[baumbr]

Thanks for the guidance WisWind.

While I was in there I replaced all the plugs with Autolite double platinums. The old plugs were sooty and the center electrodes were burned way down. With the upper intake off all the plugs can be reached from the top, although the back side requires some strange yoga positions.

Hooked a vacuum tester to the IMRs and each pulled fully closed at 8 inches Hg without any hint of bleed down, so I think the diaphrams are good. (This was the only P code that came up when the transmission went down.)

Replaced the PCV and the short piece of soft hose that connects it with the hard vacuum line. The original had collapsed and pinched shut. I'll double check the elbows, tees, etc. along the way.

Also cleaned the throttle body with a specially formulated and lubricated cleaner. (I accidently stuck my greasy thumb inside it.) Injectors were cleaned with carb/intake cleaner and stethescope tested after reinstallation. all good.

Next, vacuum and electrical testing of EGR valve, EGR controller, DPFE, TPS and other controls to resolve the drivability problem. Also new plug wires