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Old 04-21-2003, 12:56 PM
manny manny is offline
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Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160

You are correct about the EGR causing a lean condition ( as far as the O2 and ECU is concerned ).

The next piece of the puzzle is, if the EGR is acting up, the HC would normally go quite high. A reading of 120 ppm seems rather low, although it was not specified if that number is at idle or high rpm.

I guess there is nothing like " being there ".
2007 C 230 Sport.
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