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Re: Replaced Upstream O2 sensor and still failed smog
Posted to Emissions Forum on 2/15/2009 5 Replies

[...trimmed text...]

How do you know that?

Why are you assuming that a '93 Escort, in proper fuel control by the 5 gas numbers, didn't simply have a bad 15 year old cat?

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5 Replies Received (View Replies)