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O2 sensor Lambda Lean and Rich

  • karim
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8 years 3 months ago #12604 by karim
O2 sensor Lambda Lean and Rich was created by karim
Dears,

I want to know the rich and lean condition of Lambda. I want to test fuel delivery issue using lambda as my source of diag. what is rich and lean condition of Lambda?

Thank you

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8 years 3 months ago #12613 by matt.white
Replied by matt.white on topic Re:O2 sensor Lambda Lean and Rich
Are you referring to a wide band oxygen sensor?
If not, a rich a/f ratio is less than one. A lean is greater than one.


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8 years 3 months ago - 8 years 3 months ago #12622 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic O2 sensor Lambda Lean and Rich
This might help ---- normal narrowband sensor, the blue trace is the upstream sensor B1S1

" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
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Last edit: 8 years 3 months ago by Andy.MacFadyen.

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  • Tyler
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8 years 3 months ago #12653 by Tyler
Replied by Tyler on topic O2 sensor Lambda Lean and Rich
Listen to Matt and Andy. ;-) .9 lambda or lower is not unusual during wide open throttle. Very positive numbers (1.5 or higher) are expected during fuel cut deceleration.

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