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Old December 2nd, 2019, 14:41
lazyxj's Avatar
lazyxj lazyxj is offline
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Re: Where to mount my wideband O2 sensor on my 2000 XJ?

Quote:
Originally Posted by bajabronco View Post
LazyXJ -I have the same headers as well.

I am still thinking of going before the cat. Have you found a big deviation in the readings between the front and rear banks on your two wide bands?
The wide-band O2 sensors must go before the catalytic converters to get an accurate reading of the mixture.
I notice no major differences in mixture readings when switching from one sensor to the other.
Fuel trim levels can be read with OBDII monitor, such as a ScanGauge or Ultragauge.
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