Crossover off, and yes, that bolt.
Sprayed a steady continuous stream of starting fluid at the EGR valve, under the solenoid, where the two nuts attach it to the exhaust...
And the idle died down then picked up. Kept doing that while I sprayed there.
Getting a multimeter to check out the solenoid tonight.
But, I may have narrowed down my code, ya think?
there'* a ground, passenger side, right above the battery. When I disconnected it to check it, there was an audible clicking/almost a fart(really no other way to explain it, sorry!) type noise coming from the EGR side of engine.