Need your help guys - hot start problem
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Senior User
Joined: Sep 2002
Posts: 297
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From: Butner,NC
Need your help guys - hot start problem
I have a 95 F-250 powerstroke w/auto and 198,000 miles; this 7.3 still runs as new but I've been having some starting trouble. In the morning it cranks right up and off to work I go (20 miles). I leave work at 4pm and head home but I may stop at the store (18 miles) and grab a 12pk. Two weeks ago I did that and it was real hard to crank but it fired; the starter turns the engine as always but it took longer than usual to fire. I drove it this past weekend and after 40 miles I stopped; but when I started to leave it didn't fire. I let it cool for about an hour and it fired right up and home I went. Today was work as always and at 4 was home but the 12pk was needed so I stopped. I want going to shut it off while I went in but I did and you guessed it: the engine turned over fine but it would not fire. I waited 15 minutes and tried again but nothing. I called a friend and with one small squirt of starter fluid in the intake opening it fired right away. As anyone got an idea where I should begin to fix this problem. Help. 
Fleet Mechanic
Joined: Oct 2003
Posts: 1,764
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From: CentralEastern Utah
Sounds like you've blown your IPR orings. Pretty simple fix. Ya just got to get the oring kit.
Here a link on how to.
http://cw-diesel.com/LuxSite/IPRInfo.htm
Here a link on how to.
http://cw-diesel.com/LuxSite/IPRInfo.htm
Last edited by ltfox; Aug 11, 2005 at 04:43 PM.
Thread Starter
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Senior User
Joined: Sep 2002
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From: Butner,NC
I tried something today when I got home. Shut it down,waited 30 seconds and turned the key-it fired and ran. I shut it back down and waited 2 minutes-it fired but not real quick. I shut it down again and waited 5 minutes,turned the key,starter spun the motor as usual but the 7.3 would not fire. After an hour and a half I tried it again- it fired but not real quick. I don't want to start replacing parts (I can but my wife would whoop my a--!) so I have to understand this problem. Thanks for replying guys.
Posting Guru
Joined: Nov 2000
Posts: 1,005
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From: Cincinnati, Ohio
When my 95 F250 did this on the way from Cincinnati, OH to Charlotte, NC several years ago it was the IPR O Rings. I have a thread that I started copied out and saved as well as a set of very good instructions on how to do the job - they are MS Word documents. When I did mine I used basic hand tools and took care of it in an hour or so. The hardest thing to me was getting the blue hose back on the bottom of the fuel filter housing. If you will click on my user name and send me an eMail (NOT a private message - the software here does not allow eMail addresses to show up in either threads or PMs to prevent spam) with IRP O-RING INFORMATION in the subject line and let me know what eMail address you would like me to use I will reply with the attachments that have what you need.
Let me know.
Dave / Believer45
Let me know.
Dave / Believer45
Freshman User
Joined: Jun 2005
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If you want to try something. When it does not start, try pouring some water on the IPR. This cools the ipr and if it starts replace the IPR. The outher thing you can do is when it does not start, crank it for 30 sec. If it is an electroinc problem it should throw a code.
Good Luck
Good Luck
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Senior User
Joined: Sep 2002
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From: Butner,NC
I replaced my IPR o-rings (they were bad) , got everything back together and now the truck want run. It turns over great but it want fire. Any ideas on correction. Before I started this repair the truck would crank when cold but not hot.
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Thread Starter
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Senior User
Joined: Sep 2002
Posts: 297
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From: Butner,NC
I completely started over ; unhooking fuel lines and moving fuel bowl to the side.I unscrewed the IPR valve and dissasembled it - cleaning it good with wd40 and airhose.Got it all back together,double checking all connections, refilled the HPOP reservoir. It fired right up, ran rough for about 5 minutes then smoothed out. It's fixed. Thanks guys.
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