So last week my wide band started going to lean air at various time during my driving I put my foot down and it would come back normal. Its a 09 Pontiac G8 Gt just bolt ons it really doesn't run any different and wen I logged it both front o2's read 920's @ WOT my rear o2's are off cause I run a catless X
Is the wideband in the actual exhaust? Or is it a tail pipe sniffer? You may have an exhaust leak near the sensor.
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It is in the exhaust where the rear o2 on the left side belong, no leaks no frrayed or shorted wire everything has been unplugged and replugged. It is a PLX device about 3 months old only thing ive done differenly was last week i ran the car at the track on 110 octane i only put 3 gallons in the car but the car was damn near empty ran 8 passes on it then when i left the track i filled it up with 93.
Was the 110 leaded or unleaded? If leaded, it may have fouled the sensor.
2000 Regal GS ~ 3.25 Pulley ~ Headers ~ 3"ex ~ 1.85 Rockers
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Gonna' beat you may have hit the nail on the head there I think...
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