can running too rich foul o2 sensor and make it read lean .
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From: reading, pa, usa
can running too rich foul o2 sensor and make it read lean .
just wondering cause with the tune i made i am runnin a lil on the rich side. my plugs are blackish and the electrode is a med brown color . and i just bought this o2 a few weeks ago and now at WOT it reads way lean. and i know the car is not running lean.. so im just wondering if too much fuel could foul it out and cause this wrong reading..
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