Did some searching around and figured I would post my experience here. Alot of people replacing the VPs over this it seems like. I went onto the dealer site and found the diagnostic tree for this code. Nowhere does it say replace the pump. It says either electrical/wiring issue which I understand could be the circuit in the pump, or the ECM.

 

Personally I am assuming my circuit board is fine and I have a problem elsewhere. I live where there is an issue with rat damage. My pump is tapped for the Edge. I had a spare APPS to try. I tried the relay swap that moparman suggests. I cant fully rule out alternator noise but i have the BD kit and keep that ground wire routed over my intake tube to keep it off the back of the alternator and I haven't had the torque converter issue in months which I would notice because I have a triple disc converter you know when it locks up. I've been researching all week and finally yesterday had a chance to do some actual work on the truck.

 

I disconnected the batteries and left the key on the whole time to do a reset as I saw someone suggest I just did it for a couple hours while i was working on it and so i didnt zap myself somehow. I got the APPS out of the way so i could really look at the wiring underneath. The plug on the VP looks fine and the terminals had plenty of grease, same for the APPS connector. The APPS sensor itself had a rusted out imprint of the bellcrank arm in it which im sure is to be expected from snaps of the throttle and years of weather and maybe it was causing the sensor some confusion? I changed it anyways.

 

Given that my pump is tapped for the Edge i suspected possibly an issue there but the tap was still in there nice and solid. I looked and felt around as best as i could to hopefully rule out rat damage and I couldnt see or feel any chewed up wires all the way up to the ECM connector. However i did notice a tiny little nick in the tap wire itself right next to where the grid heater wire comes up to the intake horn. I fixed that little nick and got the wire cleaned up. It got me wondering though, could the grid heater have caused the intermittent loss of power somehow because it runs so close to the tap wire, and i know those relays kick on randomly while driving. It would cut out more so right after start up and really only from 25 to 45, and on a longer trip across town by the time i got by my destination the loss of power was gone i had no symptoms of the code anymore other than the light on the dash. I've been running the edge on stock all week just to be safe and even cranked it up to 5 and it was running like a beast.

 

So this is where I'm at with this. Basically Im just wondering if that huge grid heater wire was giving off interference through my edge tap wire and causing my problem. Gotta run errands and will see if what i did yesterday fixed my issue.

Vulcan Performance has Parker Push Lock Tee for fuel pressure.

 

I cannot for the life of me remember what size it ended up being. Line or the fitting for that matter. 3/8s maybe? I'm assuming yours looks like half inch and mine looks smaller. I might be able to dig up a receipt.. but who knows that was one house and another state away.

I'm pretty sure Vulcan has 3/8" line fittings too. You'll have to call and ask him.

I'll probably end up going that route. I was thinking something like this though to space the line out away from being in the way of my power steering but that's just me being picky. And probably not this exact one but similar.

Hi 2000Ram2500,

                              No expert here but I (2001) chased an intermittent 1689 only to find out that the Fuel System Relay in the PDC was / is Bad.  Making intermittent contact, random cut outs, getting worse, and worse.  I just swapped it with a spare relay and the problem went away.  Your mileage may vary.  Good luck with your hunt.

 

Michael

19 minutes ago, int3man said:

Fuel System Relay in the PDC was / is Bad. 

 

Thanks but I've checked that a few times now.. Ohms check out good and i've swapped it out with known good relays as well with no luck. So far today its been working well with the edge tap wire disconnected and cleaning and putting dielectric grease on all the related connectors. So i guess fingers crossed again that i somehow fixed it by doing that.

I can't stop from wondering about the cummins datalink connector. The triangle 3 pin connector. Where the edge connects to that what purpose does that serve? I'm hoping @Mopar1973Man at least someone who knows more about the cummins side of things.

 

The edge scanner only reads PCM codes I'm assuming. But what if the ecm is telling the pcm to throw that code because the edge has taken over the loop between the VP and the ecm using the datalink connector and pump tap and my sloppy datalink connection was so intermittent that it would cause the code. Which would explain the loss of power experienced alongside the symptoms of the code. Is that even remotely on the right track?

Edited October 9, 20186 yr by 2000Ram2500

Basically that is a CANBus connector that only talks to the ECM. Typically all the tune information is jacked in as a priority message which overrides the ECM information.

 

Now if you were to be using Quadzilla you would understand more about what information is on that CANBus.

I havent updated this so Im just gonna post my results. I got a new plug to replace the edge side of the data link connector. Drove it a few days and problem comes back. I noticed that my edge wasnt giving me a boost reading. I started a thread on that because i thought it was a seperate issue. And as I found out then I needed to replace my map plug on the edge side as well. That didnt fix it so i jiggled some connectors around and it went away. It has been several weeks now I think since then and still running strong.

 

Im posting here updating now because I remember seeing somewhere it was mentioned that a bad map sensor was the culprit of this problem. 

It can be either. Bad sensor/wiring. Who knowsfor sure. I have one of the newer 2nd gens at 17 years old.

I forgot to mention that I replaced the map sensor as well with no change. That was when i discovered it was the original map sensor that was in there. Has the cummins number stamped in it anyways so it was at least a factory replacement. But like i said i just messed with a bunch of connectors and its been working ever since.

 

Just doesnt make a whole lot of sense that the map sensor would cause a loss of communication code for 2 completely seperate components. I am lucky so far that i havent had to mess with any of the factory wiring yet with the exception of the w-t mod all my original connectors are intact. I have a bad feeling i will have to repair the vp plug at some point though the insulation on the wires right where they go into the plug are looking pretty rough. But its not a problem yet because after running all the tests it checked out in good shape.