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i just had a scantool on my 88 ,does anybody know if the o2 sensor is ok when it shows lean/rich all the time or is it supossed to be either lean or rich.?
at the same time it counts from 200-900.is this normal ?or are my 02 sensor broke..:bang ...
 

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i just had a scantool on my 88 ,does anybody know if the o2 sensor is ok when it shows lean/rich all the time or is it supossed to be either lean or rich.?
at the same time it counts from 200-900.is this normal ?or are my 02 sensor broke..:bang ...

Normal..the O2 with switch between lean rich all the time
 
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