Ideas:I’m taking the night off, I ordered an NGK coil from rock auto to rotate through and see if the weak coil theory is even possible. If not, mine all have 230k so I’m sure I’ll need it soon enough anyway. I’ll order an OEM Acura rear mount after I try the coil. Chris looked at the tensioner pulley bouncing and said that normally that means something is going on with the motor, I will double check my pulleys again but I used a Gates tensioner assembly, a NAPA reman power steering pulley, an Aisin water pump, and right before I bought it the AC compressor and alternator were replaced, remans I’m sure. I want to take the belt off and run it and see how the vibration is with no accessory pulleys loaded on the motor. I’ll probably do those two lower tranny/cradle mounts since I have those too now. But to put your hand on the valve cover you feel what feels like a consistent super light miss of some kind. I know I have good compression but I’m wondering if something could be going on with the valvetrain? The valve adjustment changed nothing but it did rule that out, I hope. Oh yes and I’m learning some more about wave forms on scan tools, watching live data im seeing my long and short term fuel trim want to run at about +4% but I don’t know enough about that to know if that’s indication something is suspect or not.
Running lean - could be fuel pressure regulator / fuel filter / fuel pump, dirty, bad injector(s), dirty MAF
Are the belt tensioner markings within the nominal range? Yeah, remove the belt and see if that helps.
Crank Angle Sensor.
When you replace the rear and bottom mounts, make sure to completely disassemble the mount beneath the battery. It won't allow you to jack the tranny up high enough to insert the tranny mounts.