O2 sensor
#1
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My 2000 XJ8 is going through 13 mpg after one of the ignition coils went bad, I think I may have killed one or more O2 sensors to to misfire and running rich for about 2 weeks waiting for a new coil, would anyone know if I only need to change the one O2 before the cat or do I need to change all of them? There are 4 am I correct?
#3
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