12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Building a 2001 12 Valve

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Old Sep 14, 2012 | 10:39 PM
  #61  
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Happy birthday to me! That computer FINALLY made it in
And then things got crappy
I hooked the computer up, threw her in gear, and went down the road.... in third gear. So still limp mode. I double checked, and as far as I can tell, not only is everything in the spot that it's supposed to be, but the 2001 Gas PCM and 1998 Diesel PCM are nearly identical. Like almost identical (aside from things like fuel injectors and that nonsense). I called around and talked to Craig from Goerend and found out that there is a difference between the 2001 47RE valvebody and the 1998 47RE valvebody. So we called our mechanic and asked what valvebody he used. Well, he used a 2001 46RE valvebody, what came in my truck originally. And I looked around. The 46RE and the 47RE pre 1999 look freakin identical. I'm about 50% positive that it's the valvebody, but I'm going to try to call Craig again and get more answers tomorrow morning.
The other 50% of positivity is that we might have wired something incorrectly inside the fuse box. The main plug that plugs in there might not be set up right, but I can't find the pinouts for the actual plug. It's really irritating.
I have an account on AllData, so if someone knows where it's at on there, let me know so I can find the sucker!
Anywho, tomorrow is supposed to be the day it shifts, and I'm not so sure it is going to happen, but I'm gonna work my butt off to make it happen!
And tomorrow night, I will literally be at the Jason Aldean concert. If my truck makes it to the concert, you'll see some end result photos!
Later
 
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Old Sep 21, 2012 | 09:31 AM
  #62  
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It's been a week since we got that computer and there still haven't been any real results with the transmission. We found out the wrong pressure solenoid was in it and got it swapped to the right one, but that didn't fix it. We noticed a couple wires were missing and we added them in, still nothing. The OSS on the transmission wasn't showing ANY output speed when we were moving, so we replaced it, but we still aren't entirely sure of it because we don't have the 5k programmer to check it right now. One of our friends suggested that the grounds were messed up. So last night I started with the ground that comes off of the Vehicle Harness Connector (8 wire plug that connects to the transmission) and I connected it directly to the ground on the battery. I didn't unplug it from the PCM I used these little connector doo-hickies that my Dad has, and it basically splices a wire in without cutting the main wire.
Unfortunately something else is wrong, and I have no clue what and my Dad is in Florida to check on the family trailer park. When I took her for a test ride last night I got maybe a mile down the road and she started rumbling real hard. I thought maybe the transmission was messed up, so I put it in neutral. Still rumbling. And when I was on my way back I kept hearing the waste-gate dump even when I barely touched the gas. I took two videos that I will upload in a bit. Here's kind of what it seems like to me: when I had my 88 Chevy the last owner had messed up the spark plug wires, so it fired out of order and caused a loss of power and deep rumbling/rocking of the truck, just like now. But that still doesnt seem to explain the constant waste-gate dumping. Any help here?
 
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Old Sep 21, 2012 | 12:41 PM
  #63  
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Post a video....
 
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Old Sep 22, 2012 | 07:28 AM
  #64  
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Here ya go, hope it helps some. I'm actually thinking that some of it might be the turbo. I think that the squeaking in the video is either the turbo or how the exhaust is mounted.

Truck Problems Part 1 - YouTube
 
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Old Sep 22, 2012 | 08:25 AM
  #65  
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i'm not sure what to think of this, but sounds to me like there's some metal to metal rubbing...
 
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Old Sep 22, 2012 | 07:07 PM
  #66  
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Here's a second video I took of outside views of the truck and what it is doing etc etc. Hope maybe it helps. The squeak you hear in the first video I know is metal on metal, but I'm talking about how oddly the truck is running. I have also lost power and the whole truck shakes now. I know for a fact it didn't do that before. I'm really hoping I didn't blow the head or the turbo, but I really have no clue what it could be. Diesels are entirely new to me haha.

Truck Problems Part Dos - YouTube
 
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Old Sep 23, 2012 | 08:00 AM
  #67  
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Bent valve perhaps?

This is definately not the turbo, but sounds like an exhaust leak, but that occasional pinging sound is definately not good, could be anything from a spun bearing to bent valve...

Hope it's nothing serious though, has your dad had a chance to look at it?
 
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Old Sep 23, 2012 | 09:37 AM
  #68  
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No he is still in Florida and won't be back until tomorrow. I'm trying to get one of our diesel guys to come look at it today. I don't see how a bent valve or spun bearing would cause excessive waste-gate dump though?

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Old Sep 25, 2012 | 09:25 AM
  #69  
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I got some good news yesterday . Our residential Cummins Genius stopped by to check out the truck, and here's what we ended with: we are going to roll the truck over to top dead center on the motor, then lash the valves. He listened to the video and heard the truck run (which was running a whole lot better for some reason, still rumbling though) and told me that the reason the turbo was dumping waste like that is because some of the valves probably had too much play in them, causing a valve to be open when it shouldn't be. After we lash the valves, we are going to roll it to TDC again and then have him come back over and re-time the pump. He says the reason it was rumbling is because the timing on the pump slipped. Hopefully that really is the issue, and we can have the truck running normally again by this weekend.

I was also talking to my Dad, and his electrical engineer friend is going to come by again this weekend to take a look at all the wires and see if we can't figure out why the transmission still won't shift. And if we can't figure it out this weekend, I think we are going to either pull the tranny or buy the Simple Shift from PCS.

Thanks for the help and thoughts, angelic0-, I really appreciate it. Hoping to have some more info (and a running truck) by this weekend!
 
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Old Sep 29, 2012 | 11:13 PM
  #70  
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No running truck but we did get quite a bit accomplished. First and foremost, we got rid of that troublesome brights indicator. I think something else was accomplished while we worked on that, but to be honest I'm not entirely sure
We also figured out what was up with the truck running odd.

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Needless to say, that nut isn't supposed to be laying there and that rod isn't supposed to be disconnected either. That was literally all that was messed up. The pump was still timed to exactly 18, so no slippage. And with that valve fixed, she purs again
And back to some bad news. The PCM isn't flashed properly. AGAIN! However, I got a little lucky. We obviously need to get a properly flashed PCM, but instead of asking those dumb@$$3$$ in FL to do it, we are trying to find a dealership around here to reflash one of the other PCMs we have. The luck part: the couple that was here looking at our house saw that I was working on the truck, and the husband is a Cummins Engineer in Columbus, and I asked him if he might be able to get one of them flashed. He gave me his card and told me to send him an email with exactly what we need, and he would see what he can do
And then of course I still have to call in to FL all and get them to refund my $$$
Lets just say it's going to be a long week
 

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