Oxygen Sensor

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dancfos

01-11-2004, 06:15 PM

Will oxygen sensor cause black soot to come out of tailpipe and not idle smooth on 95 Blazer?

tom3

01-13-2004, 08:46 AM

Yes, but you should have the SES light come on. Might be a dirty EGR valve, or maybe the central fuel injector going bad. These parts are not cheap if needed to replace.

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