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Re: Audi 5000 Quattro s 1987 Running rich at idle
Posted to Technical Discussion Forum on 4/25/2007 2 Replies

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If the PCM responds to an artificial rich signal, why won't it respond to your O2 sensor? Sounds like your O2 sensor isn't working. What is the voltage on the green wire when connected? This cable is ... Login to read more.

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