Engine/Transmission (1998.5 - 2002) 1690 code new vp44, ecm, cam sensors PLEASE HELP

[JCurry]

Been having problems with my truck throwing the 1690 code and missing at idle. I took it to a shop and they told me i had a bad ecm. So i got a computer from Auto Computer Exchange. Disconnected batteries for 2 hours, took old ecm out put new one in. Cleared the codes with my scanner, started it up, same problem. 1690 Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor comes up 5 min after its running. So i take it back to the shop, he calls me the next day, says its my VP44.

So... ... . Ordered VP44 from Gus @ Farmboys, got it in this mornin, put it in when i got off work and it ran fine for 15 min. Started driving it around, Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor AGAIN!!! Truck misses at idle just like it did before the 2 cam sensors, timbos apps sensor, (tried working stock one too), ECM and VP44. Truck runs fine above 1500 rpm and sometimes will idle fine for 5 min before missing again. Anyone have any other ideas? Im gonna take it back to the shop tomorrow but was hoping someone had some other ideas. THANKS!!!!

 

[BEnglish]

What year is your truck?

I ask because I ordered an ECM from ACE and when I got it there was no communication with my injection pump. Put the old one in and it communicates fine. Sent it back with a note attached and called to explain the problem, and so they reflash it and sent it back to me (they said they were out of stock and the sorry looking one they sent me was the last one they had). Well I put it in and same thing, no comm. with the ECM. I called and I have now sent that one back too and I will call them when it gets there and hopefully will get back an ECM I can use.

Not saying that the ECM you got from them is the problem but it was mine.

My truck is a 98. 5 though and maybe that is what the confusion is.

Another thing that made me scratch my head was, for both times they sent me the ECM, they called first asking if the truck was an automatic or standard. But they have the vin. I thought they would be able to figure that out by having the vin, but maybe not.

 

[JCurry]

Wow thanks for the reply. I will call them in the morning and get it sent back. Not sure if it is for sure the problem but sure worth a try since its free replacements.

 

[CAPTPHIL]

To make sure you have the right parts use engine serial number because it is CUMMINS part not Dodge. GOOD LUCK

 

[BEnglish]

To make sure you have the right parts use engine serial number because it is CUMMINS part not Dodge. GOOD LUCK

They require the ECM serial number and part number.

 

[CAPTPHIL]

My error. I only deal with Cummins for my eletronics for warr. and service. Sorry

GOOD LUCK

 

[BarryG]

Ben

I had the same problem for months and tore my hair out trying to figure it out. In addition to the steps you did I tested every wire in those affected circuits for continuity, proper voltage, plug pins, connectors, the tone ring for the cam etc all to no joy. One day I was servicing my truck- oil change fuel filter etc. I had remembered reading something about the alternator wires causing some funky electrical problems on here so I checked them over very carefully, seperated them apart as much possible and everything looked fine. However since that day I have not had the problem recur. Might be worth a look at the alt wires. I may try shielding them if it comes back. In any case if it comes back that is the first place I will look. There may be too much ac voltage bleed out dont know as since it fixed it I never did test for that but will if it comes back. It has been over a year now with no reoccurance.



By the way depending on the year of the truck it may have a crank position sensor in addition to the cam sensor not sure when they dropped the crank sensor but my 01. 5 does not have one but I am pretty sure the 99's do unsure of the 00's.

 

[JCurry]

Thanks i will check the alt wires now! My truck is an 01 and doesnt have the crank sensor. Kinda wish it did since that would prob be the problem haha

 

[JCurry]

Checked alternator wires, separated them, took them off cleaned the connections. Got another ecm from ACE and it still does the exact same thing. Any other ideas? Im going to take it back to the shop tomorrow.

 

[FDavid]

I would double check the key on the pump gear.

 

[BEnglish]

I ordered an ECM from ACE and when I got it there was no communication with my injection pump. Put the old one in and it communicates fine. Sent it back with a note attached and called to explain the problem, and so they reflash it and sent it back to me (they said they were out of stock and the sorry looking one they sent me was the last one they had). Well I put it in and same thing, no comm. with the ECM. I called and I have now sent that one back too and I will call them when it gets there and hopefully will get back an ECM I can use.

Not saying that the ECM you got from them is the problem but it was mine.

My truck is a 98. 5 though and maybe that is what the confusion is.

Another thing that made me scratch my head was, for both times they sent me the ECM, they called first asking if the truck was an automatic or standard. But they have the vin. I thought they would be able to figure that out by having the vin, but maybe not.

I want to update with my progress.

Well after ACE sending me the same ECM 3 times and it not communicating with my injection pump control module all three times, I asked them not to send it back and to send me a different one. They did and I put it in and the engine fires right up. I am now happy as a clam.

I don’t know what was wrong with the one they sent me, but it didn’t work.

 

[JCurry]

Sending mine in for a 3rd time, i did the same and told them to send me a different ECM. Sure hope its that easy! Was your truck missing at idle with the bad ecms?

 

[BEnglish]

I was replacing the ECM for another reason, so the original one I had made my truck run fine.

The one they sent me (same one three times) didn't even start my truck so I was forced to put the old one back in, which like I said, made the truck run fine (had another problem).

They did listen to me and sent a different one the fourth time and it did not have the communication trouble the first one they sent me had.

I never had an idol issue, it simply didn't communicate with the injection pump module and the truck wouldn't start.

they are an easy CO to do business with IMHO

 

[JCurry]

Got #4 in. Different ECM and the same issue... Any more ideas?

 

[JCurry]

Ok took it to the dodge dealer... . $2098 later... same issue. They put in a BRAND NEW ECM, BRAND NEW VP44. Checked all wiring. Same issue as when i brought it in P1690-FUEL INJECTION PUMP CKP SENSOR DOES NOT AGREE WITH ECM CKP SENSOR
Only code that comes up. Can anyone here help me? I have spent so much money on this thing and it seems as though no one can fix my truck? I havent had this thing over a year and would pay someone to help me get it fixed. I live in Canon City Colorado and need a competent diesel mechanic, these dodge dealers have no clue their head from a hole in the ground. I told them i already replaced that stuff but they GUARANTEED it would fix the problem. Now they cant take the ecm back because it was flashed LOL. This is a joke. If anyone has ANY ideas please let me know. Im about to take it out and drive it off a cliff!!! just kidding.

 

[CAPTPHIL]

JCurry,
As I said in previous post, I have only used Authorized Cummins Dealers. When they installed new ECM 3 yrs. ago, they used a laptop to program the ECM after they installed it on the motor. The new ECM was not pre programed. They entered the motor serial# into the laptop and it programed the ECM. I watched the entire process. At that time the computer program in their lap top cost several thousand dollars. A lot of Dodge and independent shops will not invest this kind of money for occasional repairs. IMO we are wasting our time and money going to Dodge for anything but warranty. Check with Cummins and they will give you the nearest Cummins shop. I have over one million miles exp. with 24v for the last 13yr. and a high dollar education.
Good Luck Capt Phil

 

[MAV1]

JCurry,

As I understand it the ECM has nothing to do with idling or idle quality of the engine, it's all in the fuel pump control module of the VP44. There are 2 means to test it, one is a VP44 stand alone tester, made by Cummins, it plugs into the back of the VP44 in place of the factory wire loom. If the truck starts and idles, and RPM ramps up when the test switch is flipped on the tester, odds are the VP44 is ok. The second to perform the same thing, which does not include RPM ramp up, is to hot wire the VP44 as described on Bluechip diesels website.

In the information column, I have been chasing a similar problem for the past 3 years. The problem was determined to be pin #3 on the male plug of the APPS sensor, it had a film or something on it, causing intermittent signals to the ECM. The senior technician at my local Dodge dealer found it when he installed a DRBIII scanner, with scope attachment (at my request, Thanks Chip) to the associated wire (light blue w/black tracer), and watched the signal, idling and underway. The signal had considerable noise in it. Manually cleaning the pins in the male APPS sensor cured/solved the bad signal, end of problem. I'm not saying it's what's causing your problem, but it's worth looking into. As a side note, I will tell you I had removed that plug and cleaned it and it's female plug with aerosol contacts cleaner. Didn't do the job. Good luck, Maverick

 

[MAV1]

The missing and code you describe is characteristic of a wrong or incorrectly installed key on the VP44 shaft, where it slides into the injection pump gear inside the gear housing. You might be able to check it by removing the crankcase breather on the front of the engine, and examining the key way and the key. You can bar the engine by turning the alternator with a socket to turn into view. Get a really good light and a mechanics mirror. http://www.bluechipdiesel.com/BLUE_CHIP_VP_44_INSTALLWO_CORE_INFO_2010.pdf

Hope this helps, MAV1

 

[hcole]

The missing and code you describe is characteristic of a wrong or incorrectly installed key on the VP44 shaft, where it slides into the injection pump gear inside the gear housing. You might be able to check it by removing the crankcase breather on the front of the engine, and examining the key way and the key. You can bar the engine by turning the alternator with a socket to turn into view. Get a really good light and a mechanics mirror. http://www.bluechipdiesel.com/BLUE_CHIP_VP_44_INSTALLWO_CORE_INFO_2010.pdf



Hope this helps, MAV1

Mav1, based on what you just said and the fact that he's had other VP44s on the truck with the same problem, maybe he needs to check the key way on the pump gear that is turning the VP44. It could be wallowed out or worn giving the same effect as a misaligned key. I guess you'd have to take the front cover off the engine to check it though.

 

[Sampson01]

Help

Been having problems with my truck throwing the 1690 code and missing at idle. I took it to a shop and they told me i had a bad ecm. So i got a computer from Auto Computer Exchange. Disconnected batteries for 2 hours, took old ecm out put new one in. Cleared the codes with my scanner, started it up, same problem. 1690 Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor comes up 5 min after its running. So i take it back to the shop, he calls me the next day, says its my VP44.

So... ... . Ordered VP44 from Gus @ Farmboys, got it in this mornin, put it in when i got off work and it ran fine for 15 min. Started driving it around, Fuel Injection Pump CKP Sensor Does Not Agree With ECM CKP Sensor AGAIN!!! Truck misses at idle just like it did before the 2 cam sensors, timbos apps sensor, (tried working stock one too), ECM and VP44. Truck runs fine above 1500 rpm and sometimes will idle fine for 5 min before missing again. Anyone have any other ideas? Im gonna take it back to the shop tomorrow but was hoping someone had some other ideas. THANKS!!!!

Ever figure out this problem? I have the same problem throwing same code. I've swapped map, apps, ECM, injection pump, alternator, whole engine wiring harness. Also put new cam position sensor in. Nothing has changed. Misses bad at idle, throws a p1693,p1690 and every now and then it rev on its own at an idle like im blipping the throttle with my foot.