So i got the running bad part fixed, end up being a vac hose and both O2 sensors bad along with a sticky secondary...runs pretty good. The other problem it had that didn't bring up until end of my last Frustrated thread, is the noise it makes under any type of engine load, not bad at idle to rev, hardly there yet still is, but loud when when putting it under a load accelerating. It sounds exactly like an older hydraulic lift engine when one of the lifters has collapsed or is noisy. Using a stethoscope, I've narrowed it to being the loudest when I put the stethoscope on the intake manifold bolt that is the 2nd one in from the driver's side on the front of the manifold. That's where it's the loudest. Fair noise coming from manifold to head bolt just under the throttle body. And some is heard in fuel rail right near that 2nd manifold bolt in. Stethoscope to galley area, barely audible, same as valve covers, block, tranny case, oil pan , all of which can't hear it or barely hear it. I replaced rear cam tensioner, checked valve lash, all were good, didn't pull shims cause no tools, visually checked what you can see of the valve springs. All that and still the noise. Have 22hg vac at idle, 60psi cold, 20psi hot idle oil pressures, 35 fuel pressure. I'm out of ideas... maybe I missed something or forgot something.... Any ideas/help?