1994.5 - 1997 7.3L Power Stroke Diesel  

powerstroke wont start if warm!

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  #16  
Old 11-29-2014, 11:21 PM
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ok ill do that and check back in with yall and see if that corrected the issue
 
  #17  
Old 12-07-2014, 06:46 PM
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Originally Posted by ReBilld
One or two bad injector o-rings would not keep it from starting. If the IPR o-rings are bad, it won't let it build enough pressure to tell the PCM to fire the injectors. A couple bad injector o-rings would just make it run rough, and most of the time it will put oil back in to the fuel bowl.
.Low Hp oil pressure will most times keep the HP oil pressure low enough to keep the IDM from firing .Could very well be injector O rings There is a test for this.

IPR O rings are the easiest , most common test .Warm oil starting problems can be as bad as an injector poppet issue.
Either a worn poppet or simply a loose poppet screw .
 
  #18  
Old 12-08-2014, 05:23 PM
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My 96 was the same way did oil change and changed top end oil and now she runs like a champ the oil seems to get air porositys as it gets broken down there for being a horrible hydraulic fluid and not being able to correctly operate the injectors
 
  #19  
Old 12-08-2014, 06:28 PM
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Originally Posted by Action4478
.Low Hp oil pressure will most times keep the HP oil pressure low enough to keep the IDM from firing .Could very well be injector O rings There is a test for this.

IPR O rings are the easiest , most common test .Warm oil starting problems can be as bad as an injector poppet issue.
Either a worn poppet or simply a loose poppet screw .
Hey Rick! Where you been hiding? I didn't think one or two bad injector o-rings would loose that much pressure to cause a no start issue. Learn something every day!
 
  #20  
Old 12-21-2014, 05:21 PM
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ok I rebuilt the ipr ( the O-rings were no longer fat and sealable ) made sure that the piston in it wasn't sticking & etc. popped it back in and I also cleaned the fuel bowl and the fuel regulators fine screen and they where both very ,very ,very nasty and clogged with trash . I put everything back together and ran it till it got to the operating temperature and it still didn't want to start, so with the ipr and fuel bowl eliminated and unplugged the pcm on the corner of the motor and that cured the problem !!!! it started at operating temperature ,so ill get one of those and go on from there
 
  #21  
Old 12-22-2014, 02:33 AM
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What did you unplug?
 
  #22  
Old 12-22-2014, 06:59 AM
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Originally Posted by stainlessstroker95
What did you unplug?
It sounds to me that he unplugged the ICP sensor. I could be wrong tho
 
  #23  
Old 12-22-2014, 10:37 AM
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sorry I meant icp lol that's what I unplugged ahahh
 
  #24  
Old 03-26-2015, 12:10 PM
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its started doing it again ....I replaced the icp and rebuilt the ipr and still no start when hot , I really scratching my head on this cause I don't know what the problem could be now
 
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