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How much pipe do you have down stream of the sensor.

My guess is you need 2' or so for it to work at idle and less than that at wot

Tim
 

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generally you need 18" of pipe after the sensor.I have seen some guys run the 8 o2 sensors in the primary header tubes to get the most accurate readings
 

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mine dosnt work either with open headers (lm1) add some pipe after the collector it should work.
 

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I have an Autometer W/B. It would work at WOT with 6" turndowns on the collector but the idle reading were flaky though. I now have 18" extentions and bullets on the car and it work perfect, WOT and idle
 

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Discussion Starter #6
I tried it right before colector flange. then I tried putting about 12" of flex pipe behind it and it still would not work. got crazy readings at Idle and WO.
 
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