Truck has a very unusual noise, when in park it seems like something is broken inside the motor, idles a little rough, at first with the Smarty, my thought is the timing when I put into drive seems to go away, the truck runs great, no oil usage to speak of, boost is good, oil psi is good.
Checked engine compartment nothing seems loose or hanging down.
Smarty hi-idle has been installed, during warm up would seem to get high idle then a bang of some kind.
Thoughts??