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Help! 7.3 No Start

  #16  
Old 09-22-2018, 01:31 PM
Nelson98
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I'm in Corvallis Oregon. And as far as sensor brand I agree motorcraft is better, but don't you think the icp would get better unplugging it if it was bad? It didn't help...
 
  #17  
Old 09-22-2018, 01:33 PM
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I'm getting smoke but that's normal for the tune it's on, I'm straight piped and running a mildly aggressive tune and what I saw was nothing out of the ordinary
 
  #18  
Old 09-24-2018, 10:18 PM
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Pretty much the same here. I've changed the HPOP, ICP, IRP, CPS, batts at 13.5, oil in HPOP good, engine oil level good, coolant level good, fuel at 3/4 tank, I can here fuel pump working, cranks good and fast. Just died Friday while running at 1200 rpms with PTO, then wouldn't start. I noticed it running a little louder (more chatter), got in and it had yellow engine lamp and "check gages" lamp on. I pushed clutch pedal to disengage PTO and it died. Hasn't started since. Ive tried starting while isolating various sensors, still no start.

This is a pic of the latest info I pulled with Torque PRO...
 
  #19  
Old 09-24-2018, 11:44 PM
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Originally Posted by Nelson98 View Post
I'm in Corvallis Oregon. And as far as sensor brand I agree motorcraft is better, but don't you think the icp would get better unplugging it if it was bad? It didn't help...
The way in which you are describing your ICP pressure climb to me indicates either a weak pump, failing IPR or a high pressure leak. The IPR being at over 90% as you said backs this up as it should NEVER go over 65% duty cycle. I would recommend switching back to a Motorcraft IPR valve and then recheck your numbers.

Originally Posted by marauder1234 View Post
Pretty much the same here. I've changed the HPOP, ICP, IRP, CPS, batts at 13.5, oil in HPOP good, engine oil level good, coolant level good, fuel at 3/4 tank, I can here fuel pump working, cranks good and fast. Just died Friday while running at 1200 rpms with PTO, then wouldn't start. I noticed it running a little louder (more chatter), got in and it had yellow engine lamp and "check gages" lamp on. I pushed clutch pedal to disengage PTO and it died. Hasn't started since. Ive tried starting while isolating various sensors, still no start..
What are your ICP pressure and IPR duty cycle readings while cranking? When you climbed in and saw the check gauges warning did you see any abnormal readings from the gauges?
 
  #20  
Old 09-24-2018, 11:51 PM
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honestly i don't know what my gauges were doing. normally i'm **** about watching my gauges daily. just because this is my first diesel and i'm constantly nervous about it (lack of knowledge). I didn't expect it to die when i pressed the clutch pedal, so I don't know what they were doing. but, normally all the gauges were perfect day to day. I've only had this truck for a little over a month and nary a problem. this latest pic is data as i'm cranking. i'm extremely puzzled as to why my HPOP is so low. just installed it today.
 
  #21  
Old 09-25-2018, 12:54 AM
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I think you uploaded the same image as the first.
 
  #22  
Old 09-25-2018, 03:00 AM
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Yea your right. Itís the most current one. Not sure why I uploaded it twice. I was thinking they were different I guess. Sorry bout that.
 
  #23  
Old 09-25-2018, 10:31 AM
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Originally Posted by marauder1234 View Post
i'm extremely puzzled as to why my HPOP is so low. just installed it today.
How long have you been cranking it for? Replacing the HPOP voids a noticeable amount of oil in the high pressure oil system. It takes a bit of cranking to get it to fire.

After that it takes about 100 miles to work the air out of the system. Depending on how you drive, it could take a little more or little less miles before things smooth out.
 


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