So over the last couple days i have noticed a strange ticking noise. I can hear it outside of the truck at an idle and in the cab at about 2k rpms. The speed of the sound increases with the rpm. I thought it might be injectors, but i checked my balance rates and i am within +-2 on all of them. Could i be hearing a wash in the CP3 pump?? Even with the airdog, i still get a low FRP code at WOT. The airdog is set at what it came preset as, fuel pressure gauge is being ordered. The truck is in my signature, the PPE tuner is set at level 4. Any ideas or things to check would be greatly appreciated.