[lev16gt]

Anyone have tips on wiring a wideband o2 sensor to only be powered on when the engine is running (e.g., in tandem with the fuel pump), instead of being powered with ignition on? The generic recommendation is to “power it from the fuel pump relay,” but with the wiring of the relay being unlike most vehicles and the safety cutoff from the air metering plate brown/black wire, I’m unsure how exactly to wire the o2 sensor to come on with the fuel pump. Is it as simple as running the o2 power wire with an inline fuse to the black wire coming from terminal 30 of the fuel pump relay (the wire that goes to the fuel pump) or directly to terminal 30 of the relay? Or do I need to use a separate relay for the o2 sensor and use the fuel pump wire to switch the relay on? Is there anywhere in the engine bay to tap into for power only when the engine is running?... possibly a way to use the brown/black wire from the safety cutoff?

Surely someone has their o2 powered to be on only with the engine running, as that seems to be the widely accepted install method to ensure a long sensor life (i.e., sensor heats up as the engine heats up).

I'm likely overthinking this... any help would be greatly appreciated!

Specs:
1976 911s 2.7
EFI conversion (all CIS parts removed, wiring still present)
Megasquirt 2 ecu running MS2extra
14point7 Spartan Lite v2 wideband controller w/Bosch LSU 4.9 sensor