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What is too low for O2 millivolts?

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Old 06-26-2003, 10:59 AM
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Default What is too low for O2 millivolts?

On Scanmaster I like to run around .900. However, sometimes I see it dip down into mid to lower .800's. I was wonder around what millivolts is way too lean? Where do most people run?
Old 06-27-2003, 01:59 PM
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Default Re: What is too low for O2 millivolts?

I assume you are talking about WOT readings in PE mode . . . the acceptable range is supposed to be 875-910mv. They should average out to 890mv for max hp. So anything less than 875mv would be considered to be too lean.
Old 06-30-2003, 03:01 AM
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Default Re: What is too low for O2 millivolts?

I tuned my car down to 895 mv and when I finally got it on a dyno I was almost 15:1 a/f ratio!!!!

When people say DON"T tune off O2s, I now know what they mean.
Old 06-30-2003, 03:35 PM
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Default Re: What is too low for O2 millivolts?

I tuned my car to a .900 and turned out perfect 13:1 on the dyno




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