P 1689 code - Competition Diesel.Com

9 LIVES · 12-07-2021, 08:53 AM

We've gotten a p1689 code on our vp truck. The truck will routinely stumble and sound like it has stumbled then pick back up.

My fuel pressure gauge reads 15psi at idle and 5psi under throttle.

I have only owned this truck since this past summer. The previous owner had put a new vp44 on it right before we bought it. The wiring on the back of the pump looks kinda suspect. Do you think the wiring is what would cause this code ?

dieselbeef · 12-07-2021, 08:56 AM

comm error...that iring is shit...solder it and shrink wrap it...after thats a for sure fixed..see what happens but thats def not good....

dieselbeef · 12-07-2021, 08:58 AM

comm error..that wiring is shit...solder it and shrink wrap it...looks like they broke the plug getting it off..thats def an issue...see if it does it after that is fixed....that goes right to the ecm

1320Cummins · 12-07-2021, 03:04 PM

P1689 - No Communication Between ECM & Injection
Pump Module

9 LIVES · 12-11-2021, 08:00 AM

So I pulled the wire harness loose from the pump and no sooner did I do that and two wires popped loose out of the little plastic connectors. So I am assuming they were the culprits of the no communication code. I soldered the wires together and went for a 30 mile trip with no issues....fingers crossed, I hope this was it!

Red Sleeper · 12-12-2021, 06:09 AM

Glad you found the issue.

Are those exposed wires in the picture? South of the butt connector. Wonder why they were spliced.

dieselbeef · 12-13-2021, 05:51 PM

we told ya..we know everything..lol

9 LIVES · 12-17-2021, 07:20 PM

Quote:

Originally Posted by Red Sleeper

Glad you found the issue.

Are those exposed wires in the picture? South of the butt connector. Wonder why they were spliced.

It was one wire that was exposed....couldn't figure out why! it was basically naked pretty far back into the plastic sleeve that the 3 wires were in. So I isolated that wire and wrapped it in electrical tape and then put the wires into wiring loom the best I could.

dieselbeef · 12-20-2021, 11:54 AM

need to find a good harness and cut it off a ft from the plug..solder and insulate em righ and be done with it...

12-07-2021, 08:56 AM	#2
dieselbeef Name: dieselbeef Title: dick doggin Status: Not Here Join Date: Jul 2007 Location: myakka city florida Member`s Gallery Posts: 9,866	comm error...that iring is shit...solder it and shrink wrap it...after thats a for sure fixed..see what happens but thats def not good.... __________________ 02 quad cab 4x4 aluminum flatbed 63/68/14 hrvp INJ by weston 4.10 gorend/suncoast method race 01 2500 4x4 quad cab all stock/drag comp 07.5 3500 4x4 dually 4 dr 6.7 d&j extreme, fleece cheetah, gorend triple, cat filters, rip wrongway...

12-07-2021, 08:58 AM	#3
dieselbeef Name: dieselbeef Title: dick doggin Status: Not Here Join Date: Jul 2007 Location: myakka city florida Member`s Gallery Posts: 9,866	comm error..that wiring is shit...solder it and shrink wrap it...looks like they broke the plug getting it off..thats def an issue...see if it does it after that is fixed....that goes right to the ecm __________________ 02 quad cab 4x4 aluminum flatbed 63/68/14 hrvp INJ by weston 4.10 gorend/suncoast method race 01 2500 4x4 quad cab all stock/drag comp 07.5 3500 4x4 dually 4 dr 6.7 d&j extreme, fleece cheetah, gorend triple, cat filters, rip wrongway...

12-07-2021, 03:04 PM	#4
1320Cummins Name: 1320Cummins Title: 2G Collector Status: Not Here Join Date: Feb 2009 Location: Houston TX Member`s Gallery Posts: 330	P1689 - No Communication Between ECM & Injection Pump Module __________________ 01 2500 QC SB 47RE 4X2 02 3500 QC 48RE 4X4 96 2500 CC NV4500 4X4

12-11-2021, 08:00 AM	#5
9 LIVES Name: 9 LIVES Title: Demolition Expert Status: Not Here Join Date: Oct 2006 Location: Midland, NC Member`s Gallery Posts: 4,051	So I pulled the wire harness loose from the pump and no sooner did I do that and two wires popped loose out of the little plastic connectors. So I am assuming they were the culprits of the no communication code. I soldered the wires together and went for a 30 mile trip with no issues....fingers crossed, I hope this was it! __________________ 2001 Dodge 3500 Flatbed 1995 Dodge 3500 Flatbed 2021 Ford F-250 7.3 Heads I win, tails you lose.... -Lee-

12-12-2021, 06:09 AM	#6
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,595	Glad you found the issue. Are those exposed wires in the picture? South of the butt connector. Wonder why they were spliced. __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd

12-13-2021, 05:51 PM	#7
dieselbeef Name: dieselbeef Title: dick doggin Status: Not Here Join Date: Jul 2007 Location: myakka city florida Member`s Gallery Posts: 9,866	we told ya..we know everything..lol __________________ 02 quad cab 4x4 aluminum flatbed 63/68/14 hrvp INJ by weston 4.10 gorend/suncoast method race 01 2500 4x4 quad cab all stock/drag comp 07.5 3500 4x4 dually 4 dr 6.7 d&j extreme, fleece cheetah, gorend triple, cat filters, rip wrongway...

12-20-2021, 11:54 AM	#9
dieselbeef Name: dieselbeef Title: dick doggin Status: Not Here Join Date: Jul 2007 Location: myakka city florida Member`s Gallery Posts: 9,866	need to find a good harness and cut it off a ft from the plug..solder and insulate em righ and be done with it... __________________ 02 quad cab 4x4 aluminum flatbed 63/68/14 hrvp INJ by weston 4.10 gorend/suncoast method race 01 2500 4x4 quad cab all stock/drag comp 07.5 3500 4x4 dually 4 dr 6.7 d&j extreme, fleece cheetah, gorend triple, cat filters, rip wrongway...