Hope someone can answer this.

When you datalog 02 voltage to see if your running rich or lean. Should you be reading from BANK 1 SENSOR 1 and BANK 2 SENSOR 2 ?

When I datalog from these two sensors BANK 2 voltage is much higher than BANK 1

Thanks in advance

 

actually B1 and B2 usually are a little off in terms of how rich/lean they are.

B1 is passenger side, B2 is driver's side

why don't you have widebands? your voltage doesn't go up to 5v?

 

Thanks Wired!

Good questions, it's a 2005 coupe. I should have them.

 

You should have both narrow- and wideband o2 sensors in each bank. The wideband (afr) sensor is in the exhaust manifold, and the narrow band o2 sensor is in the cat pipe. Looks like your graph was reading the narrow band sensors.

 

you need to look at B1,S1 and B2,S1 The "sensor 1" is the upstream O2 that controls fuel mixture. The sensor 2 is the one that gives info on whether the cats the are functioning properly or not.