2001 7.3 hpop problems
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Cross-Country
Joined: Jul 2012
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2001 7.3 hpop problems
I have a 7.3 that I had to change the turbo while I had it down I replaces the orings and cups on the injectors The truck has over 300k's on it and these have never been changed. I also did the new turbo base and put new injector harness on. Also replaced the icp and irp.
The injectors were not any good and they blew out in less that 50 miles. I replaced the orings then the irp came apart and I had to replace it. The parts I got were crappy they were from ebay but said ford on them.
Now I can start it (it takes a really long time to start) and kill it and it will not restart. I have started it and let it run with the ae hooked up and shows everything good. But it will not start after that first time the next morning it will start but again it takes a lot of cranking to start.
Some times the jpop will read it the 700 and better and sometimes it only has a 200 or so pressure.
My question what will cause this besides the hpop going out?
Thanks
Altonh
The injectors were not any good and they blew out in less that 50 miles. I replaced the orings then the irp came apart and I had to replace it. The parts I got were crappy they were from ebay but said ford on them.
Now I can start it (it takes a really long time to start) and kill it and it will not restart. I have started it and let it run with the ae hooked up and shows everything good. But it will not start after that first time the next morning it will start but again it takes a lot of cranking to start.
Some times the jpop will read it the 700 and better and sometimes it only has a 200 or so pressure.
My question what will cause this besides the hpop going out?
Thanks
Altonh
Tuned
Joined: Apr 2004
Posts: 426
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From: Aroostook County, Maine
Check the oil level in the HPOP reservoir. If it is below a certain level, the starter can crank all day and it will never start. If the level drops - meaning it isnt "refilling" at the rate the hpop consumes it, at some point you will have probs. The likely culprit here is the LPOP. if at 300k this has never been addressed, it may be time. I had gradually increasing intermittent starting probs on my e99. Once I realized the low oil level in the rez, I could fill it up and get going as needed (note that you are adding oil to the system so be careful on overall oil level). I changed the LPOP and havent had the prob since. That was at 185k.
Lead Driver
Joined: Oct 2005
Posts: 6,129
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From: Ponca City, OK
It sounds like the IPR valve is only working intermittently or you possibly have a wiring issue to the IPR. IPR wiring issues are common, even if the harness is intact and looks perfectly fine. After years or service all the heat cycles and petroleum soaked environment takes a toll on the insulation. Unwrap the harness from the connector back 8-10 inches looking for any signs of damage. If any is found you can repair or purchase a replacement connector pigtail from Riff Raff or reputable supplier. There are loads of cheap knockoffs and counterfeit parts out there. The failure rate on these tend to be high. That's why most of us tend to steer clear of places like Amazon and eBay for engine management parts.
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Cross-Country
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It is a new wiring harness and the ipr has been changed twice.
I also replaced the low oil pump.
The truck was running fine while going down the road when the low oil pressure dropped then the truck died. Changed the low pump and now I can't get the right high pressure. It has always had more high pressure according to the ae then it is supposed to have but I thought that was a good thing.
The reuck has over 300,000 miles and this is the first time these things have been changed.
Thanks
Alton
I also replaced the low oil pump.
The truck was running fine while going down the road when the low oil pressure dropped then the truck died. Changed the low pump and now I can't get the right high pressure. It has always had more high pressure according to the ae then it is supposed to have but I thought that was a good thing.
The reuck has over 300,000 miles and this is the first time these things have been changed.
Thanks
Alton
Lead Driver
Joined: Oct 2005
Posts: 6,129
Likes: 1,919
From: Ponca City, OK
Okay sounds like you got a low pressure oil problem, not a high pressure problem. Have you verified that the low pressure pump is actually moving oil? From your description is sounds like it does but you're likely loosing most of your volume to either a broken spring on the low pressure regulator or you have an internal leak, probably front cover to block. The regulator is part of the rear oil cooler assembly, you can get a look at it by removing the filter. There will be two ports about the size of a dime, one is the filter bypass and the other is the low pressure regulator. It dumps everything back to the pan at whatever pressure it takes to overcome the spring. The reason you can start cold is the oil is thicker plus w/ the higher rpm's while running it can out run the leak, but w/ hot oil the starter just can't spin it fast enough.
Edit: Fixed some spelling gibberish and grammatical errors. I reread this and would swear I was either drunk or riding the short bus home when I wrote it. Hopefully it makes some kind of since now.
Edit: Fixed some spelling gibberish and grammatical errors. I reread this and would swear I was either drunk or riding the short bus home when I wrote it. Hopefully it makes some kind of since now.
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7.3
Changed the irp again and now have high pressure oil but now my gauge shows no low oil. Will change the sending sensor hoping that is it,
I understand the truck will not run with no low oil pressure? Am I right? Or at least run till the high pressure reservoir is empty.
I understand the truck will not run with no low oil pressure? Am I right? Or at least run till the high pressure reservoir is empty.
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Lead Driver
Joined: Oct 2005
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From: Ponca City, OK
Changed the irp again and now have high pressure oil but now my gauge shows no low oil. Will change the sending sensor hoping that is it,
I understand the truck will not run with no low oil pressure? Am I right? Or at least run till the high pressure reservoir is empty.
I understand the truck will not run with no low oil pressure? Am I right? Or at least run till the high pressure reservoir is empty.
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