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Old December 2nd, 2019, 13:41
lazyxj's Avatar
lazyxj lazyxj is offline
NAXJA Member #1310
Join Date: Mar 2004
Location: Los Angeles
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Re: Where to mount my wideband O2 sensor on my 2000 XJ?

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.
Both XJs are still Real XJs
01 Sport, Russ Pottenger 4.6, AW4, 4" lift, 33 X 10.50 KM2, 4.56-8.25 TruTrac, D-30-E-Locker with alloy shafts, Hidden M8000 winch, Vanco front and ZJ rear disc brakes, Frame stiffeners, Lots of armor, Towing baseplate.
1997 Country, Mostly stock, 2" lift, Engine mods, NP242, Towing baseplate
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