Ya, I bought it and laid it in spare parts bin #83 in the back seat. Like I said, I don't need it til april so you are welcome to it.

 

Where the heck have you been Bill? Did the IDM fix it?

 

I've been right here! LOL!! The IDM fixed the one bank of injectors shutting down, but still has the rough/surging idle, and stumbling shutter and certain rpms.

 

I think it needs stage 1's with a T500 and some good tunes. That should fix it!

It was nice chatting with you last night. Like I said on the phone, I would try to ohm through the harness from the PCM to the IPR and ICP and make sure you have good solid connections to both of those devices. Here is the PCM Pinout:


And the legend


Other than that, I would also post up what you told me you were seeing about the ICP Pressures while you're cruising. I'm no expert but that seems odd to me. Maybe some of these guys that have more experience with the ICP and Duty Cycles can tell you if what you're seeing is normal or not. ICP and D/C while cruising and WOT should tell you if you're losing pressure somewhere or if the HPOP is worn out. I just don't have a scangauge on mine (yet) so I don't have any basis for what is normal.

Another thought crossed my mind while we were talking but I don't know if I mentioned it or not. When you tried the other PCM, was that before of after the IDM was replaced? Again, maybe it is a stretch, but I think it is possible that you had a couple different problems that were working together to produce the issues you have been seeing. Now that you have the IDM straightened out, I wonder if it wouldn't be worthwhile to go through some of these tests again (at least some of the easier ones).

 

^ this man thinks of things I wouldnt think of.

I have a mental checklist and once I checked the PCM I wouldnt think of it again until some outsider points it out to me!

Good man!

 

Thanks Nate, it was nice talking to you also. The PCM change was after the IDM. I was saving for stage Is and a T500, but just spent my savings today on my wife's Christmas present. I got a killer deal on a 12' x 18' building for my wife a wood work/gardening shop. It's insulated and wired for electricity. It needs a little work, but I got it for $300. It's not a manufactured building, it was built on site as a concession building at a high school and was moved a long time ago. Now I'm gonna move it with my limping truck! LOL!!
I'll try checking the harness from the PCM, thanks bud.

 

Very nice! I have no idea what to do for my wife a present yet.i hate this crap.
Wish I could do ANYTHING to help fix your truck.if I knew anything about this 17deg pump I would let ya try it out.

 

Like Nate said Aaron, I think a T500 and stage Is would fix it. I have a chip coming from Mike, so that was going to be my next move. I still drive my truck, but it just doesn't have the power it should, and now I'm gonna move this building with it. Maybe what ever it is will just give out, and I can put my finger on it.

 

Yep,I think it would "fix " mine right up as well.I got a feeling once the inj are apart the problem will become clear.just my gut feeling,not scientific at all.

 

No matter how hard I run my truck, the IPR DC% never gets higher than 39%-39.5%. The ICP will get up around 2900 psi., is that DC% high enough?

 

Looks like you have a very good HPOP, at least for the flow demands of your injectors. 35% DC at WOT, and 2900 PSI for the entirety your foot is down is pretty good.

At WOT DC shouldn't exceed 65% or so, and shouldn't be less than 1800 PSI.

 

Yeah, but it still runs like crap LOL!!

 

Bill, some good information on this site to check out ...

Diesel Diagnostic information for Powerstroke 6.0, 7.3, IDI 7.3 and 6.9 L, by Oregon Fuel Injection

It should link you to the 94.5-97 OBS but if not just scroll down a bit. I've tried to keep up with this thread but with 23 pages ... duh, I'm lost and certainly don't want to repeat others. Maybe just a short synopses on progress and what has been done.

 

Thanks Jim. I know it's a long drawn out thread. I was just wondering about my DC%. I've pretty much given up on this thread until I got some thing figured out cause I didn't want to keep dragging it out LOL! Thanks for the link, I'll look it over.

 

Yeah, it may, but I would look elsewhere with those kind of numbers. I guess the only thing to do would be to do a cold ipr dc/psi test, a load/wot ipr dc/psi test, and a hot neutral ipr dc/psi test.