Standalone Wideband O2 Observations vs. Stock
 

I've been watching my new LC-1 Standalone wideband for most of the week and decided last night to compare its AFR values vs. my Canscan values that are from the stock wideband for the stock PCM.

My standalone wideband is farther back from the engine (just before the cat on my midepipe) and as a result seems to run about 0.1-0.3 leaner than the stock unit. Both seem to track closely as far as daily driving, getting hard on the throttle, the standalone seems to move more quickly.

Both seem to confirm that our warmup enrichment is leaner than I thought (at least in Houston) and runs about 14.0-14.2 at startup assuming outside temps of 50-60 degrees sitting for 8-9 hours.

During Deceleration, my standalone shows the engine go ultra lean briefly as fuel is cut, going to about 18.0-20.0 during deceleration in gear. The stock wideband doesn't seem to show that same value, it goes into the 15's but not as high as 20.0. I need to do some logging of this, as the canscan values I'm referring to come from a AFR tab that looks like a guage.

Just thought I'd pass these observations along. All of this is part of my preperation to go back to using my Interceptor-X.

interesting,

my hymee scan tool goes to 20 on decel.

btw, love the avatar..

beers :beer:

I have the range on my LM-1 set to go from 8.7 to 22.4.
On decel, I'll see the end of the range on the LM-1 while the CanScan still shows 18 or so.
The latency you see between the CanScan and the LM-1 is just the nature of OBD-II.

I don't have a CAT and my sensor is farther down-stream than yours, but I see about the same .1 to .3 lean on the real measurement compared to the OEM sensor.