Dodge Cummins Diesel Forum - View Single Post

synister · 07-09-2007, 07:54 PM

i have a 2006 cummins, i had a injector go bad, i sent the injectors, and injector pump out to be tested and modified.

now i have stage 3 injectors a stage 1 cp3 pump and a new knock!!!

my knock sounds and acts just like the one described here. mine knocks under very light throttle/load and i hear a slight metallic rattle which i was told was common on '06 common rail engines because of the Y on the valve train. i have adjusted the valves 3 times and made them a little tighter on the the last adjustment, still no change!

the trucks runs very well, fuel economy is 17 to 18 in traffic and 21 on the highway at 80mph it is a mega cab dually at that!

the power is very good, i roll into it once it shifts into second and can hear the rear tires spin!

i have other mods, but my concern was when the injector went bad i had dump a lot of diesel in the engine oil, though i did not run it hard at this time and the knock was not there until after i but the truck back together with the moded injectors and cp3.

no hard starts, no oil loss, my conclusion was the cp3 due to the stage 1 mod?

any thoughts???

Last edited by synister : 07-09-2007 at 07:57 PM.

07-09-2007, 07:54 PM	#15 (permalink)
synister Cummins Fan Join Date: Jun 2007 Posts: 30 Thanks: 0 Thanked 0 Times in 0 Posts synister's Truck Pics	i have a 2006 cummins, i had a injector go bad, i sent the injectors, and injector pump out to be tested and modified. now i have stage 3 injectors a stage 1 cp3 pump and a new knock!!! my knock sounds and acts just like the one described here. mine knocks under very light throttle/load and i hear a slight metallic rattle which i was told was common on '06 common rail engines because of the Y on the valve train. i have adjusted the valves 3 times and made them a little tighter on the the last adjustment, still no change! the trucks runs very well, fuel economy is 17 to 18 in traffic and 21 on the highway at 80mph it is a mega cab dually at that! the power is very good, i roll into it once it shifts into second and can hear the rear tires spin! i have other mods, but my concern was when the injector went bad i had dump a lot of diesel in the engine oil, though i did not run it hard at this time and the knock was not there until after i but the truck back together with the moded injectors and cp3. no hard starts, no oil loss, my conclusion was the cp3 due to the stage 1 mod? any thoughts??? Last edited by synister : 07-09-2007 at 07:57 PM.