Suspect Ford HPOP
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Suspect Ford HPOP
Hey guys, this is my first post on this forum just had a question. I’ve got a 94 F250 7.3 psd. It’s got 250k on the clock. I’ve been having stalling issues with it for the past few months. It has good fuel psi (shop fitted a fass system few months ago). It had bad head gaskets with coolant entering the oil but a shop fixed all that with new head gaskets a couple months ago. Oil has been changed a few times so there is no more coolant in the oil. But after all this still having no start when warm. I suspected an IPR valve so I replaced that and the ICP. When cold the truck has great oil pressure and fires right up. But when eot reaches 190 degrees no start unless I unplug the ICP then it’s a longggg hard start. All the injector o rings were also replaced. So last thing is the hpop right? I did a dead head test with the IPR full fielded and got an immediate 3800 psi when cranking cold. Then let the truck warm up to eot 190. Repeated the test with IPR full fielded and only got 200. So wouldn’t that indicate a bad hpop?
sorry for the long post just trying to relay all the info at once any help would be tremendously helpful to me.
thanks,
Brody
sorry for the long post just trying to relay all the info at once any help would be tremendously helpful to me.
thanks,
Brody
Lead Driver
Joined: May 2009
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From: Tobyhanma, PA
Have you checked the hpop reservoir once it's up to temp and having starting issues. Could be a lpop issue where it's nit feeding enough oil. Just a suggestion to check. Hpops are rather expensive, just want to make sure all other options have been considered
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Thank you for the reply! Yea I have checked hpop reservoir when it’s having the no start. The reservoir is all the way full to the plug. And while it’s running the dash oil pressure gauge looks really good. I’m just a little confused as to how I could have 3600+ psi when cold but only 200ish when warm? Could that be normal for a failing hpop? Thanks!
Brody
Brody
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Joined: Sep 2002
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From: North Texas
They have been known to just die. @BBslider001 had one just ****-the-bed once, maybe he can give you comments.
My full load pressure would fall off on the top end bad and the IPR skyrocket, that is how I knew mine was toast.
My full load pressure would fall off on the top end bad and the IPR skyrocket, that is how I knew mine was toast.
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They have been known to just die. @BBslider001 had one just ****-the-bed once, maybe he can give you comments.
My full load pressure would fall off on the top end bad and the IPR skyrocket, that is how I knew mine was toast.
My full load pressure would fall off on the top end bad and the IPR skyrocket, that is how I knew mine was toast.
Brody
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Joined: Mar 2012
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From: Texas
Not sure it will help, but my HPOP died on the side of the interstate due to very poor maintenance from the PO (using wrong oil, bad intake integrity, etc)....when it did die, it took out injector o-rings and caused all sorts of problems....as in when I removed the injectors after FINALLY figuring out the problem, they weren't even there anymore. But, I was also using oil to the tune of 2 gallons in 30 miles. I am not sure what the cold start vs. warm start means. That is a new one on me. Sounds for sure like an HPOP getting worn. O-rings could definitely cause these issues when warm if they are so worn that they can't hold pressure like they shpuld. I wonder if @cleatus12r would have some input on this. My experience has been that when they quit, they just quit. But I also know Eric had a slowly dying issue different than mine that he addressed with a new pump.
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Not sure it will help, but my HPOP died on the side of the interstate due to very poor maintenance from the PO (using wrong oil, bad intake integrity, etc)....when it did die, it took out injector o-rings and caused all sorts of problems....as in when I removed the injectors after FINALLY figuring out the problem, they weren't even there anymore. But, I was also using oil to the tune of 2 gallons in 30 miles. I am not sure what the cold start vs. warm start means. That is a new one on me. Sounds for sure like an HPOP getting worn. O-rings could definitely cause these issues when warm if they are so worn that they can't hold pressure like they shpuld. I wonder if @cleatus12r would have some input on this. My experience has been that when they quit, they just quit. But I also know Eric had a slowly dying issue different than mine that he addressed with a new pump.
Thanks for all the input guys really appreciate it!
Brody,
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