I know this may seem to lay a little in the gray area, but well here goes.

I have had my SAFC II from buschur hooked up for a several months. I have also had the volt sensor reading from the blue wire hooked up the whole time.

I reciently put in an Autometer A/F gauge that reads off of the same #1 O2 sensor. It reads just fine. When you are at wide open throttle it gives you a soild steady read. Pig rich that is.

My question is:

Should I be able to see a change in the A/F reading on the crappy Autometer gauge if I change it on the SAFC II. I have leaned it out to bucshur settings and I see no difference between the two maps on the meter. Still pig rich. I even went as far as leaning it out heavy on a low throttle setting to see if I could get it to move. Still nothing. I have confirmed all my inputs on the SAFC II, they are correct. It just runs pig rich all the time according to the both the apexi volt sensor and the Autometer gauge. I have no shop near to confirm this with a wideband o2 and a four wheel dyno.

Is the volt reading for A/F ratio just a joke or what, and the joke is on me?
Any suggestions???

 

On a narrow band o2 sensor like the one you are using, the readings are not accurate. I used to use it on my galant just to really just tune my car at idle, but nothing more. Dont worry...under WOT the autometer gauge will always read PIG RICH...believe me. I used to run WAY LEAN up top with my galant..14.5...even and it still registered PIG RICH

 

as superchargedGTZ says, the narrowband stock a/F sensor sucks on the evo. i only got my defi a/F gauge for aesthetics and to let me know if my walbros fail. Other then that I won't use it as a tuning tool.

 

Well, there is two replys just as I thought. The A/F gauge is a useless tool.

Does anyone have an positive experince with the gauge. Anyone ever made one move with a SAFC II?

 

You need a wide band o2 sensor. They read from 1-5 volts (most of them) compaired to the 0-1 volt narrow band o2 sensors that come on every car.