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PeteBrown PeteBrown is offline
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Join Date: Oct 2001
Location: Cleveland, Ohio
Posts: 500
Is the O2 Sensor necessary?

My mechanic, Eric Steinel, said the O2 sensor is not needed for cars (SC's and 3.2 Carrera's) running without a cat. He said the O2 sensor is only there to richen the mixture slightly then lean it out to "ignite" the cat. However on later cars (964 & newer) he said the sensor plays a role in determining the mixture.

My concern is that if I run without the O2 sensor, the car will run rich and therefore increase the likelihood of premature valve guide wear. Any thoughts?


Pete Brown
'87 Coupe
Old 01-25-2002, 09:21 AM
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