Need some help with O2 sensors

[Always2Slow]

I am a bit confused here and looking for some guidance tried a few searches and couldn't come up with the information i am looking for. First i would like to know how i could tune the closed loop o2 sensor maps b4107 and b4105. What are a few maps i could make to log this information and make it relevant and my stoich afr is set at about 14.17 which makes things more confusing for me. I am using a NGK afx to log everything and looking off the gauge isn't accurate for me as its stoich is set to something like 14.53 or something from the manufacturer.

[spy2520]

Can you log lambda or eq instead of afr? If so that should negate the difference in the two different stoich settings. I could be wrong, but my theory was always that a wide band reads lambda and calculates afr based on the value you set as stoich or the stoich of the fuel.

For instance my wide band considers 14.7:1 stoich and the pcm is set to something slightly different. However a lambda reading of 1.0 still means 1.0 on both sides even though your gauge reads 14.53 and your pcm is looking for 14.17

[joecar]

+1 what spy said.

[joecar]

You want to tune B4105 and B4107...?!?

[Always2Slow]

Well yes i would like to tune the tables for more gas mileage i enabled lean cruise and seen great results with it so far and would like to lean things out a bit while just putting around town to help my gas mileage some more. Right now i have b4105 at 450 across the board and i would like to fine tune that for sure. I am using EQR for everything but wasnt sure how everything worked as in regards to my stoich value with making some sort of map for this because alot of people say to look at the afr.

[EagleMark]

.450 get's it centered on Stoich. I don't think trying to stray from that is a good idea. Just not accurate outside there and it's just a switch point. What I have done with other calibrations is find the 02 low and 02 high settings, usually .300 and .700 and bring them closer together to slow the switching. It sure smoothes out AFR or Lambda. Just have not seen those settings in definition?

There's lots of options in lean cruise {B3639} table.

HTH!

[Always2Slow]

Well i would like to tune for some more gas mileage while not in lean cruise for around town type of stuff i have seen people achieve results with high timing but thought there was a way that i seen reading to at least lean out the fuel while in closed loop.

[EagleMark]

I read here, a guy lowered the .450 to .3xx and gained some milage! He said it showed as running leaner on his wide band. I've never tested it so? It would be a very bad idea to even try without a WB because of NB inaccuracy outside of .450/Stoich

[Always2Slow]

I have a wideband to log everything but having trouble figuring out what to use for data column and row to log everything so i can see what my EQR is while driving around in closed loop. Anyone have some pointers on that one?

[EagleMark]

Just open a B0101 wideband map, then edit to your wide band PID and save as new name...