That’s common on zeds I had the same problem on my zed as well so I have added 0.5% on cylinders 2,4 and 6 and that fixed the problem on low vacuum and cruising areas but lambda 2 still a bit leaner on high loads.
I’m looking to wiring my spartan2 wideband sensors on my 350z and I need switched 12v can I use Aux7 (O2 heater LF) and how should I set it up?
Thanks in advance.