Dodge Cummins Diesel Forum

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-   4th Gen Powertrain (https://www.cumminsforum.com/forum/4th-gen-powertrain/)
-   -   "Injection rattle"? at idle (https://www.cumminsforum.com/forum/4th-gen-powertrain/825361-injection-rattle-idle.html)

jlebrun_05 12-12-2013 11:35 PM

"Injection rattle"? at idle
 
Been getting a very intermittent rattle when idle, that seems to be getting more frequent or noticible lately, but it has also been between -20*f and 5* for the past few days, not sure if that makes any difference. Idle rail ksi is about 4.1-4.3, with some spikes randomly to 5.5ksi or so, then back down to 4.1-4.3. I also uninstalled my MCC tune and went back to the box tune (6.8.39 i believe), and still have the same rattle. If I high idle, it disappears. Also, still has good performance and havent noticed any other issues besides the sound. Its been suggested that I may have an injector going out and should take it in for an injector kill test. Any other ideas or what this may be? I currently have about 46,xxx miles on it, been deleted since 5,000 roughly, running 50/50 fuel with howes if that makes a difference. I will try to attach a couple of videos of the sound from photobucket.

http://i251.photobucket.com/albums/g...psc99c6c40.jpg

http://i251.photobucket.com/albums/g...ps8fefe1a4.jpg

timb320 12-12-2013 11:59 PM

It definitely sounds like one injector sticking, I assume you are talking about the occasional tick. Wonder of some Diesel injector cleaner would help?

jlebrun_05 12-13-2013 12:06 AM

yes, every once in a while it makes a tick or rattle for just a second

N of 60 12-13-2013 03:24 AM

What is 50/50 fuel?

jlebrun_05 12-13-2013 10:08 AM

50% #1, 50% #2

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