Notices
1994.5 - 1997 7.3L Power Stroke Diesel  

won't start when hot

Thread Tools
 
Search this Thread
 
Old Dec 25, 2009 | 10:03 AM
  #1  
vernon_25's Avatar
vernon_25
Thread Starter
|
New User
Joined: Dec 2007
Posts: 19
Likes: 0
Question won't start when hot

i bought a 95 off of a friend of mine that will not start back up when it is hot, it has started every morning this week here in ohio without being plugged in, will run all day without a problem, as long as you don't shut it off of course, but if you shut it off it will not fire back up for 2 to 4 hrs, if you start it in the morning let it run 5 minutes then shut it off, it will restart, but once it gets warmed up at all and you shut it off it will not fire back up for a couple hours, any help would be great, thanks
 
Reply
Old Dec 25, 2009 | 10:12 AM
  #2  
Iallwork's Avatar
Iallwork
Elder User
Joined: Sep 2009
Posts: 860
Likes: 0
From: Grantsburg,WI
Hey vernon25. Merry Christmas. Welcome to FTE, Somebody will come on soon. These guys really know there stuff.
 
Reply
Old Dec 25, 2009 | 10:20 AM
  #3  
vernon_25's Avatar
vernon_25
Thread Starter
|
New User
Joined: Dec 2007
Posts: 19
Likes: 0
Merry Christmas

Merry Christmas to you also, i hope someone can lead me in the right direction to fix the problem, thanks
 
Reply
Old Dec 25, 2009 | 10:34 AM
  #4  
DRRXR's Avatar
DRRXR
Post Fiend
Joined: Feb 2009
Posts: 8,773
Likes: 1
From: Texas Coast
Q's

Originally Posted by vernon_25
i bought a 95 off of a friend of mine that will not start back up when it is hot, it has started every morning this week here in ohio without being plugged in, will run all day without a problem, as long as you don't shut it off of course, but if you shut it off it will not fire back up for 2 to 4 hrs, if you start it in the morning let it run 5 minutes then shut it off, it will restart, but once it gets warmed up at all and you shut it off it will not fire back up for a couple hours, any help would be great, thanks
~~~~~~~~
Some things to check if you tach is not moving then your CPS could be the issue. If then the o rings could be going on your IPR. Next time check to see if the tach is moving and I would get the truck checked for any codes. Also the next time it happens you need to check your HPOP to ensure that there is enough fuel in it.
What color is the exaust smoke when cranking hot?
http://www.fordtechservice.dealercon...iagnostics.pdf
Rocky
 
Reply
Old Dec 25, 2009 | 10:34 AM
  #5  
MADVAN's Avatar
MADVAN
Postmaster
Joined: Feb 2004
Posts: 3,266
Likes: 0
From: Levittown
Replace the IPR 0-rings or just change the IPR valve.
http://cw-diesel.com/LuxSite/IPRInfo.htm

Bill
 
Reply
Old Dec 25, 2009 | 12:27 PM
  #6  
vernon_25's Avatar
vernon_25
Thread Starter
|
New User
Joined: Dec 2007
Posts: 19
Likes: 0
please explain

i don't know the abbreviations, could you spell out the words for me so i know what your talking about, thanks
 
Reply
Old Dec 25, 2009 | 01:53 PM
  #7  
rideracelivemx7's Avatar
rideracelivemx7
Posting Guru
Joined: Mar 2009
Posts: 1,799
Likes: 0
yeah deffinely sounds like the IPR Injector Pressure....Relief? its on the very bottom of your hpop resevour.
 
Reply

Trending Topics

Old Dec 25, 2009 | 01:58 PM
  #8  
Iallwork's Avatar
Iallwork
Elder User
Joined: Sep 2009
Posts: 860
Likes: 0
From: Grantsburg,WI
IPR injection pressure regulator. I think it controls oil pressure to the injectors which are activated by high pressure oil from the HPOP (high pressure oil pump). Did I get that right guys. Anyway click on the link MADVAN gave you in his post reply.
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

 Verdad Gallardo
story-1

Top 10 Fords at 2026 Carlisle Ford Nationals

 Joe Kucinski
story-2

3 Best / 3 Worst Parts of Modern Ford Ownership

 Brett Foote
story-3

10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

 Pouria Savadkouei
story-4

Every 2026 Ford Engine Explained

 Brett Foote
story-5

10 Ugly Ford Trucks That We Still Kinda Love

 Joe Kucinski
story-6

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-7

Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-8

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-9

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
Old Dec 25, 2009 | 08:14 PM
  #9  
strokin'_tatsch's Avatar
strokin'_tatsch
Hotshot
15 Year Member
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
definitely the IPR o-rings. the IPR on the driver side of the HPOP(high pressure oil pump) which is right in front of the fuel filter bowl. so look in front of the fuel bowl and down on the driver side in the valley. there will be a 2 wire plug plugged into it. unplug it, take the tin nut off, slide the plug in portion off, then you can put your 1 1/8"? DEEP socket on there with a 1/2" drive ratchet to take the IPR out. You will probably need to take the fuel bowl out to get enough room to do it. i know some ppl have done it without taking out the fuel bowl, but its sooo much easier without the fuel bowl in there.
 
Reply
Old Dec 25, 2009 | 08:47 PM
  #10  
Iallwork's Avatar
Iallwork
Elder User
Joined: Sep 2009
Posts: 860
Likes: 0
From: Grantsburg,WI
Don't be afraid to take your fuel bowl off after you do it once it's a piece of cake.
 
Reply
Old Dec 25, 2009 | 09:25 PM
  #11  
blue66tang95f150's Avatar
blue66tang95f150
More Turbo
Joined: Apr 2003
Posts: 729
Likes: 0
Yep, IPR orings. I just went through this last weekend. Mine had two o-rings that were shot in it. One o ring was missing about 1/3 of it and the other was cut. I fixed it in less than an hour with out taking out the fuel bowl, that's including fishing, for 20 minutes, for a o-ring i dropped into the valley.
 
Reply
Old Dec 26, 2009 | 08:09 AM
  #12  
vernon_25's Avatar
vernon_25
Thread Starter
|
New User
Joined: Dec 2007
Posts: 19
Likes: 0
o-rings

is there a special o-ring kit i'm going to need. i have 2 boxes that have all the different sizes of o-rings in them, any help would be great, going to start the repair hopefully in a few hours, thanks
 
Reply
Old Dec 27, 2009 | 09:40 AM
  #13  
DRRXR's Avatar
DRRXR
Post Fiend
Joined: Feb 2009
Posts: 8,773
Likes: 1
From: Texas Coast
ipr parts

Originally Posted by vernon_25
is there a special o-ring kit i'm going to need. i have 2 boxes that have all the different sizes of o-rings in them, any help would be great, going to start the repair hopefully in a few hours, thanks
Replacement O-rings for Ford Diesel Engines
NEW 7.3 IPR Powerstroke Diesel Injector Pressure Valve:eBay Motors (item 200420086303 end time Dec-30-09 09:57:39 PST)
https://www.ford-trucks.com/forums/5...eparately.html
 
Reply
Old Feb 24, 2010 | 01:43 PM
  #14  
vernon_25's Avatar
vernon_25
Thread Starter
|
New User
Joined: Dec 2007
Posts: 19
Likes: 0
thanks for the help

i changed out the o-rings that day and have been driving it ever since, thanks for all the quick replies to help me out, sorry it took so long for me to get back with an update on it, thanks again
 
Reply
Old Feb 24, 2010 | 01:50 PM
  #15  
MADVAN's Avatar
MADVAN
Postmaster
Joined: Feb 2004
Posts: 3,266
Likes: 0
From: Levittown
Originally Posted by vernon_25
i changed out the o-rings that day and have been driving it ever since, thanks for all the quick replies to help me out, sorry it took so long for me to get back with an update on it, thanks again
Bad Bad Bad Vern



Bill
 
Reply



All times are GMT -5. The time now is 01:44 PM.

story-0
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level

Slideshow: The VelociRaptor Expedition gains a lift, upgraded suspension, Brembo brakes, and trail-ready equipment while retaining the stock 440-horsepower EcoBoost V6.

By Verdad Gallardo | 2026-06-12 11:01:55


VIEW MORE
story-1
Top 10 Fords at 2026 Carlisle Ford Nationals

Slideshow: Top 10 Fords at 2026 Ford Nationals

By Joe Kucinski | 2026-06-09 11:10:08


VIEW MORE
story-2
3 Best / 3 Worst Parts of Modern Ford Ownership

Based on years of owning multiple modern Ford products.

By Brett Foote | 2026-06-09 10:53:36


VIEW MORE
story-3
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches

SPONSORED: From muddy boots to rain-soaked cargo, these upgrades address some of the most common frustrations Ford truck owners face every day.

By Pouria Savadkouei | 2026-06-08 18:50:34


VIEW MORE
story-4
Every 2026 Ford Engine Explained

Here's everything you need to know about every Ford engine available for the 2026 model year.

By Brett Foote | 2026-06-05 12:58:01


VIEW MORE
story-5
10 Ugly Ford Trucks That We Still Kinda Love

Slideshow: 10 ugly Ford trucks that we still kinda love.

By Joe Kucinski | 2026-06-03 09:51:16


VIEW MORE
story-6
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-03 15:43:58


VIEW MORE
story-7
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-06-03 11:38:36


VIEW MORE
story-8
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-9
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE