I have a knock that will not go away, ive tried everything i could think of. it is not timing rattle as i know what that sounds like. I have sent my injectors back to don and nothing was with them. i have taken all of my boxes and downloaders off and it still knocks. i have adjusted my valves and it still knocks. when idling there is no knock, it only knocks when im driving. i have tried a different relief valve and no luck, and also a new FCA and no luck. Its nothing with head gasket bc i sent an oil analysis in. where do i go next? thanks guys

 

there is a fix something about moving the cp3 pump backwards counter clock wise 30 degs. see if it goes away mine did but I think they had to go more then 30 degs on my truck. But my noise was at idle not driving. Hope this helps you.

 

thats a scary thought hopefully it is a cp3 issue not in the engine internally

 

well mine is only when driving. not at idle. All of my oil analysis have the test materials under the average, so i would not think it is something internally or i would see a higher number for one of the metals i would think. what else?

 

is a cp3 a possibility? i have a rail gauge i have seen my idle pressure vary from 7.5 to 5 to between 3 and 5 X 1000 PSI

 

cp3 could definately be it,I had one that sounded like injector knock,replaced the cp3 due to a rail press. issue and now the knock is gone

 

thats a topic that makes me wanna

 

john at floor it will be hearing from me today

 

swapped cp3's for a stage 2 and no more knock. john at floor it is an awesome guy to deal with. he was up late talkin to me on the phone helping me put it back. couldnt ask for better tech support. Thanks john!