Originally Posted by markeddy
Yes, I am fulfilling my inner ricer, so who really cares. Why would vampire tapping the wire going into the ECU harness load the circuit and cause issues, that would be my only question left.
Also, I have a 2007 STi Limited, not sure if this makes any difference.
o2 sensors work by changing the resistance of the circuit. if you add another device, you change the resistance externally.