aem uego wideband readings bouncing

[0GBlown]

So i installed the wideband a few months back, but ever since i installed the wideband readings are constantly bouncing all over place at cruise and idle the only time it relatively steady is at wot and after driving for bit and idling in park.

Has anybody had a similar problem, i thought the uego is supposed to be self calibrating? or maybe a bad senor?

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[OffshoreDrilling]

how much is it bouncing? going up and down a few tenths is pretty normal under cruise as the engine load is changing often and the PCM is making adjustments. WOT it should be dead on give or take a tenth

 

[0GBlown]

anywhere from like 13.2 to 17.1 but mostly 14 to 16 range

 

[willizm]

some bouncing is normal at cruise or idle. When WOT it should stay pretty steady if you are tuned appropriately.

 

[TommyGloves]

anywhere from like 13.2 to 17.1 but mostly 14 to 16 range

That sounds normal when the car is in closed loop. You'll see richer values on throttle tip in as the PCM commands fuel enrichment. You'll see leaner values on decel as the PCM commands fuel enleanment. The O2 is constantly bouncing between rich/lean readings in an attempt to maintain the ideal AFR.

Like mentioned, WOT throttle should give you more consistent readings as it is based on a predictive air to fuel estimation. (assuming your tune is correct.)

 

[0GBlown]

also i just notice today that when looking at the wideband and laptop at the same time that uvscan seems to be showing values .6 to about 1 pt higher than what the wideband is actually displaying granted the values are changing so fast it hard to tell.