The FICM can cause issues only when hot, so don't underestimate the helpfulness of testing w/ a known good one. Sometimes electronic components just act that way.
An air test when hot should probably be high on your list.
Unplugging the ICP sensor only helps when you have a bad ICP sensor. From the voltage you posted, the ICP sensor looks ok.
An air test when hot should probably be high on your list.
Unplugging the ICP sensor only helps when you have a bad ICP sensor. From the voltage you posted, the ICP sensor looks ok.