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Wiring o2 Sensor to be Powered Only with Engine On
Why do you want it only powered when the fuel pump is running? The sensor needs to be heated in order to operate properly and powering it with the car on allows for that.
FWIW, Here’s the wiring I had with ms2, the o2 sensor is powered from a fuse panel that powered all the efi when the car is on.
https://www.dropbox.com/scl/fi/vx8hdsgr86ypmp3z6vrhi/EFI-Wiring.pdf?rlkey=j3yhdebhvwm387jron5zdfoxc&st=rjfkhvnc&dl=0
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-Julian
1977 911 S: Backdate, EFI/ITB, AC project in the works:
http://forums.pelicanparts.com/porsche-911-technical-forum/1106768-when-well-enough-cant-left-alone-backdate-efi-itb-ac-more.html
Last edited by Showdown; 08-08-2025 at 05:08 AM..
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