No start when the engine is warm
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Joined: Aug 2009
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No start when the engine is warm
I read through the majority of the "sticky" thread and didn't see the issue that I am having.
I have a 94.5 super duty that is a retired and very tired fleet maintenance tire truck. It has a PS engine I believe based on what I have read here.
The truck starts well first thing in the morning. I drove it a couple of miles to warm it up and everything looked good. Parked it back at the shop and shut it down. Tried to restart it and it would not. It cranks but doesn't seem to even try to fire.
They mentioned that they have had the issue of it not wanting to start again once it started in the morning. Their work around was to keep it running all day.
Only 185k on the engine.
Why might the truck not want to start again when it has started cold easily but won't start warm immediately after being run?
I have a 94.5 super duty that is a retired and very tired fleet maintenance tire truck. It has a PS engine I believe based on what I have read here.
The truck starts well first thing in the morning. I drove it a couple of miles to warm it up and everything looked good. Parked it back at the shop and shut it down. Tried to restart it and it would not. It cranks but doesn't seem to even try to fire.
They mentioned that they have had the issue of it not wanting to start again once it started in the morning. Their work around was to keep it running all day.
Only 185k on the engine.
Why might the truck not want to start again when it has started cold easily but won't start warm immediately after being run?
Logistics Pro
Joined: Oct 2008
Posts: 4,818
Likes: 1
From: Avilla, IN
I don't know what a new IPR costs, but if their expensive, I'd just start by replacing the O-rings. The IPR itself rarely fails.
https://www.ford-trucks.com/forums/8...-this-one.html
https://www.ford-trucks.com/forums/8...h-or-ford.html
https://www.ford-trucks.com/forums/8...-this-one.html
https://www.ford-trucks.com/forums/8...h-or-ford.html
Post Fiend
Joined: Mar 2006
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From: Vacaville, Ca
Cody, I was thinking it was a fuel line too. That is the same one I blew when I shimmed the FPR. But I did not think that I had enough experience to question Joe. I did not want to look DUMB if I was wrong either.
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In many areas Diesel Fuel is called "Fuel Oil". I am confident that is why Joe called it an oil line.
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Post Fiend
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From: Belair md
well first off i called it an oil line cause it was late, and i wasnt paying attention...lol its an old picture and i am too lazy to change the label
but we do have "fuel oil" in these here parts....lol and my area is defintatly full of weird and crazy people. we typicly call fuel oil "offroad diesel" and "heating oil" anyhting you buy at the pumps is just "diesel" when you call teh heater guy he sells me "no 2 fuel oil"
but we do have "fuel oil" in these here parts....lol and my area is defintatly full of weird and crazy people. we typicly call fuel oil "offroad diesel" and "heating oil" anyhting you buy at the pumps is just "diesel" when you call teh heater guy he sells me "no 2 fuel oil"
More Turbo
Joined: Apr 2003
Posts: 729
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I read through the majority of the "sticky" thread and didn't see the issue that I am having.
I have a 94.5 super duty that is a retired and very tired fleet maintenance tire truck. It has a PS engine I believe based on what I have read here.
The truck starts well first thing in the morning. I drove it a couple of miles to warm it up and everything looked good. Parked it back at the shop and shut it down. Tried to restart it and it would not. It cranks but doesn't seem to even try to fire.
They mentioned that they have had the issue of it not wanting to start again once it started in the morning. Their work around was to keep it running all day.
Only 185k on the engine.
Why might the truck not want to start again when it has started cold easily but won't start warm immediately after being run?
I have a 94.5 super duty that is a retired and very tired fleet maintenance tire truck. It has a PS engine I believe based on what I have read here.
The truck starts well first thing in the morning. I drove it a couple of miles to warm it up and everything looked good. Parked it back at the shop and shut it down. Tried to restart it and it would not. It cranks but doesn't seem to even try to fire.
They mentioned that they have had the issue of it not wanting to start again once it started in the morning. Their work around was to keep it running all day.
Only 185k on the engine.
Why might the truck not want to start again when it has started cold easily but won't start warm immediately after being run?
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Joined: Aug 2009
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Not yet
I have not. This is an "extra" vehicle and now that it is cold here in Kansas I probably won't attempt to do anything until spring. I will be doing what was suggested in the other post when I do. The comments sound very reasonable. I looked for parts to do it a while back and I think it is not to bad.
Look at the second post on this thread. The one by c00nhunterjoe with the pictures. If you look at, I believe, the second picture he has a green circle and a green arrow. The green arrow is pointing at the IPR which is below the electrical connection which you see. If you look real close at the top of the electrical connection below the wires you will see the nut and some of the other parts of the IPR.
Joe was saying with the engine and fuel cold the system is able to develop the proper amount of high pressure in the system. Once the system and the fuel is hot it is viscus enough that the fuel will leak past the o-rings in the IPR and not allow enough pressure to build in the system to start. It can still get enough pressure if the engine is running but not to start.
Look at the second post on this thread. The one by c00nhunterjoe with the pictures. If you look at, I believe, the second picture he has a green circle and a green arrow. The green arrow is pointing at the IPR which is below the electrical connection which you see. If you look real close at the top of the electrical connection below the wires you will see the nut and some of the other parts of the IPR.
Joe was saying with the engine and fuel cold the system is able to develop the proper amount of high pressure in the system. Once the system and the fuel is hot it is viscus enough that the fuel will leak past the o-rings in the IPR and not allow enough pressure to build in the system to start. It can still get enough pressure if the engine is running but not to start.
Last edited by markbr52; Dec 20, 2009 at 10:00 AM. Reason: added more detail
Logistics Pro
Joined: Jul 2001
Posts: 4,137
Likes: 41
From: Marble Falls, Texas
The IPR only controls the High Pressure Oil. I does not control fuel flow so to speak. But yes, when the oil gets warm, it will go past the bad o-rings on the IPR causing a no start.