oxygen sensor
 

Just orderd some parts from our host, one of them being a Bursch cat-bypass. I noticed it has the oxygen sensor bung,. Is it a good idea to install a new sensor when I install the bypass? Just curiuos as I will have to unhook the existing sensor. Also will the sensor adjust the mixture enough so the car can still pass smog. Any help would be appreciated.

Thanks,

If your original oxygen sensor is covered with thick carbon deposits, it's probably a good idea to install a new one so the signal it sends back to the fuel injection is a reliable one and it reacts quickly to changes in Air/Fuel mixtures.

Installing an O2 sensor will ensure your car meets emission standards, as the manufacturer originally intended it to ;)

thanks for the info. I plan on installing the old O2 sensor, but will replace if covered in thick carbon deposits

Actually, Porsche suggests that the sensor is replace at regular intervals. Check your owners manual. Probably every 30-45K. Having said that, some folks believe that you shouldn't fix what's not broke. Does your car run smooth, idle steady, and get good gas mileage? Then you may want to leave it alone.

If changing out buy a generic Bosch replacement and splice in....save about half for the same product.

Car runs smooth, idles fine, a little popping from the exhaust when decelerating(cool F1 type sound) but nothing that raises alarm bells.

RickM I an intrigued by the Bosch and splice comment, can you elaborate?

Basically, RickM refers to a generic BOSCH Oxygen sensor, that isn't Porsche specific. BOSCH makes 1 wire, 2, 3 -> 4 wire generic Oxygen sensors, which you can use in the 911. You may just have to extend the length of the wiring by splicing extra wire length in there, but that's no big deal, if you're handy with a soldering iron.

thanks. I will do that if the snesor needs replacing.