Thread: Wideband jumping occasionally

I'm not sure if this is a sensor issue or a controller issue, but my wideband reads normal for the most part then shifts to some odd number. For instance: idle usually hovers around 14.5-15.2 but then occasionally it will lean out as much as 16.7 is what I've seen. I highly doubt it's a power or grounding issue and to prove it, you can read my write up I did. Maybe a fueling problem? Stock pump/FPR with Evo 8 injectors.

It even does it during cruise occasionally so I really don't know what's up.

Suggestions or ideas?

A slight hiccup in the tune is possible. Check to see if it goes rich right before it happens. is it at the same load value when it happens?

According to the gauge, yes it does. I've watched it and during cruise, I saw it jump from 13.7~ to 16.5~

And yes it's roughly the same load.

i would say either injector compensation is slightly off or the airflow is slightly off. Usually when ive see something like this it something like this: car dumps more fuel then needed so next time it leans out, but sometimes it leans it to much for the amount of air. a very very basic way of looking at it... lol.

Well the injector settings are stock and I doubt my MAF scaling could make it twitch that hard. Maybe my injectors are needing cleaning.

Well I did a little experiment. In 3rd gear I went about 60% throttle and my AFR's were steady at 12.6 during spool up and further on so I doubt it's the sensor. Maybe something is up with my tune.