Quote:
Originally Posted by jpnovak
Are the O2 sensors and controllers powered and grounded to the exact same spots? If not, minor changes in ground resistance can cause enough voltage shift to read differently on the sensor output.
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The two sensors are powered and grounded identically. I have a single switched power lead feeding both units (through separate fuses before the units) and the two grounds from the controllers combining to a single feed to the same ground point.