PLX SM-AFR wideband jumping around (video included)

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Jan 31, 2013 | 04:58 PM

#11

GREENSIERRA

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From: Canada

mine jumps around aswell except under WOT.
looks normal to me

Jan 31, 2013 | 05:15 PM

#12

ak2007r6

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From: Alaska

Unless you are WOT it's going to be a dancing light show. Looks normal to me.

Jan 31, 2013 | 05:22 PM

#13

operatorfailure

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Launching!

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From: Springfield, MO

Sounds great. Thanks everyone.

Jan 31, 2013 | 05:34 PM

#14

ak2007r6

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From: Alaska

Quote:

Originally Posted by KHester84

Isn't the fluctuation around 14.7 the O2 sensors switching and the ECM responding by making the AFR rich then lean? Mine does it too. The O2 sensors are sort-of a discrete input to the ECM where it is either rich or lean and the ECM adjusts the afr to compensate. Too bad they don't use a wideband and let the wideband provide precise AFR feedback.

Correct. o2 sensors only tell when it's above or below stoich so therefore it only responds and makes correction after it goes above or below stoich (14.68)