81 911SC Oxygen Sensor
01-26-2003, 05:51 PM
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81 911SC Oxygen Sensor
I'm replacing the Cat By-pass on my car with a Catalytic converter and can't get the old oxygen sensor out. Is there a way to check to see if it is working? Can I replace it with a "universal" sensor and splice the wire to the old plug? What sensor should I use?
01-26-2003, 06:51 PM
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The way you check the O2 sensor is to check the voltage output with the engine running and warm. If it's between 0.1V and 0.9V, the oxygen sensor is working.
O2 sensors can be rusted in quite firmly - they can be the dickens to get out. Porsche recommends they be replaced every 30,000 miles, so if you're anywhere close to that, or don't know, my two cents would be to install a new one.
I've always used the Porsche O2 sensors. I know that the Bosch generics are sold, and the single wire variety can be spliced into the 911SC wire of the old one. However, there was at least one case of an engine that would sputter and misbehave when raining. Made the owner nuts debugging the problem. Turns out the generic O2 sensor didn't have a cap over the top that the Porsche sensor has. I would call either Reeves Porsche in Tampa or Sunset Porsche in Oregon and find out what their mailorder (Reeves around 25% discount) or Excellence price (Sunset cost plus 15%). They'll be in the neighborhood of each other. As my ageing memory recalls, they're around $60-$65 from Porsche.
O2 sensors can be rusted in quite firmly - they can be the dickens to get out. Porsche recommends they be replaced every 30,000 miles, so if you're anywhere close to that, or don't know, my two cents would be to install a new one.
I've always used the Porsche O2 sensors. I know that the Bosch generics are sold, and the single wire variety can be spliced into the 911SC wire of the old one. However, there was at least one case of an engine that would sputter and misbehave when raining. Made the owner nuts debugging the problem. Turns out the generic O2 sensor didn't have a cap over the top that the Porsche sensor has. I would call either Reeves Porsche in Tampa or Sunset Porsche in Oregon and find out what their mailorder (Reeves around 25% discount) or Excellence price (Sunset cost plus 15%). They'll be in the neighborhood of each other. As my ageing memory recalls, they're around $60-$65 from Porsche.
