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Re: My personal truck won't pass CA smog for CO
Posted to Emissions Forum on 2/22/2016 1 Reply

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Your A:F ratio is 14.27:1 or 0.970 Lambda.

Your combustion efficiency is 93.84%

The A:F ratio is too rich to allow maximum catalyst efficiency. But, I suspect that a few other factors are at play... Login to read more.

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