7.3 unreliable recently

Baker42 · Nov 28, 2011

I have a 95 7.3 with minor mods. My problem is truck will start run fine and then diewhen operating temp is reached. My HPOP gauge reads 550 at idle I will rev to 1700 rpm and gauge reads 2000 psi no load just rpms. Once hot gauge falls to 1000psi then 500 then 350 and she just quits. Will not start until cold. I pulled injectors and replaced o rings.In 2009 HPOP was replaced with Adrenaline unit from Dieselsite along with new IPR from Ford. Two days ago pulled IPR and replaced o rings. Also when the truck dies I have unplugged ICP still a no start. suggestions would be appreciated:biggun:

Fly By Night · Nov 28, 2011

how old is your oil?

Baker42 · Nov 28, 2011

Oil has 2000 miles on amsoil with amsoil filter

Baker42 · Nov 28, 2011

Well it figures nobody would know anything I dont already. I hope it is not the *%^$#@ pickup tube

DEEZUZ · Nov 28, 2011

whats your low pressure reading while this is occuring? I am thinking since you are a 95 year, the deairetion valve maybe loose

Baker42 · Nov 28, 2011

I only have stock low oil pressure gauge but with pcm fuse out it registers middle of normal while cranking also what is deairetion valve never heard of it. Thanks for reply

Baker42 · Nov 28, 2011

also have seen air bubbles in HPOP reservoir

DEEZUZ · Nov 28, 2011

its a valve they put in the front cover of early 7.3's to help with airetion... search it up on psn....

DEEZUZ · Nov 28, 2011

your not running the AMSOIL 5W40 are you??? If so, change it... I ran it, its junk

Baker42 · Nov 28, 2011

No 15-40 heavy duty

Baker42 · Nov 29, 2011

I also have heard of oil pickup cracking. Anyone else heard of this??

Wackerjr · Nov 29, 2011

Cracked pickup has nothing to do with hot oil... it will do it all the time.... you have a pm....

Baker42 · Nov 29, 2011

A cracked pickup will affect HPO if it is a hairline crack. Oil gets hot and thins out. Air gets introduced into HPOP. Air doesnt create hydraulic pressure. And what do you mean by pm....?

woodduck97 · Nov 29, 2011

If you think it is the pick up tube take the motor out and look at it.

Baker42 · Nov 29, 2011

I dont Know. But what I do Know is all the aftermarket crap I put on my truck all the venders do is point fingers at someone else. It could never be their product:wtf:

onebad7.3 · Nov 29, 2011

Baker42 said:
I dont Know. But what I do Know is all the aftermarket crap I put on my truck all the venders do is point fingers at someone else. It could never be their product:wtf:

First lets figure out whats wrong with your truck before the finger pointing begins. All the aftermarket products you put on the truck is up to you, its not the vendors fault if something happens to the truck, its called "use at your own risk"

Baker42 · Nov 29, 2011

Its also called stand behind your )(*&^% product. But then again it is 2011 and I dont think people have the same values anymore. 95 7.3 238/100 regulated return d66 superduty lift pump 8micron and 2micron filters Adrenaline F-5.Also truck currently has stage 1s 238/100 on the way. And your right about finding the problem first but something tells me its the pump or the pickup (most likely pump)Well keep you posted

SDS97_7.3 · Nov 29, 2011

But if you have a cracked pickup tube like your thinking you may that has nothing to do with the parts you put on.

Baker42 · Nov 29, 2011

True but the pump does and all Bob will tell me is I dont know and good luck .Injectors 2 years old new o rings on injectors and IPR. IPR replaced with pump also 2 years ago. What do you think? Pickup tube is a looong shot. Going out right now. Fords test is to jack the rear end up 10 to 12 inches start truck. This completely submerges pickup in oil will post back later.

woodduck97 · Nov 29, 2011

You need to get a manual low presure gauge and test it if it still does it jacked up as ford says and test that. If it keeps presure and you are loosing HPO I think there is a problem with the pump...