I hear a knocking noise under the hood when I am coasting to a stop. Once i am completely stopped the noise stops and it doesnt do it in idle. I know it is not a noise from the drivetrain so we can rule that out. I do know that my injection pump is bad and I am waiting anxiously to get my new pump installed. (my truck only made 17,000 PSI on a race tune with and airdog 150) If anyone has any thoughts as to what the noise might be. I feel like it is the CP3 but any help would be appreciated.