05 24v rebuilt motor stumble???

[Kbarth]

2005 ram 3500 24v trouble: I bought this truck in Utah and drove it back to californian 2 years ago. On the way back the truck ran ok but at the refuel point i saw that i had a serious issue with blow by, i lost about a gallon of oil. i limped it home and began the rebuild process. The engine bay and bottom of the truck was coated in oil. Began the breakdown only to identify this is not the original motor and they were crap mechanics and didi a rough job. I had a completet rebuild with new head and cam, I have rebuilt the turbo and installed new aftermerket stock injectors 2 new batteries. The truck runs very rough and blows lots of white smoke with nocking noise and unburned fuel. I have cleaned the harness connectors and used dielectric grease. We inspected the ohm resistance on the injectors and had a uniform 0.1-0.3 ohm reads. we also checked the loom from the injector to the connector outside the valve cover all 0.2-0.1 ohm. HELP still running with a miss?? new to cummins running out of ideas??

 

[petersonj]

The knocking noise and unburned fuel sounds like it could be an injector leaking. If you can get your hands on an injector block-off tool (which is nothing more than an injector line cap), then you can remove one injector line at a time using the block-off tool to cap the rail.

Start the engine each time until the offending injector is disabled. You will know when that happens because at that point the engine will run smoothly (for a 5 cylinder engine, anyway) and the detonation and unburned fuel will disappear.

If you don't have access to test equipment, this is an inexpensive way to diagnose a leaking injector.

The following link will show you a block-off tool.

https://www.accuratediesel.com/shop...MIlsj4usrf4AIVBbjACh3_jABoEAQYAiABEgIhRfD_BwE

- John

 

[DonFitzwater]

Garbage injectors most likely. Where did you get them?

 

[Kbarth]

blocked off each injector one at a time with block off and had no change other than expected miss on disabled injector and still bad white smoke. I got the injectors off parts geek

 

[DavidC]

I am by no means an injector expert but I would think of pulling all of them and have them tested. Could be more than one giving you problems.

 

[Kbarth]

im putting the old injectors back in to check since it ran smooth before the tear down. Is there any way to check fresh injectors before they get installed?

 

[DonFitzwater]

im putting the old injectors back in to check since it ran smooth before the tear down. Is there any way to check fresh injectors before they get installed?

I’m not trying to be a smart mouth........yes, don’t buy from partsgeek. ONLY get injectors from a Bosch dealer. I went through what you are going through last year and it sucked. Cheap injectors will ruin your life!

 

[Ozymandias]

And might there is a tune on the ECM as well?

Do we KNOW or do we ASSUME that this engine was bone stock when you bought it?

If i read blow by my alarm went on.

 

[Kbarth]

i bought the truck as stock but have not sure what it was running beforei got it is there a way to check the ECM for tunes?

 

[cerberusiam]

Is there any way to check fresh injectors before they get installed?

Yes, buy NEW injectors and verify that is what you got. Knock and white smoke is a bad injector, it is hanging and not mechanically functioning correctly.

The reason you had to rebuild was probably bad injectors and\or an oiled air filter.

 

[Kbarth]

I put the old injectors in and found the same problem. The old injectors before i pulle dthe motor ran pretty smooth and produced no smoke now they smoke the same as the newer purchased injectors??? Two different sets of injectors with the same results??? Is it possible that the new head is missing a plug that could allow the excess fuel inside the cyinder since it had uniform results with the injector block off tube?

 

[cerberusiam]

Did you have the head checked to make sure it wasn't cracked, and, are you sure the white smoke is not oil form the turbo?

 

[Kbarth]

No I have not checked the head, I had the Long block done at the machine shop locally and they put on the wrong head the first time around, Aparently there’s two version heads on the 5.9 in 2005.After I began to bolt on the additional parts as I was installing the injectors I found that the tubes would not fit into the head. I then took it back and they identified it was the wrong head and then I had to switch the head and re-assembled.

 

[Ozymandias]

i bought the truck as stock but have not sure what it was running beforei got it is there a way to check the ECM for tunes?

I dont think so, gueß you should find one with a Smarty in your area that is willing to download you the most up to date software version.

 

[sag2]

White smoke is unburned fuel. Can you get a compression tester? On a new engine you should see at least 400 psi.

 

[Kbarth]

we are also wondering if the cam may not be timed correctly?

 

[Kbarth]

I did the compression test and found the first five cylinders at 3:40 to 345 in the last one at 350 psi. At this point I put the old injectors in and I have the new injector sent back to the shop to have the mapped but both sets of injectors still do the same white smoke in the shop is claiming that the wiring was wrong on injectors one and three and That number five was on all the time so they’re telling me the computer is wrong because when they changed injectors one and three the motor smooth out but still produces white smoke I did do the block off on all the cylinders and they all produce the same white smoke so I know the shop is covering their butt that number five was on all the time so they’re telling me the computer is bad. They are now saying that the old injectors and the new ones that I’m having that must be bad and would like me to know by a new set of injectors and possibly a computer. They are just now doing the compression test possibly today but I still don’t believe they’re going to stand behind there work.

 

[EricViviano]

they put on the wrong head the first time around, Aparently there’s two version heads on the 5.9 in 2005

Common rail 5.9 heads are all the same

This shop your using, I would run away fast after reading your whole post.

 

[Kbarth]

update: still have problem and running out of ideas. Since the last post I took the truck back to the machine shop questioning there work. they had the truck for a week and checked the injectors and found that the #1+5 injectors begin to cycle as soon as the ignition is on which implies that they are dumping fuel non stop, which would explain why the block off of each injector showed little results. They also changed the 1,5 injectors with good ones and the problem continued. They believed the ECU is bad at this point. In addition they did prove to me the motor had good compression at 550 psi using there tester and then my tester because i thought the rebuild might be bad. That was actually a big relief. So i bought a rebuilt ECU from flagship for 900 which was a plug and play and found that nothing changed from the old to the new ECU. I have now began to ohm out the entire harness from the injector to the ECU and have found nothing on the 12 wires associated with the injectors, I have also changed the map sensor and am still just as puzzled as when i started. Keep in mind i still have no codes but the truck billows unburned white diesel out the exhaust. HELP??? I am now 20k into a truck i cant drive...

 

[sag2]

550 sounds awfully high. It should be in the low 400's. Also the pistons and injectors changed in 04.5, so are you sure you have the correct parts in it? As far as an injector sticking open or the ECM holding it open, when you cap off an injector it is impossible for it to get fuel. So if it still has white smoke all the other injectors are leaking or still have incomplete combustion. Does it only smoke cold, or all the time?