BlackRx7

I just installed my air/fuel gauge, though I wire the power through my stero, so when I turn it on it gives a lesser reading, its a autometer phantom guage, also where should my Idle be at, ect?

Scott 89t2

if your airpump is in and working your idle should be full lean. if no airpump it'll be half way between middle and rich.

BlackRx7

anthor question, if I plug in my FCD, will it still tell me the correct a/f ratio?

RETed

FCD does not affect AFR readings.



-Ted

bob13bt

iTrader: (9)

Just as a reference point, where should the bars be at under WOT...

Mostly Green (rich) or some Yellow (stoich)?

RETed

That's the problem, we can't give you one.
The O2 sensor output is too dependent on O2 sensor temps, and it can be off by as much as one or TWO bars, depending on how the AFR gauge is built, designed, and calibrated.



-Ted

BlackRx7

I also notice when I turn on my lights, it goes down like 2 bars....whats the best power source to hook it up to

RETed

The O2 sensor generates it's own voltage - the O2 sensor uses no external power source.&nbsp The "problem" you're seeing is the ground potential changing, which changes the voltage signal the O2 sensor generates.&nbsp It's not the "power source" that's bad - it's the ground that's "bad".



-Ted

BlackRx7

Durhhh, My Name is Durhhh, I forgot, Durhhh