96 - 94.5 powerstroke part swap can I do it?

[trythis]

I'm working on the 1994.5 super duty powerstroke and I think my problem is in my IPR valve when I started looking at it I found the little nut on the end of the IPR in the valley. We had drove the truck home and parked next morning it was a no start. Started looking around and found that nut off. Now I would say about two years ago I had a problem with the IPR and I pulled the one off of my parts truck which is a 96 otherwise the same truck. I put that on and it ran until now. Now looking into this more that shouldn't have worked or at least that's how I'm being led to believe.
So as you may know if you try to buy the 94.5 IPR it's a whole different deal, ( edge filter and i have heard check valve unlike later models ) I think.
So here I am I've got 3 IPR valves one that I got from online says it's a motorcraft but it's not. one that I took out of 2000 parts truck and one that I already had. I have never seen a known IPR valve from a 94.5. But from what I've read I would expect them to be obviously different. Hopefully someone will set me straight on this.
I did order a new IPR valve from o-ring diesel and the gasket for the high pressure reservoir gasket to fit the 96. Because I do suspect my hpop on the 94.5 could be a problem that and I may need to switch to the 96.

I'm really looking for someone that can set me straight on mixing and matching these parts from my 96 to my 94.5. Looks like I would be best off just to change my timing chain cover and use all 96 parts but I don't know if I'll run into something else that would prevent the swap.
So I guess it's as simple as if the timing chain cover will come off the 96 and fit on my 94.5 then I should be able to use all 96 parts on top of the timing chain cover. Thank you for any assistance

 

[trythis]

No takers? I guess if you really haven't been into these early models and seeing the difference in the change you just don't know and that's where I'm at.
AI says the 1994.5 IPR valve how to check valve image they eliminated that in 1996 input check valves in the outlet ports on the pump. So as I mentioned above my parked truck is a 96 according to the title and it does not have any check valves in the fittings on the pump. I cannot trust AI I have been there before. Hoping someone that knows will jump in here and set me straight.

 

[Black dawg]

Are you sure the valve is bad? Without the nut and spacer, the valve does not get controlled very good and can cause no starts and stalling.

 

[trythis]

Thank you for your reply black dawg. I'm hoping you're right I cleaned it up and put it back in. When the batteries charge good I'm going to try to start it again.
I seen a video online actually a couple of them testing the IPR with air pressure one tested them at about 5 lbs the other tested about 20 lbs I have tested three different IP Rs and have to use over 25 lbs to get air to flow through them. The original IPR that I took out of this 94.5 musta been replaced somewhere in its 220,000 miles because it looks the same as the one I took out of a 96 and a 2000.
I know this is a common problem most of you have been through it before so it's not very exciting but I would appreciate any input suggestions advice. This is my tool truck and I gotta get it running.

 

[trythis]

OK clean up the IPR fixed the problem I'm now getting 1000 PSI on my fuel rail but I still have a no start situation the fuel bowl is full I get 40 PSI at the Schrader valve. I also have seen a very little smoke but there is some I have cranked it quite a bit. Maybe not enough. Just hate to keep cranking

 

[Black dawg]

How and where are you measuring the 1000psi?

 

[Black dawg]

Does this still have the early computer as well? If so come up with a newer one so you can get datastream from it.

 

[trythis]

The cps must be working because the tack is moving
voltage drops to 10.9 when cranking Ford 15 to 20 seconds

 

[trythis]

there's a fill plug at the top of the HPOP....remove, and oil level should be right to the top......

How and where are you measuring the 1000psi?

Does this still have the early computer as well? If so come up with a newer one so you can get datastream from it.

oil is right at the top of the hpop cover
3000 psi gage at the rail reads 1000+ psi
it does have ecm out of the 1996

 

[Black dawg]

My next step would be to plug scan tool in and check cps signal on there, and buzz test.

 

[trythis]

Well it looks like the 96 PCM failed. I put the original 94.5 PCM in and it fired right up.
So my question now would be can I use the PCM out of the 2000 F-250 four wheel drive?

 

[trythis]

My next step would be to plug scan tool in and check cps signal on there, and buzz test.

Does this still have the early computer as well? If so come up with a newer one so you can get datastream from it.

Where can I learn more about that I'd love to be able to hook up to it. it does have a check engine light on now.

 

[aggiediesel01]

I’m pretty sure the the pre ‘96 pcms supported obdII diagnostics but the wires weren’t run. I’ve read about how you can add the wires on other sites but I don’t have specifics or remember which site to go to a good google search should turn them up. Many of the 94-97 pcms are interchangeable if they’re 49 state/single shot injector variants, the 96-97 Cali trucks are different. The ‘99 and later PCMs are pretty different. If you want to have yours rebuilt, check out Diesel Technology of Chattanooga or dieseltechchatt.com. I’ve used them before and I’m happy with their service and products.

As for the IPR the ohms of the coil are important to check. Somewhere around 9-11ohms I think, closer to one end is supposedly better than the other but again I don’t really remember the specifics, it’s out there in the interwebs. For the early vs late IPR differences, I’ve completely disassembled each type to clean them and I’ve not been able to measure any mechanical/tolerance difference components of the IPR except for the little aluminum cap on the end. That cap can be removed from the end if you don’t need it or added to one that doesn’t have it if you do. I have used the early style in my ‘97 without an issue but I removed the little cap. There are a few YouTube videos on how to disassemble them for cleaning.