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1979 911 SC catalytic converter test port


Vehicle Information: Model: 911sc; Year: 1979; Body Type: Targa; Total Mileage: 108,000;

According to the Bentley manual, the O2 is measured at the front of the catalytic converter.There are no instructions as to how to access the test port.How do I get to it and would it be possible to thread in an O2 sensor only for purpose of monitoring the fuel mixture for various conditions? Monitoring the O2 is nicely described by an article on the Pelican web site.

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