[nyg56nyy2]

Hey- i know this subject has prob. been beat to death but anyone with some insight might help!

2006 5.9l 4*4, 50000 k mi, megacab, stock except for smarty jr. and banks exhaust break.

The truck runs great, starts perfect, doesn't smoke. however, i get this rattle @ 1200-1800 rpm, sounds like the famous injector rattle that is well documented on these trucks. when i get on it the rattle is gone. its very anyoing.

What i have tried: i always use a fuel additive every fill up, used to use diesel kleen, started using Howes lubricator- no difference. recently, started using 1/2 oz / gallon of 2 stroke ashless outboard oil. No difference.

I played with diff. settings on the smarty, when in SW3 tm4 tq 2 rattle was worse. (i know the timing was too advanced) set it to sw3 tm 3 tq 2 a little better. I even went back to the stock program and the rattle was more noticable. Currently my setting is SW3 tq2 tm3.

I feel that in the summer i didn't have this problem or it was a heck of alot better, does it have something to do with winter mix? i have tried different fuel stations to no avail. This is my first Cummins and my first year owning it.

Is this a situation where i need to turn the radio up? Any suggestions would be great!

 

[itr.#1446]

I was about to make a post I'm having the same issue on my 05. I just was revving it neutral up to about 2k rpms and once I got past about 1600 it sounded like a v8 with a bad rocker. Got me real nervous. I think from what I've been searching my injectors are on the way out I get alittle smoke on start up, fuel mileage seems down and also power too. Hope some experts can chime in and def diagnose that it's def the injectors making the noise.

Also I'm running smarty on 5 default settings, have used diesel Kleenex in the last tank and am running biocide in this tank since my truck sat for alittle less then a year. I'm at 62k miles on the odometer

 

[jrgough]

I'm having the same issues when your driving regular is more noticable but when you get on it it smoothes out and quites off. I have also noticed when i'm running the Smarty Jr that i hear a ticking sound coming from the CP3 area of the truck, it's most noticable when your accelerating.