New liftersI do think a vac leak is worth checking for.
I'm just guessing they did plugs and wires when they replaced the lifters?
new plug wires
new plugs -twice
that includes a new intake gasket twice
new head gaskets, heads inspected and cleaned by a machine shop (pass)
new cat on bank2
new downstream 02 sensors
new maf
swapped in known good map
as a result the rotational noise I was hearing on bank 1 is gone
previous to doing bank 2 lifters I was getting a lean code on bank2 which has not yet returned but it doesn't have many miles on it since then probably less than 30
still getting random misfires, maf code, maf code is new since bank2 lifters done
swapped the tune 3 times
thats all I think