Can someone explain the cause of this? Frames 2900-2950 left bank O2 sensor spikes down several times and AFRs go up. I'm thinking it might be an exhaust leak near the sensor. Sounds like I have a small leak, but it is 18" downstream from the O2 sensor. Tune and log attached. Thanks.
8-2 noon.hpl
7-30 1.75bar zone unchecked n-a.hpt