Check out my datalogs and see if you can see.....

[Axix23]

could your primary o2 sensor being faulty at times cause you to run leaner than usual at certain times?? I always thought if your primary o2 went bad, at that exact time, the ecu will read from your exsisting map inside your ecu and just run from the fuel tables?? Correct me if I am wrong.... Trying to diagnoise why I run leaner than usual(2-3 times every 2 months)and cut out at a stop sign and then car runs perfectly fine afterwards.. Here is a hondata kpro datalog... I have been tuned by a local tuner... And I have checked everything, can't come up with anything.. No vaccum leaks, faulty sensors, or etc...