br /><br />That leaves a bad HPOP. That just seams like a long shot. The truck has been running great until it decided to turn off suddenly. Do HPOPs go out all the sudden or, do they have symptoms before failing? Also, is there any way to test the HPOP or bypass the IPR?

 

To me it sounds like a bad pcm or idm not a bad hpop but honestly it's hard to say I've never heard of a hpop just up and quitting but maybe I'm wrong I thought it was usually a slow failure

 

Yeah, usually a slow failure. If the hpop res is holding oil then the way to test is with either a gauge connected to a plug in the high pressure oil rail or with a scanner. You can't bypass a IPR. Even if you unplug the IPR it will not run. You do have tach movement and a wait to start light don't you?

 

The HPOP has been known to fail without significant warning however. BBSlider had it happen to him last year.

Do you have any way of monitoring running parameters?

 

Well now you have LOL...But yeah, they can just quit.

OP, GET AN OIL PRESSURE TEST GAUGE KIT FROM HARBOR FREIGHT. THEY'RE ABOUT 25 BUCKS AND IT'S VERY EASY TO DO. THERE WAS A PORT PLUG IN THE OIL FILTER HOUSING THAT YOU SCREW INTO AND THEN CRANK AWAY AND SEE WHAT YOUR OIL PRESSURE IS.

 

Good grief, not sure why that's all caps. I promise I'm not yelling at you. LOL

 

Or just set up the right PID for Torque Pro to read ICP. Over on "the Nation", in the OBS PSD tech main section, there's a sticky thread about a mile long, TMI about Torque Pro for the OBS.

 

^^^ that would be my next step. My IDM died all of a sudden one time. The HPOP can fail suddenly but it is not common

 

I did mean to say that the HPOP failure is not common. That is the reason it took me two days to diagnose because my OBS at the time only had 165k miles and we kept thinking there is now way it could be a bad HPOP....but we were wrong.

Check low oil pressure to make sure you have that and get some sort of data monitor to see what your HPOP pressure is when cranking. Both of those will answer A LOT of questions. Hopefully you don't do like me and forget to check the oil and find out its really low....yep, that was my dumbazz move of the year. My injector o-rings were non-existent, so I was losing 8 quarts of oil in about 50 miles....it was crazy....anyways, let us know how it goes.