Quote Originally Posted by lswing View Post
Why would he code out primary Lamdas? Wouldn't you just code out the second set if running catless?

The actual reading for the Lamdas should be above .90, closer to .95. You're running lean. More fuel as mentioned. You can log injectors duty and calculate how close to max ~85% you are.
Never trust narrowband voltages, they are showing weather on Mars. The only thing they are good for - indicating 14.7:1, and that's it. Anything off - and they can show whatever they feel like at given moment.

You can make some very ballpark-ish presumptions about your actual AFRs based on EGTs and ignition angle + ignition retard (CFs), but if you have a wideband - just look at it. Anything between 11.5-12.5 when stepping on it should generally be fine.
EDIT: AFRs I quoted are for a pure gasoline, without w/m injection.