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Also check the coolant temperature sensor (m) (archive)
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Posted by John A on April 22, 2002 at 00:06:36:

In Reply to: Re: rich mixture,,..need advice posted by bmwcaw on April 21, 2002 at 22:17:40:

If it goes bad, usually the car runs rich.
John
88 ///M3 Cinnabar

how do I lean out a rich mixture to pass emissions?

Check your O2 sensor-how old is it? If bad will make computer go to more rich condition.




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