7.3 oil issues

[12v250]

I have an obs,I bought it from a friend of mine. I know the history of this truck pretty well but lately I've had nothing but bad luck with that. I bought it 2 weeks later the high pressure oil pump went out I replaced the IPR,ICP while doing the high pressure oil pump. Three days after that the turbo decided to **** the bed. I replace the turbo, in a week later the turbo is shot again. I was driving home last night in the truck just died in the middle of the road, would crank for days but would not start I got it home, and it still would not start. Unplug the ICP sensor and it still will not fire. So I waited till this morning, and it fired right up instantly. After hooking it up to my scanner in reading ICP, it seems normal. It is between 580 and 650 at idle@ operating temperature.I put a mechanical gauge on the high pressure oil pump reservoir, to see what my low pressure oil was at.cold startup was at 55 psi, operating temperature is between 20 and 24 psi. All of these numbers seem normal. I am leaning towards a low pressure oil pump issue due to the fact that I have gone through two turbos now and a high pressure oil pump already. I'm kind of hesitant to just start throwing parts at the truck, due to the fact of being laid off for the winter.it just seems extremely strange to me that it will just die out of nowhere and not fire, it was cold oil it will fire right up. I let it sit in my driveway for 2 hours idling just monitoring the gauges that I have hooked up currently and it will not die I cannot get it to reenact the issues that I've been having.
I'm open to ideas and suggestions.

 

[Arisley]

Does it have any DTC codes?

 

[POWER-STRUCK]

generally don't see many turbo failures on OBS trucks with stock injectors unless the truck is shut off while the turbo is spooled up. the LPOP could be the culprit but if the low pressure is low enough that it has lack of lubrication then the HPOP would starve for oil.

 

[12v250]

The truck has no codes. The truck is an OBS, but the engine is a 2000 with super duty charger stage1 hypermax injectors. Truck is a daily and a plow truck, driven in #1 on dp tuner 99% of time. I'm sorry I know that's kind of important information that I failed to mention. That is why I'm at the point where I am right now, leaning towards the low pressure oil pump, but it doesn't make sense that I'm making adequate pressure at the high pressure oil pump reservoir. It's hit or miss and it's a pain to diagnose. I can't drive it cause the charger looks like Elvis, dancing all over! I've gone through 2 chargers and 1 hpop, both of these are obviously fed by the lpop. A weak lpop would eplain dying mid drive and not starting till oil thickens up.

 

[12v250]

First post on psa. Was on psn forever, left before **** hit the fan and after I did the swap in my 06. Now I'm back cause I gots me a good ol IBS

 

[TyCorr]

Irritable bowel syndrome?

 

[Arisley]

Welcome to PSA.

When the truck does not start, can your scanner connect to the PCM?

 

[Arisley]

If not, check your PCM relay. They die intermittent sometimes.

I know that still doesn't address the two murdered turbos though.

 

[12v250]

OBS, no issues with my ass. Just the truck! Lol. Thanks for the warm welcomes

 

[12v250]

Yeah when it wouldn't start it was saying 11psi at the icp, that was last night. This morning its reading normal

 

[Arisley]

You might have a sticky IPR.

 

[jimdawg185]

I didn't loose any parts, but my truck had the same no start symptoms and it was the IPR...

 

[12v250]

How would a sticky ipr cause truck to shutdown then no start. I'm just brainstorming and I can't put it together. I can't understand how sporadically this happens. No warning sign, just done. Let cool down starts Fine. Last week it died 3 time on the road, but started each time no issues.
I hooked up another oil psi Guage at the port on the driversside very back of the engine, Almost to the trans. It looks like a 1/8 pipe plug. Both read same thing but after shutdown, one on hpop reservoir falls alot faster than the one down by the oil filter. Idk if this is normal or not

 

[OBS-Addiction97]

How would a sticky ipr cause truck to shutdown then no start. I'm just brainstorming and I can't put it together. I can't understand how sporadically this happens. No warning sign, just done. Let cool down starts Fine. Last week it died 3 time on the road, but started each time no issues.
I hooked up another oil psi Guage at the port on the driversside very back of the engine, Almost to the trans. It looks like a 1/8 pipe plug. Both read same thing but after shutdown, one on hpop reservoir falls alot faster than the one down by the oil filter. Idk if this is normal or not

The ipr could be "sticking" open causing the res to drain.

It also could be injector O rings.

 

[mandkole]

Welcome--

Good HPO troubleshooting stuff here.

http://powerstrokearmy.com/forums/showthread.php?t=1818

Also, that IPR power supply harness should be looked at. These random lapses of pressure could be the power supply (especially since there are no codes).

20-24psi of hot oil pressure at idle is normal. That much at operating speed is not. The LPOP delivers oil or it doesn't and your issue is random, so Id likely not go there.

 

[12v250]

I might be missing something but the only thing that will destroy a turbo like that is lack of oil. And that would explain why it dies and doesn't start again. I'm not arguing by any means I'm just thinking out loud
I just started the truck, 7 degrees in illinois, not plugged in. It started made 80 psi@ hpop reservoir, it took 2 mins to read 20 at the filter plug... kind of odd if they are supplied through the same pump. Oil cooler, filter, relief valve issue? I'm lost guys

 

[12v250]

Turbo is completly locked up now. Obviously there is a supply issue, weather it's feed passage plugged or whatnot, I'm about done with this truck.

 

[mandkole]

In looking at oil system diagrams, the oil leaves the pump and goes two directions-- feed the HP reservoir and to the cooler/filter assy. Is the filter/cooler path plugged and forcing most of volume to the reservoir? Hopefully the crank and piston coolers are getting oil as well...

 

[pullandpray]

Could it be the ebpv sticking shut?

 

[mandkole]

Could it be the ebpv sticking shut?

Does the oil deadhead if its closed? When I gutted mine I recall the various oil paths that were welded but dont know exactly how it works.

My concern was the big diff in pressure when measured at the res or the service port by the filter. There's a flow blockage somewhere.