Idle comes up like its supposed to and when its on the way down it goes to die and starts missing really bad. Has new spark plugs, wires, iac on it. Tps voltages are fine. It pops a system to lean bank one sensor one and a miss fire code. But you can shut it off and start it back up and it will run perfectly fine; check engine light will go off on its own and everything. Run fine all day, then next cold morning it will do it again. This thing is driving me wacko if anyone has any idea at all on what it could be let me know. Thanks.

Charlie