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pureguava

O2 sensor problem probably.....SJ part ok?

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 Hi

i suspect I have an O2 sensor issue and want to make sure the one I have ordered from SJ is ok?

I recently removed my cat and installed an alunox 3inch dual exit exhaust ( very very nice and easy install) and the stainless manifold. 

I couldn’t no matter how I tried could get out my old O2 sensor so bought the Bosch sensor equivalent...13030? 

If I idle for longer than 1 minute it suddenly increases revs by about 500 and the CEL comes on .   If the sensor is disconnected it does not happen  

Free scan shows a O2 sensor voltage of about 0.4 with engine off and a rock steady 0.004(!!!) with engine running - no fluctuations at all I suspect this sensor is not usable....I have ordered a new one from SJ is this one known to be OK?

 

 

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That sensor voltage should fluctuate all over the place.

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Yes!! Problem solved......one of the sensor wires was sketchy.  I found when I was unscrewing the sensor it started fluctuating in freescan.   Traced it back to one dodgy wire!!

all solved ....thanks again!!

al

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