Low 5v ref

[Yukonjay]

Hey there mr fixkick

    Thanks for all the info. Couple more quick ones before I fire this pup up again. The mafs got 12v to it So it’s def bad. Ok....

1-can I wire the sensor ground straight to the battery?

2- can I run the car without the ect maf and o2sensors?... I Caint find anything wrong with any of them or the wiring. 

      Also if I can run without all the sensors in that 5v ref circuit thought I would wire the grey yellow ground separate- straight from ecu to tps to make sure it wasn’t picking any vol anywhere. That way would be eliminating anything but the tps wiring??

        Thanks for your help!!