So, I hooked up my replacement EFIE, green to a NEW Bosch O2 Sensor, white to Computer, red to power wire (o2 heater wire, measures 13.3V when running), and black to body.
With the engine off, (key in ON position), I set the range to .300V, and the voltage to .200V, everything stays steady.
I have a voltmeter hooked up to the white/green wires so I can monitor the setting while driving.
When I start the engine, the voltage will climb to a point in the first few seconds (around .060V) then drop back down for a bit (.020V or less), and a few minutes later will start climbing again. When driving around 60mph, the EFIE output is around .100V, and will fluctuate a bit if I accelerate/decelerate. When in stop/go city driving, the voltage climbs when I stop (to around .170V) and drops while accelerating to somewhere around .100V -.130V.
Has anybody else monitored their EFIE readings while driving? I hear it is supposed to remain constant. I tried hooking the red wire to another power source (switched HHO power wire from battery) and it still fluctuates.
When I measure the O2 sensor signal (green wire and ground) I get the fluctuating readings from .0 to .7V as expected.
Just curious if anyone else reads the EFIE voltage while driving, and what they experience.