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?

 

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.

 

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

 

FCD does not affect AFR readings.



-Ted

 

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

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

 

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

 

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

 

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

 

Durhhh, My Name is Durhhh, I forgot, Durhhh