Hi all, Its been a while since I've posted here - But I need your guys help. This issue drives me crazy. My G35 Coupe has this rough idle going on since March, where the exhaust sounds like its sputtering. If I give it gas in park, it will also do this sputtering as well. However, when I am driving it, it is not noticeable. The exhaust smells a little rich, and it is throwing a pending P0306 (6th cylinder Misfire) code. The issue disappeared for a day when I did the oil change, and also goes away if I take it for a spirited drive. I have replaced: - EVAP Canister Purge Valve - Rocker covers on both sides - Ignition Coil - Spark Plug - PCV Valve I have also ensured all vacuum hoses are on properly and that there are no intake issues. I cleaned the throttle body and did an idle relearn as well. I have attached a diagnostic report from an OBD software to this post. Below are the videos I took, one from the engine bay (by Cyl 6) and one from underneath the car, under the rear muffler: Any ideas on what the issue might be?