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A/F ratio accuracy with sniffer after the cat??

325 Views 1 Reply 2 Participants Last post by  Peter, 
SupraTuRD
The owner of a local Dynojet chassis dyno insists that the A/F readings are not affected whether the probe is placed before or after the catalytic convertor. Can this be?

Thanks in Advance,

ak
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P
It should be as close to the engine as possible - faster readings!
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