P1689

[2000Ram2500]

Thats a tough call. I hate electronics on anything I mean if I could have a 98 12 valve I would do it in a heartbeat just to avoid having an ecm. But I love the functionality of having computerized things just because it's so easy to do and I like wiring things in idk why I just like putting electrical together and wiring idk if it's the challenge or what but it's never bothered me. I've messed with air lines before so I'm not afraid of going that route either.I just want to find a fitting that I can put in line between my injection pump and the hydraulic line that O'Reilly's made for me a couple years ago to use as my fuel line because right now the line is in the way of my power steering pump cap and putting a nice tee there would space it out enough to make it easier to get to my power steering. 

Edited October 8, 2018 by 2000Ram2500
Added pictures

[Mopar1973Man]

Vulcan Performance has Parker Push Lock Tee for fuel pressure.

 

[2000Ram2500]

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.

[Mopar1973Man]

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

[2000Ram2500]

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.

[int3man]

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

[2000Ram2500]

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.

[2000Ram2500]

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, 2018 by 2000Ram2500

[Mopar1973Man]

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.

[2000Ram2500]

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. 

[dripley]

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

[2000Ram2500]

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.