1994.5 - 1997 7.3L Power Stroke Diesel  

Rebuilt engine, cant get it started. 1995 7.3

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  #46  
Old 05-04-2017, 12:20 PM
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Originally Posted by z31freakify
On the pickup tube did you replace the rectangular seal? Fill your oil rails and HPOP with oil and try to start it.
yeah I put a new seal on pickup tube. Oil rails are full, so was hpop. Did you say there shouldn't be any oil in the Hpop gear? Behind the EBPS?
 
  #47  
Old 05-04-2017, 12:23 PM
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The gears should be oiled if your getting LOP, but no oil like your hpop reservoir
 
  #48  
Old 05-04-2017, 12:36 PM
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Originally Posted by z31freakify
The gears should be oiled if your getting LOP, but no oil like your hpop reservoir
it does seem like there is some oil on the gear, not much.
 
  #49  
Old 05-04-2017, 01:04 PM
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That's normal, have you tested the HPO rails with a manual gauge to see if your building pressure.
 
  #50  
Old 05-04-2017, 01:11 PM
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Originally Posted by z31freakify
That's normal, have you tested the HPO rails with a manual gauge to see if your building pressure.
i will test that when I get it back together.

Another question: I just removed the Hpop gear, it was torqued to spec when installed. Is there a possible chance it was just spinning the gear and not the pump??

Is there a sure way to install this gear? There is no key to hold the gear in place....... lame

 
  #51  
Old 05-04-2017, 01:47 PM
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If it was torqued right, it should not spin.
 
  #52  
Old 05-04-2017, 02:01 PM
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if that was a new gear, looks like it has slipped some


What did you tighten it up to?
 
  #53  
Old 05-04-2017, 02:54 PM
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Originally Posted by knottyrope
if that was a new gear, looks like it has slipped some


What did you tighten it up to?
yeah it does look like it slipped.... I cleaned everything and I re torqued to 100 lbft

It's odd I'm getting a p1298 code when buzz testing..

https://youtu.be/f_74mWDJgYg
 
  #54  
Old 05-04-2017, 03:00 PM
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if IDM is bad enough for the PCM, that might be why it don't start


got a spare one?
 
  #55  
Old 05-04-2017, 03:09 PM
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Originally Posted by knottyrope
if IDM is bad enough for the PCM, that might be why it don't start


got a spare one?
well, I sent my pcm and idm into swamp diesel. They suggested a new idm. Pcm tested out good. Buzz test passed the second time. Wierd.

Seems I'm not getting much pressure in my Hpop. Going to go get a manual gauge..

https://youtu.be/6zyg0gp_mkY
 
  #56  
Old 05-04-2017, 04:02 PM
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inside HPOP reservoir is only LPOP pressure, once it leaves the pump depending on IPR voltage you get HPOP pressure


Check IPR voltage at the connector while cranking
 
  #57  
Old 05-04-2017, 04:16 PM
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Originally Posted by knottyrope
inside HPOP reservoir is only LPOP pressure, once it leaves the pump depending on IPR voltage you get HPOP pressure


Check IPR voltage at the connector while cranking
https://youtu.be/f_74mWDJgYg

Video shows voltage, top right. I'm getting 24+ while cranking now
 
  #58  
Old 05-04-2017, 04:40 PM
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Latest video, not really sure where to go from here
 
  #59  
Old 05-05-2017, 08:57 AM
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when you remove IPC, the laptop reads default values from PCM


Time for a pressure gauge 0-4000 PSI to be connected.


Do you have a meter? checking the voltage of IPR is still needed. the screen voltage cant be trusted fully.
 
  #60  
Old 05-05-2017, 09:31 AM
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Originally Posted by knottyrope
when you remove IPC, the laptop reads default values from PCM


Time for a pressure gauge 0-4000 PSI to be connected.


Do you have a meter? checking the voltage of IPR is still needed. the screen voltage cant be trusted fully.
trying to find a tutorial on checking the ipr voltage. Is this test with key on? Or turning over? From battery ground to red wire on ipr while connected? Yes I have a multimeter
 


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