Hello, so I have an issue with my 2006 g35 coupe where it runs completely fine during open loop not reading off 02 sensors but as soon as it goes into closed loop and starts reading 02 data the air fuel ratio will go up to 18s at idle and it will start Misfiring with a random misfire code. No other codes just the misfire code and after doing that for a bit will drop the afr super low run somewhat okay for a couple seconds then go back up and start missing again. When the 02 fuse is pulled it runs completely fine.
Ive replaced both upstream and down stream 02 sensors, mass airflow, and don’t have any exhaust leaks and I don’t have vaccum leaks as far as I can tell. Just wondering if anyone has run into this problem and if anyone had any suggestions on what it could be?