Thread: Failed etest :(
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Old 04-29-2013, 02:12 PM   #22
everlast
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Join Date: Mar 2004
Location: Ottawa
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I believe it is the dilution of the emissions to free air. It has an upper and lower limit, so if you were to have a malfunctioning air pump it would show there.

Also, if you were to have a large exhaust leak, the dilution would be too low and fail.
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