For the last 200 miles, I have been noticing a rattle coming from my passenger side of my engine bay. It has been getting worse too. It occurs at part throttle and above 2750 rpm. Does not occur in full throttle (according to my hearing but other sounds may be covering it up). It is a ticking sounds that varies with RPM (higher RPM means faster ticking). It is not the HPFP but is a similar sound. To me, it sounds like valvetrain (stuck lifter?) or possibly a belt or belt tensioner that isn't happy. I will try to get some sound recordings tonight to post once I can find someone to operate the throttle pedal. I should mention that I just put in a Steeda passenger side motor mount 500 miles ago, but I have checked that everything is still tight from that.