bdaniel

I have a 2007 2500 5.9 with no mods and 64,000 miles. I have never had a single problem. This weekend. I get a check engine light and rough idling for about 15 seconds and then everything was normal again. Turning the key on and off 3 times did not display the code.

I went to Auto Zone and they pulled P2149 which indicates a wiring problem to cylinders 4-5-6 or an injector problem in 4-5-6. The engine light has since gone out but the code is still there. I purchased a code reader.

Even with the engine still under warranty the dealer will charge me diagnostic fees to check out the code unless they find a hard fault someplace.

So.... if the engine is running fine now, what could have caused the problem? The wiring looks fine. Could something have gone through the injector? Could a small amount of water have gotten through the filters?

Any advice from anyone? I am towing a 5th wheel on a 3,000 mile trip in two weeks and don't want a break down in the back woods someplace.

Thanks,
Bobby

BigDiesels

I had a similar problem on my 06, except it was in the front set of cylinders. Same thing, ran really bad, low power, check engine, etc. I shut down and checked codes, re-started and the problem cleared up. I cleared the codes and ran for another month or so (3-4000 miles) and then it hit hard... #2 injector solenoid failed. I bet if you pull the valve cover, you can find the bad one. Pull both wires off each injector and check resistance. It should be around 0.5 ohms. If one is higher (above 1 ohm) that will be your problem. The other thing to do is to check continuity from each injector lead to the pins on the outside of the gasket. If a wire is broken, that will cause your code as well. Total troubleshooting time for both these procedures should be about an hour. If the gasket is good, it can be re-used.

Colo~Dirtbikers

Do you check the ohms on injectors with key on, or engine running? Mifgt be a bit messy with engine running though.

I think I'll check mine. They are about wore out.

Carey

BigDiesels

Batteries disconnected. With 305k on your truck, I don't think your injectors owe you anything (if they're original). When I was talking to Rip at Source Automotive about getting mine in to Don M, he said that the average they see is 150,000 miles on the HPCR injectors. That is exactly where mine were. Turns out I needed the solenoid on 1, rebuild kits on 4, and 2 were good. I also got the flux 1 nozzles installed. I only have stock filtration, fwiw.

bdaniel

Thanks guys. Checking the resistance sounds easy. Two questions.

Will the gasket be reusable?
What are the torque values on the valve cover bolts?

Thanks,
Bobby

pwknapp

Mine had PO 2146 front bank on 2 different occasions. Dealer replaced all six injectors and the wiring harness. Same thing happened on 07 company truck and it got 6 new ones. 68k on one and 93k on hte other, oh yeah different fuel sources for both trucks.

BigDiesels

bdaniel, check continuity from each wire end to it's respective pin on the connector, and check the physical condition of the gasket. If it checks OK, you can re-use it. I bought a new one (before I verified that it was OK, and it cost about $150 CDN from Cummins (p/n 5264950, but the parts guy will probably want your engine s/n to make sure...)

As for the bolt torque, work from the center out, torquing to 18 ft-lbs.

Colo~Dirtbikers

I have 341k now. All original except one that I replaced at 295k because of an electrical failure in the injector. I now have one causing some smoke on start up and it smells rich. Im just talking a puff or two, but I feel they have done there job.. Gonna be putting a set in from a crashed 2005 with less than 1000 miles on em here this week. Going to test em with the ohm meter before putting them in just for fun.

With 341k my truck still runs great and gets me pretty good mpgs considering my dually weighs 10000 lbs empty and I gross 23-24k often.

Thanks!
Carey

Topper

I have had the same problem 4 times! Injectors twice and 2 valve cover gaskets.
Good luck.
Topper

dieselfreak21

Likely the injectors are failing. I had that code until they where rebuilt. Always thought it was my TST but started comming on about 80k and by 150k they needed rebuilt. Dealers are known to put in used injectors that tested ok back at chrysler if they failed shut down test and such at the dealers so be ware of those imho. DonM or Industrial Injection can fix or rebuild if not to far gone. The ULSD and more moisture in fuel and lack of 2 micron filter will eat them up.

bdaniel

I removed the valve cover and disconnected the two wiring harnesses.
I used an ohm meter and checked the resistance on each injector at the wiring lugs on the injector. I did not have to remove the wires from the injector because I disconnected the wiring harness.

Number 5 read 0.9-1.0 ohms, the others read 0.6-0.7 ohms.

So number 5 is different. Is this enough difference to indicate a problem to the dealer? The other 5 were identical. My meter flipped between 0.6 and 0.7 identically for those 5.

The odd injector flipped between 0.9 and 1.0

Here is a photo of what it looks like under the valve cover for any one that is interested.

Thanks for all the help.

Bobby

BigDiesels

My guess is that #5 will let you down soon. I just got all mine back in with the Flux 1 nozzles. I think I can tell the 2 that didn't get rebuilt because they were "in spec".

All in all, not a bad job if you take your time. #6 is a B#$%& to get at.

If you can spare the truck for a couple weeks, now would be the time to do it, before it leaves you on the side of the road.

bdaniel

My dealer just told me the resistance difference was not enough to change the injector under warranty. He said he needed a hard fault. The engine needed to be running rough with the check engine light on.

But he did tell me that the Cummins 100,000 warranty would cover towing to the nearest Dodge dealer. Can anyone confirm that? I plan to call their 1-800 number.

Thanks

tallboy

Mine went at 96,000 miles (just in time!). I bought a valve cover gasket and it ran better for a day, then crapped out same codes. Mechanic replaced #5 injector. I think it was $800 installed. Chrystler honored the repair for the 100K warranty and eventually (2 months) sent me a check for the injector job, not the valve cover though so I was out $400? can't remember.

kopterdoctor

My truck has had the same issue. The front three injectors failed with the #1 injector showing a short. The dealer says the ECM is bad. I think they are smoking crack. I will get a new ECM in a few days. I guess I will have to wait for it to fail again and then hope they fix it.